" Wow. This episode of system has brought you by go to edit and Netflix. There're so many USB powered gadgets out there chances are you get a couple in your pocket and he charged with -- next to a PC your wall outlet. What do you find yourself in the middle of nowhere without access denied there. We have the answer in the form of portable USB power charger something any real -- should build for themselves. DI YUSB powered chargers on today's episode of system. Well the system up have a Norton and it got. USB powered gadgets are everywhere we're sure most you're looking for way to keep them charged even if you're -- your PC or wall outlet like when you're trapped on a plane. We figured it's time to do a portable USB powered booster we decided."

" Build a couple of different versions three in fact what being let down and dirty version requires no soldering and nothing beyond you know. Two figures to march 2 parts readily available number two a little bit more complicated using a soldering iron and three parts. Which is a little bit better job. And number three. Version which is complicated based on late night leading -- is mean to boost USB power and."

" What I build what with a bunch of parts and soldering what I can basically -- USB cable to a couple of matters so it."

" USB cable to a couple of batteries you get your quick and dirty for sure charging it right and it's just it's -- trickle charging him pulling and pulling things out. It's not gonna work at 100% here US beef products because the quick and dirty super simple and only provides forward Apple's which might be below the voltage threshold for. Many products lot of progress these technically five volts and this is he's technically it's now boasts double it triple -- batteries code is what is said to be one point five volts. They actually run from what what portable point six the dozen different street. So why would you build a support versus the complicated absolutely is that 42 part is like -- parts. It guarantees to give you a very clean Bible signal -- is a lot of hours behind it. Mid air and it's it's more complicated so it's one of those trade offs if you have something better you have to -- report uses integrated circuit. Instead of using what we've done in previous USB charger basically pulling it off in the form of heat using the transistor exactly so if you want to do the quick and dirty one McNamee -- you can do a direct voltage but it. Either for half or six Apple's. I'd never recommend doing six holes directly most US beef products are gonna have a Bible regulator built into them located just to be sure -- next. Looks however however this. Is there really wouldn't recommend doing -- would a 100% sure that you were you know iPhoto or whatever has a viable regulators and it. And it's really we're -- it now for quick Bible is below the Bible threshold so as a general rule if you're starved for power. And you know you're in the middle of the desert. For some reason you have to you know cell reception but you don't have any batteries you're trying to make that emergency phone -- let's just -- a good little of the desert. You know this will work okay without any -- tax really without any any soldering here anything just one of those things where you can probably figure out how to do just literally with crappy -- your house like that thought that little grade version provides a cleaner source of bibles and this is in the reference system before. But experts lot of -- heat so you'll lose a lot of empowers citizens of printing a few episodes ago we talked about soldering techniques in building to our. Or headphone amplifier and it's episode -- talk a little bit about battery. Issues and issues is really the word because. People really understand you know. Oh Islam and the basic you know voltage to bridge trade off and especially in a lot of people don't understand what it -- which is is. How much power can just deliver. You don't not at a time but throughout the course habits of its battery life circulated that particular amount of -- yeah it's basically if we're thinking of batteries as. -- energy -- how -- a given battery. How much water can you put in a bucket so and power. If you look at the back of the battery you know typical double -- battery is gonna be between 500 billion dollars in wonder. A thousand. Hours okay so what that means is that if you or product let's -- it's an iPhone. If that product takes one. And our. You know per hour that's that's how much it it's pulling out of those batteries right. So if you have a one of our battery anyone -- device that means that. In your powers should write your battery now it's theoretically it's not exactly who is in Oregon. If you have a half hour device and a one hour. Battery that means that that device will last for two hours of those battery. But now this is important partners is tricky part. Batteries can be very -- so you have three different double layer AAA batteries always very different it. Some truth like I've seen double A batteries battery for 2500 no -- essentially two point five and that exist on some of -- actually read it some you know like you mentioned -- El -- for example I was just appeared. And I need to buy some double a batteries and I was feeling awfully cheap so I think instantly eighty cents a four pack and it should look at the empowers. On the kidding Pete Davies currently rated for 100 million. So like I put it -- that wanted to see the -- at work right until I. I don't think it lasted three minutes and it stopped public hook -- broken screw it and they actually looked at the batteries on your pet. -- intuitive and by the ten dollar batteries which actually had a decent you know it powers like 1500 millions -- them to repent and power readings of these on usually is it that dropped one or twenty yams or you have to go to the manufacturer's room. Information to find out what they do their -- all the manufacturers do their best scorer you know. -- standard device usage so. These are only estimated usage and it's gonna vary by notable batteries whether it's an alkaline eight medical little hydrated nickel cadmium lithium all agree rechargeable it's. So there's a lot of articles she's very cold cuts that actually -- in this site. Who designed our third circuit for the day. Should go to a good example of why not to use nine volt batteries versus using. Double -- batteries of the reason for that is because not all batteries while they have a higher voltage have a much lower in our rating typically. Okay this is again depending on what batteries you buy. So in the 88 is site you basically what she says as well secure excellent little battery but it only -- 400 billion powers where. As if you're using for I double A batteries you can get up to Italy two hours -- that. On and so obviously four or five volt USB product. Those four double a batteries are going to last significantly longer -- than people that. So your mileage may vary of that in the you know if you've got a device which sucks a lot more power down Lincoln iPhone sucks a lot more power -- the new iPod or your little USB still. If you love it and the batteries are going to vary wildly vibrant as well and so this -- things where. What people are shopping for batteries in variably you know if your -- while -- carrier you know local hardware store. People about it price right where they look at OK. Major brands like energizer and ourselves Duracell you know -- it is because of things. There just like which was cheaper I literally look at utility -- our. And it to what the prices and -- the mouth of how -- totally getting per dollar this has really complicated. But it's -- the."

" It's a but it also you're also making the assumption and it's it's probably in -- energized some the other -- fairly safe that you're actually delivering the amp hours that they claim -- yes."

" You know and if you don't really long diatribe you know all of the legal ease you know don't give you the basis for -- and they admitted to battery slow pace of deliveries and this is. This is -- Ph.D. now but if you get -- to building robots which obviously money you know what your your low. -- but there are so many great articles like it Herschel labs dot com Alexander resolute and has written us. Great article really explaining battery slopes which is to say that. So using for our example today if you have one point five full double -- battery and how that from four different manufacturers. The battery slowed basically says it's it's. A chart of time versus voltage right. So in your first couple of minutes better slow if it's rated for what point 5 it's actually probably delivering one point 6 that's right it's the slow start this way. And it will level off for awhile one point five. And then you finally get to Donald's now. When you get to rechargeable batteries when the interest in things is how that slope looks it looks different it looks radically different so. Lithium polymer batteries are great at delivering exactly what they're rated for bulldozed for 100%. Of -- and battery. So if you plug it a lot liar like -- Barry. And it would. For example is the matter you'd find it's -- little batted the little flat -- means that they're very flat so they're not use their dogs around mattered to him. They're not gonna look and did -- that could be the -- the department -- with the 22 packs -- double -- batteries from energizer -- lithium -- it's actually really hard to buy eight lithium polymers acts harbors are some things like that because it's so easy to explode them. And there there are self oxidize -- so you can't just use a regular fire extinguisher with the legal when they -- that they don't -- that. And so but what would the good side of -- Polly's is is their battery -- is almost perfectly flat so. If it's one point five -- is an example it's pretty much anyone point five volts for the entire -- hour lifespan of that battery. Now if you look at nickel cadmium and nickel metal hybrid that battery slope is much different. We different. Like a nickel a nickel metal -- slipping off much sooner right it'll slugger but it's always -- point five both students receive a point 31 point two of put him."

" One lesson forgo dues they whatever possible use rechargeable batteries and he argues disposable batteries please make sure they are properly recycle. Don't let them end up in a landfill which I think we're -- sort of -- bad -- era itself. So we're off to the other workshop of these things must -- six. So I appreciate three different ways to get power here USB devices okay. The first line it is the simplest but it's not guaranteed to work and probably only work about 50% of your USB devices."

" If you have something like a small motorists thing is really probably get a work. More complicated devices such as iPods may or may not work depending on what kind of voltage regulators they have built in to them okay. For all of these devices you're gonna need any female USB adapters now these come in different forms in this case. I've broken into Roger's desk in particular it is USB extensions and company in. Okay this is good and as -- showed the previous episode with the I headphone amplifier I really like to have a cable coming out of some things that we've got more range and play with it okay. He the other thing that you can news is you can use just aboard -- to bull. He don't USB plug okay so this is when -- personal things that depending on how you want to do it depends on. You know which he's when he's the port notable or whether you subpoena cable. So I'm actually going to take this USB cable and it just going to cut it using my leatherman. Square before this is one of the most useful tools on. -- this is from make magazine it cost like 2030 bucks I don't know exactly companies almost every day. It's gotten built is -- Knife blade it's got. -- wire strippers from multiple gauges and wire cutter it's gotten needle nosed pliers. Small scale Phillips head into. Regular flat -- it's really great tool is a great thing for your pocket so show you how to use this. Four -- project so the cut open. My USB cable and and give it a little bit more late. Here so I can have more better exposed wires and peeling back. The -- Cover of this to expose before wires -- a look at these this is an industry standard. That you're gonna see. Four different colored wires your gonna see the black the red to green in the way to degree in the white partnered. Are your positive a -- negative power cables. So we're just gonna need to black and the red power cables and so again just using list were before I would -- these open. Now what you've done that all you need to do is connect the black and be read to the black in the red cables your little. Battery pack put them together and now we should have he cleaned. Power source coming out of the USB adapter we -- have you reasonably clean. For half bolts coming through this which is not. Five volts so this is very important but this is really notice the dirty backroom kind of electricians job. If you try to do this before batteries you're gonna unit cleaned six -- which might short out. Your device okay. Every device is gonna be different so when you -- iPhoto or iPod. Or a little snow men sculpture or you're USB notes whenever -- might be. That's USB driver. If you give it more than five volts you might bird count the device. A lot of devices are actually house -- regulators built into -- and you want but I still don't recommend. Giving it more than five volts in this case for giving it forwarding. In testing this I found that my iPhone. Will not accept -- charge for example it needs a cleaner. Thicker power source McCain needs a full bibles how ever when it plugged in -- iPod. It did actually start pulling some clear through that. So depending your your device this Mayor -- work again this is the super quick and dirty so is really not your optimal solution but. If you're stuck in a bargaining to charge up the USB device over. This might work --"

" Signaled the thank one of the sponsors of today's show. Godaddy.com. When making an impact on line go to any dot com has what you need starting at less than five bucks a month web hosting for good -- dot com includes 99 point 9% up time. 247 support and free access to the go to the -- connection that is before -- quickly install. Over fifty free apps like word press Q what Drupal OS commerce and quite a few more. Go to -- dot com makes it easy to customize your own virtual dedicated server. Choose one of three popular plans horse like your Linux or windows server with all the plan options you need. Now the -- deal we got one for -- codes this one that's SYS one big check out you'll score additional 10% off your entire order. Some restrictions do apply please see the site for details it was a favorite your system. Get your piece of -- that I'd godaddy.com. And use that code SYS one support us by supporting our sponsors six."

" For a second project we're gonna look at giving it a clean five volts which. It's. A much simpler project but. It's not gonna last as long as our third more complicated project but this is a project. That anybody can do with a soldering iron technically could do us soldering iron but it really would recommend it. But it will offer a very clean viable source for your project. The only thing you're gonna need more for the first project as you need a four cell battery holders he needs successful or higher you -- battery. And you're gonna need in five volt regulator okay these are called seven you -- it's a very very common component you can find and any RadioShack. Did you key moser. Generally six -- that let's say finals. And it reduces it to five -- in leaves that extra voltage off and heat so if you're putting it against the 36 will -- C source. That is gonna get a room to really hot towards the end answered very hot voltage regulator. But if you're just using a viable source or a sixfold source which is four double a batteries. It's not gonna be nearly that -- it's been given in Geary clean by Apple's warrior project okay it's only a little bit more complicated. Then the first version. But it does require a trip to radiation so let's look at this. Okay if you happen to have twisted wired pairs amusement if you don't it really helps to twist. Here wires together really helps to deliberately. So I'm doing isn't -- to black choir and slowly twisting me -- if you have a really long links a good tricky canoes you can put the two wire leads. In a cordless drill and then reload and it'll give unix type rap for it in this case we're we're only using two -- you really need to do that. So. Why reviewing this is to connect. Our wires to -- voltage regulator and again this is ghetto electronics 11. This really isn't how you normally do it but it for a quick and dirty commitment that this is this is it. Okay anyway. So this is our voltage regulator you'll notice it has three leads coming out of it. And basically what those leads are is is the first leading issue voltage in positive okay. The middle lead -- common ground and that's for both voltage in as well as voltage out. And then the final lead is four. Full page out so basically what you do you have to wires coming in which is you -- six or higher goals coming -- And then you have to leads coming code which you regulated. Five full supply kind of so now we're gonna take our little twisted wire pairs and we're gonna connect these would for in and look for out of machines two different methods of doing this. 12 with the nine volt battery and one with four double layers. What are things -- would always have is shrink -- OK you can get that from. RadioShack. He get a whole bunch of it for very little amount of money you know a bigger role that you'll probably ever using your lifetime for ten bucks. But you always want to use it to make sure that your electrical circuits don't short out a lot of people try to use electrical tape I advise against it because it's too hard -- round title components like going to be using. Ideally you would use. Good heat -- with your shrink wrapped me can shrink but you can also use a liar and a package that'll work just one. Right time and starting with the center ground position and that's because. It's the hardest to get that and so when you want to do first is among the hardest and and one of the easiest. So -- connected it any concealer publisher crap off to the side with both players there so that's after its art together we can put the -- crap. And protect the circuit. -- here's -- are."

" and then move them."

" Don't need too much so earnest little bit."

" you know. You know again using mind handing me QWERTY Reuter. --"

" Theoretically."

" Bring orders dude."

" Tune and pull up. Or. --"

" not only will this help ensure that there's no shorts in the circuit. Put it also strengthened the wiring so heart rate. And it's now. And so now -- can take the other two. And again this is really get a lawyer in little. If it doesn't be hurt curious what that -- over that is is that's also common ground. And heat sync so that is continuous with the ground wires it also acts as a heat sink to help lead off. All that heat is produced by going from. Whatever your input voltage is whether that's Nigel through 36 votes or six bolts down to five votes. And continue -- get electronics when one. Instead of using the proper tool which would be heat gun to -- pressuring tuning. And abusing a lighter now if you don't have he'd done actually a really good sixteen there watt or 1001 hair -- should work that you really want to use heat and this really is a bad tool that totally got its idea. And magically. See shrink tubing. -- And so now not only have you protected. The contacts but you've also strengthened the wiring a little bit because that shrink tubing gets thicker as it shrinks and so notes with -- more secure. Right so now always remember which is the in which is the out. We're gonna. Redo what we've done in the past -- and reconnect this and -- two different. Battery types you can do this with. And nine -- or with four double a.s or force Tripoli -- if that's what you want to go either way we'll work because now we're going from. Six volts which is too much power for you your USB device down to. A very clean regulated bibles with our seven unified voltage regulator. Now I'm not gonna -- of these together we're just gonna test with both the four double a.s and -- test but the nine mostly related to solder it. And in. TV show. I'm not sorry for your your home can murder you're gonna -- Okay before hooking us up the first thing Ireland is test to make sure we actually got everything. And -- circuit actually -- and using. Are handy dandy. Jean code 25 dollar multi metre and a test both. That input voltage as well the output voltage so -- and is. Hooking up here and seeing. It's kind of bonds which. Here's has announced Richmond street and on -- And we're giving them seven point eight -- out. And now we're gonna switch sides and wants to get from our little voltage regulator. Now showing at six point two volts now for those New -- Okay with simple electronic circus like this when you have no load against it no resistance whatsoever that'll that is always in here a little bit okay so even though that says six point two votes was actually goes into my ipodder whatever. It's actually going to be Bible's Genesis one of those things you're gonna have to learn to accept. Is that with no load it against -- volt -- it's always -- appear a little bit high you -- vulnerable to. Okay now and it continued mind really get a electronics private going to run. And inclusive continue to hook up you know black to black render and I'm gonna again test the voltage on the back end and AUSB device. So if you look inside. Our USB female adapter. There's going to be four leads there and basically the outside here. Arguable page positive and negative in the inside pair. Asia actual digital digital information in a -- so the only ones -- need to test against -- the outside to -- the insight new. Are your your digital information were not actually sending and receiving digital information for the future percent of system. But for now we're just sending power. So and they test using our volt -- to make sure that we're still getting that queen a full page coming out of okay. So now the final test of get a engineering gonna want this to hook up our USB mill plugged. And pocketing too. Serious Venus iPod. And implement those teachers testing. And magically. It comes let's try that on my iPhone and see how clean power regaining. Once again my iPhone does and likeness. Japan so depending on what device you're using is gonna depend on. You know what your results are. They'll swap this now with the nine volt conceiving of anything better but right now it's working for the iPod it's not working for the iPhone. Your results mean very especially depending you know you're USB device it were only testing against an iPhone three G. And an iPod in this test that -- as can Julian USB devices out there so you're able results are gonna vary wildly depending on what USB device for use."

" It's time for our Netflix sponsored movie ticket awake this week Hamlet two yes Hamlet two. Starring Steve Coogan and Catherine Keener is delightful comedy centers on a failed actor turned high school drama. Unfortunately the students aren't as enthusiastic about the arts he has. And looks at school threatens to shut down -- department the cooking teacher decides to write an original sequel to Hamlet involving time travel in the classic tune. Rock me sexy Jesus. If you're looking for a laugh -- times to him -- in your Netflix queue now. -- to forget to check out the other 89999. Titles Netflix has offered including Blu-ray titles. You're -- to find any title you're looking for plus with forty shipping centers almost all -- is happening just one business stay in shipping both ways is for -- you. Prosecute Xbox live gold member you can receive Netflix on -- viewing on your Xbox 360 that's right. No discs or mailbox is required your movies instantly streamed over your broadband connection straight to your Xbox 360. Plans start at 499 but as an assistant -- or you can get a free trial by signing up today yet Netflix dot com slash systems. -- So for our third version -- we're actually gonna use -- step up voltage."

" Converter calling from a lowly three volts to a very clean very powerful. Five volts. This project. Takes a little bit longer it's a little bit more complex it's definitely more costly but it's pretty much guaranteed to work with just about any kind of USB device you've got. Now you can buy a very nice printed circuit board for all of this stuff mean by lady yen at lady did not. Or you can go ahead with a hard we like him to do it here so we have an easel project. Either way will work just fine there's couple different ways of doing this the way I would be doing it is a lot like how we did the iPhone. Had booster thing that we did a couple of weeks ago. On it and using eight prototype and board. I'm getting lots of sauter bridges and things like that -- work. If you don't do that the lady -- a website we'll give you a very nice printed circuit board for a couple bucks which you know makes me feel like easier it's a tough. I would have Pickford through all the soldering and root as he works. -- Okay so now we're gonna soldering doing it the hard way using prototype in foreign. To put in the microchip and remember from our previous episode we always put the micro -- in last last last last last thing we did over soldering we tested over star points. Make sure there's no bad connections managers and everything's continuous -- Obama. Finally put in the microchip to make sure we don't destroy anything and opening an electric game. Please snapped as it slipped similar. The lunar batteries. The LED should actually only come on. If it's running out of power the -- low power only the indicator which is an option if you're making this project. Another final test is in the pundits it and see if it charges mine."

" It's charging get so this is so small and so compact it just like a previous episode it will fit into an all points -- If you want to be really cool you can totally combined the two projects in little -- tin. Doing both the headphone amplifier and the iPhone USB charger in one all points to an awful this. We're into off two double A batteries will fit just blurry and in the mini all points -- not the -- seal -- NC -- either way. So is is a great project and as you can see lake. They -- versions this is actually charging my iPhone. Lady in to have a big long laundry list -- her website of the things that this is guaranteed to work with -- not work with so you can go down there and figure out you know what's -- and whether or not you or USB device will work. And again an iPhone is a really high end device not terms of how cools functionality is but in terms of it's tweaking some things like that so. The other two devices that I built may very well work on you or USB device where you're USB phone it totally depends on. The power settings of the actual USB device excellent. I'm guessing that the iPhone really -- tweaks the kind of power that wants to make sure it's getting really clean power. Warehouse a lot of other USB devices such as the iPod. That worked fine with the other two devices. You know it's gonna very device device so if you need something for an iPod. Our earlier devices might just work fine where analysts. For the iPhone you're gonna have to go with you know that the voltage regulation circuit here okay that's it for. Our days project in you can actually see in the pieces that if you roll back a little bit. This charge my iPhone -- and fast so it's a good way to you know. Spend a couple hours and build -- circular a little bit more about electronics and adults something useful."

" All right let's go back to studio."

" You know what. Tekzilla hasn't released time I heard look at that now rose 6 PM eastern we PM Pacific -- they would be sure to watch this week's episode to get an insider's view of CS 2009. In the latest coolest and fun is here from the largest electronics show in North America including I suspect a lot of -- a lot of -- what matters is here. And rumor has it. In actual personal fuel cell you can carry around and -- cool and robot in more catch the action on Thursday January 15 at 6 PM eastern standard. As always if you got any suggestions comments or other things you know it's a system to version three. And there's of the forums -- platform and visit our archives division street com slash system about a Norton caucus we'll see you next week on system."

" Wow. This episode of system has brought you by go to edit and Netflix. There're so many USB powered gadgets out there chances are you get a couple in your pocket and he charged with -- next to a PC your wall outlet. What do you find yourself in the middle of nowhere without access denied there. We have the answer in the form of portable USB power charger something any real -- should build for themselves. DI YUSB powered chargers on today's episode of system. Well the system up have a Norton and it got. USB powered gadgets are everywhere we're sure most you're looking for way to keep them charged even if you're -- your PC or wall outlet like when you're trapped on a plane. We figured it's time to do a portable USB powered booster we decided."

" Build a couple of different versions three in fact what being let down and dirty version requires no soldering and nothing beyond you know. Two figures to march 2 parts readily available number two a little bit more complicated using a soldering iron and three parts. Which is a little bit better job. And number three. Version which is complicated based on late night leading -- is mean to boost USB power and."

" What I build what with a bunch of parts and soldering what I can basically -- USB cable to a couple of matters so it."

" USB cable to a couple of batteries you get your quick and dirty for sure charging it right and it's just it's -- trickle charging him pulling and pulling things out. It's not gonna work at 100% here US beef products because the quick and dirty super simple and only provides forward Apple's which might be below the voltage threshold for. Many products lot of progress these technically five volts and this is he's technically it's now boasts double it triple -- batteries code is what is said to be one point five volts. They actually run from what what portable point six the dozen different street. So why would you build a support versus the complicated absolutely is that 42 part is like -- parts. It guarantees to give you a very clean Bible signal -- is a lot of hours behind it. Mid air and it's it's more complicated so it's one of those trade offs if you have something better you have to -- report uses integrated circuit. Instead of using what we've done in previous USB charger basically pulling it off in the form of heat using the transistor exactly so if you want to do the quick and dirty one McNamee -- you can do a direct voltage but it. Either for half or six Apple's. I'd never recommend doing six holes directly most US beef products are gonna have a Bible regulator built into them located just to be sure -- next. Looks however however this. Is there really wouldn't recommend doing -- would a 100% sure that you were you know iPhoto or whatever has a viable regulators and it. And it's really we're -- it now for quick Bible is below the Bible threshold so as a general rule if you're starved for power. And you know you're in the middle of the desert. For some reason you have to you know cell reception but you don't have any batteries you're trying to make that emergency phone -- let's just -- a good little of the desert. You know this will work okay without any -- tax really without any any soldering here anything just one of those things where you can probably figure out how to do just literally with crappy -- your house like that thought that little grade version provides a cleaner source of bibles and this is in the reference system before. But experts lot of -- heat so you'll lose a lot of empowers citizens of printing a few episodes ago we talked about soldering techniques in building to our. Or headphone amplifier and it's episode -- talk a little bit about battery. Issues and issues is really the word because. People really understand you know. Oh Islam and the basic you know voltage to bridge trade off and especially in a lot of people don't understand what it -- which is is. How much power can just deliver. You don't not at a time but throughout the course habits of its battery life circulated that particular amount of -- yeah it's basically if we're thinking of batteries as. -- energy -- how -- a given battery. How much water can you put in a bucket so and power. If you look at the back of the battery you know typical double -- battery is gonna be between 500 billion dollars in wonder. A thousand. Hours okay so what that means is that if you or product let's -- it's an iPhone. If that product takes one. And our. You know per hour that's that's how much it it's pulling out of those batteries right. So if you have a one of our battery anyone -- device that means that. In your powers should write your battery now it's theoretically it's not exactly who is in Oregon. If you have a half hour device and a one hour. Battery that means that that device will last for two hours of those battery. But now this is important partners is tricky part. Batteries can be very -- so you have three different double layer AAA batteries always very different it. Some truth like I've seen double A batteries battery for 2500 no -- essentially two point five and that exist on some of -- actually read it some you know like you mentioned -- El -- for example I was just appeared. And I need to buy some double a batteries and I was feeling awfully cheap so I think instantly eighty cents a four pack and it should look at the empowers. On the kidding Pete Davies currently rated for 100 million. So like I put it -- that wanted to see the -- at work right until I. I don't think it lasted three minutes and it stopped public hook -- broken screw it and they actually looked at the batteries on your pet. -- intuitive and by the ten dollar batteries which actually had a decent you know it powers like 1500 millions -- them to repent and power readings of these on usually is it that dropped one or twenty yams or you have to go to the manufacturer's room. Information to find out what they do their -- all the manufacturers do their best scorer you know. -- standard device usage so. These are only estimated usage and it's gonna vary by notable batteries whether it's an alkaline eight medical little hydrated nickel cadmium lithium all agree rechargeable it's. So there's a lot of articles she's very cold cuts that actually -- in this site. Who designed our third circuit for the day. Should go to a good example of why not to use nine volt batteries versus using. Double -- batteries of the reason for that is because not all batteries while they have a higher voltage have a much lower in our rating typically. Okay this is again depending on what batteries you buy. So in the 88 is site you basically what she says as well secure excellent little battery but it only -- 400 billion powers where. As if you're using for I double A batteries you can get up to Italy two hours -- that. On and so obviously four or five volt USB product. Those four double a batteries are going to last significantly longer -- than people that. So your mileage may vary of that in the you know if you've got a device which sucks a lot more power down Lincoln iPhone sucks a lot more power -- the new iPod or your little USB still. If you love it and the batteries are going to vary wildly vibrant as well and so this -- things where. What people are shopping for batteries in variably you know if your -- while -- carrier you know local hardware store. People about it price right where they look at OK. Major brands like energizer and ourselves Duracell you know -- it is because of things. There just like which was cheaper I literally look at utility -- our. And it to what the prices and -- the mouth of how -- totally getting per dollar this has really complicated. But it's -- the."

" It's a but it also you're also making the assumption and it's it's probably in -- energized some the other -- fairly safe that you're actually delivering the amp hours that they claim -- yes."

" You know and if you don't really long diatribe you know all of the legal ease you know don't give you the basis for -- and they admitted to battery slow pace of deliveries and this is. This is -- Ph.D. now but if you get -- to building robots which obviously money you know what your your low. -- but there are so many great articles like it Herschel labs dot com Alexander resolute and has written us. Great article really explaining battery slopes which is to say that. So using for our example today if you have one point five full double -- battery and how that from four different manufacturers. The battery slowed basically says it's it's. A chart of time versus voltage right. So in your first couple of minutes better slow if it's rated for what point 5 it's actually probably delivering one point 6 that's right it's the slow start this way. And it will level off for awhile one point five. And then you finally get to Donald's now. When you get to rechargeable batteries when the interest in things is how that slope looks it looks different it looks radically different so. Lithium polymer batteries are great at delivering exactly what they're rated for bulldozed for 100%. Of -- and battery. So if you plug it a lot liar like -- Barry. And it would. For example is the matter you'd find it's -- little batted the little flat -- means that they're very flat so they're not use their dogs around mattered to him. They're not gonna look and did -- that could be the -- the department -- with the 22 packs -- double -- batteries from energizer -- lithium -- it's actually really hard to buy eight lithium polymers acts harbors are some things like that because it's so easy to explode them. And there there are self oxidize -- so you can't just use a regular fire extinguisher with the legal when they -- that they don't -- that. And so but what would the good side of -- Polly's is is their battery -- is almost perfectly flat so. If it's one point five -- is an example it's pretty much anyone point five volts for the entire -- hour lifespan of that battery. Now if you look at nickel cadmium and nickel metal hybrid that battery slope is much different. We different. Like a nickel a nickel metal -- slipping off much sooner right it'll slugger but it's always -- point five both students receive a point 31 point two of put him."

" One lesson forgo dues they whatever possible use rechargeable batteries and he argues disposable batteries please make sure they are properly recycle. Don't let them end up in a landfill which I think we're -- sort of -- bad -- era itself. So we're off to the other workshop of these things must -- six. So I appreciate three different ways to get power here USB devices okay. The first line it is the simplest but it's not guaranteed to work and probably only work about 50% of your USB devices."

" If you have something like a small motorists thing is really probably get a work. More complicated devices such as iPods may or may not work depending on what kind of voltage regulators they have built in to them okay. For all of these devices you're gonna need any female USB adapters now these come in different forms in this case. I've broken into Roger's desk in particular it is USB extensions and company in. Okay this is good and as -- showed the previous episode with the I headphone amplifier I really like to have a cable coming out of some things that we've got more range and play with it okay. He the other thing that you can news is you can use just aboard -- to bull. He don't USB plug okay so this is when -- personal things that depending on how you want to do it depends on. You know which he's when he's the port notable or whether you subpoena cable. So I'm actually going to take this USB cable and it just going to cut it using my leatherman. Square before this is one of the most useful tools on. -- this is from make magazine it cost like 2030 bucks I don't know exactly companies almost every day. It's gotten built is -- Knife blade it's got. -- wire strippers from multiple gauges and wire cutter it's gotten needle nosed pliers. Small scale Phillips head into. Regular flat -- it's really great tool is a great thing for your pocket so show you how to use this. Four -- project so the cut open. My USB cable and and give it a little bit more late. Here so I can have more better exposed wires and peeling back. The -- Cover of this to expose before wires -- a look at these this is an industry standard. That you're gonna see. Four different colored wires your gonna see the black the red to green in the way to degree in the white partnered. Are your positive a -- negative power cables. So we're just gonna need to black and the red power cables and so again just using list were before I would -- these open. Now what you've done that all you need to do is connect the black and be read to the black in the red cables your little. Battery pack put them together and now we should have he cleaned. Power source coming out of the USB adapter we -- have you reasonably clean. For half bolts coming through this which is not. Five volts so this is very important but this is really notice the dirty backroom kind of electricians job. If you try to do this before batteries you're gonna unit cleaned six -- which might short out. Your device okay. Every device is gonna be different so when you -- iPhoto or iPod. Or a little snow men sculpture or you're USB notes whenever -- might be. That's USB driver. If you give it more than five volts you might bird count the device. A lot of devices are actually house -- regulators built into -- and you want but I still don't recommend. Giving it more than five volts in this case for giving it forwarding. In testing this I found that my iPhone. Will not accept -- charge for example it needs a cleaner. Thicker power source McCain needs a full bibles how ever when it plugged in -- iPod. It did actually start pulling some clear through that. So depending your your device this Mayor -- work again this is the super quick and dirty so is really not your optimal solution but. If you're stuck in a bargaining to charge up the USB device over. This might work --"

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" For a second project we're gonna look at giving it a clean five volts which. It's. A much simpler project but. It's not gonna last as long as our third more complicated project but this is a project. That anybody can do with a soldering iron technically could do us soldering iron but it really would recommend it. But it will offer a very clean viable source for your project. The only thing you're gonna need more for the first project as you need a four cell battery holders he needs successful or higher you -- battery. And you're gonna need in five volt regulator okay these are called seven you -- it's a very very common component you can find and any RadioShack. Did you key moser. Generally six -- that let's say finals. And it reduces it to five -- in leaves that extra voltage off and heat so if you're putting it against the 36 will -- C source. That is gonna get a room to really hot towards the end answered very hot voltage regulator. But if you're just using a viable source or a sixfold source which is four double a batteries. It's not gonna be nearly that -- it's been given in Geary clean by Apple's warrior project okay it's only a little bit more complicated. Then the first version. But it does require a trip to radiation so let's look at this. Okay if you happen to have twisted wired pairs amusement if you don't it really helps to twist. Here wires together really helps to deliberately. So I'm doing isn't -- to black choir and slowly twisting me -- if you have a really long links a good tricky canoes you can put the two wire leads. In a cordless drill and then reload and it'll give unix type rap for it in this case we're we're only using two -- you really need to do that. So. Why reviewing this is to connect. Our wires to -- voltage regulator and again this is ghetto electronics 11. This really isn't how you normally do it but it for a quick and dirty commitment that this is this is it. Okay anyway. So this is our voltage regulator you'll notice it has three leads coming out of it. And basically what those leads are is is the first leading issue voltage in positive okay. The middle lead -- common ground and that's for both voltage in as well as voltage out. And then the final lead is four. Full page out so basically what you do you have to wires coming in which is you -- six or higher goals coming -- And then you have to leads coming code which you regulated. Five full supply kind of so now we're gonna take our little twisted wire pairs and we're gonna connect these would for in and look for out of machines two different methods of doing this. 12 with the nine volt battery and one with four double layers. What are things -- would always have is shrink -- OK you can get that from. RadioShack. He get a whole bunch of it for very little amount of money you know a bigger role that you'll probably ever using your lifetime for ten bucks. But you always want to use it to make sure that your electrical circuits don't short out a lot of people try to use electrical tape I advise against it because it's too hard -- round title components like going to be using. Ideally you would use. Good heat -- with your shrink wrapped me can shrink but you can also use a liar and a package that'll work just one. Right time and starting with the center ground position and that's because. It's the hardest to get that and so when you want to do first is among the hardest and and one of the easiest. So -- connected it any concealer publisher crap off to the side with both players there so that's after its art together we can put the -- crap. And protect the circuit. -- here's -- are."

" and then move them."

" Don't need too much so earnest little bit."

" you know. You know again using mind handing me QWERTY Reuter. --"

" Theoretically."

" Bring orders dude."

" Tune and pull up. Or. --"

" not only will this help ensure that there's no shorts in the circuit. Put it also strengthened the wiring so heart rate. And it's now. And so now -- can take the other two. And again this is really get a lawyer in little. If it doesn't be hurt curious what that -- over that is is that's also common ground. And heat sync so that is continuous with the ground wires it also acts as a heat sink to help lead off. All that heat is produced by going from. Whatever your input voltage is whether that's Nigel through 36 votes or six bolts down to five votes. And continue -- get electronics when one. Instead of using the proper tool which would be heat gun to -- pressuring tuning. And abusing a lighter now if you don't have he'd done actually a really good sixteen there watt or 1001 hair -- should work that you really want to use heat and this really is a bad tool that totally got its idea. And magically. See shrink tubing. -- And so now not only have you protected. The contacts but you've also strengthened the wiring a little bit because that shrink tubing gets thicker as it shrinks and so notes with -- more secure. Right so now always remember which is the in which is the out. We're gonna. Redo what we've done in the past -- and reconnect this and -- two different. Battery types you can do this with. And nine -- or with four double a.s or force Tripoli -- if that's what you want to go either way we'll work because now we're going from. Six volts which is too much power for you your USB device down to. A very clean regulated bibles with our seven unified voltage regulator. Now I'm not gonna -- of these together we're just gonna test with both the four double a.s and -- test but the nine mostly related to solder it. And in. TV show. I'm not sorry for your your home can murder you're gonna -- Okay before hooking us up the first thing Ireland is test to make sure we actually got everything. And -- circuit actually -- and using. Are handy dandy. Jean code 25 dollar multi metre and a test both. That input voltage as well the output voltage so -- and is. Hooking up here and seeing. It's kind of bonds which. Here's has announced Richmond street and on -- And we're giving them seven point eight -- out. And now we're gonna switch sides and wants to get from our little voltage regulator. Now showing at six point two volts now for those New -- Okay with simple electronic circus like this when you have no load against it no resistance whatsoever that'll that is always in here a little bit okay so even though that says six point two votes was actually goes into my ipodder whatever. It's actually going to be Bible's Genesis one of those things you're gonna have to learn to accept. Is that with no load it against -- volt -- it's always -- appear a little bit high you -- vulnerable to. Okay now and it continued mind really get a electronics private going to run. And inclusive continue to hook up you know black to black render and I'm gonna again test the voltage on the back end and AUSB device. So if you look inside. Our USB female adapter. There's going to be four leads there and basically the outside here. Arguable page positive and negative in the inside pair. Asia actual digital digital information in a -- so the only ones -- need to test against -- the outside to -- the insight new. Are your your digital information were not actually sending and receiving digital information for the future percent of system. But for now we're just sending power. So and they test using our volt -- to make sure that we're still getting that queen a full page coming out of okay. So now the final test of get a engineering gonna want this to hook up our USB mill plugged. And pocketing too. Serious Venus iPod. And implement those teachers testing. And magically. It comes let's try that on my iPhone and see how clean power regaining. Once again my iPhone does and likeness. Japan so depending on what device you're using is gonna depend on. You know what your results are. They'll swap this now with the nine volt conceiving of anything better but right now it's working for the iPod it's not working for the iPhone. Your results mean very especially depending you know you're USB device it were only testing against an iPhone three G. And an iPod in this test that -- as can Julian USB devices out there so you're able results are gonna vary wildly depending on what USB device for use."

" It's time for our Netflix sponsored movie ticket awake this week Hamlet two yes Hamlet two. Starring Steve Coogan and Catherine Keener is delightful comedy centers on a failed actor turned high school drama. Unfortunately the students aren't as enthusiastic about the arts he has. And looks at school threatens to shut down -- department the cooking teacher decides to write an original sequel to Hamlet involving time travel in the classic tune. Rock me sexy Jesus. If you're looking for a laugh -- times to him -- in your Netflix queue now. -- to forget to check out the other 89999. Titles Netflix has offered including Blu-ray titles. You're -- to find any title you're looking for plus with forty shipping centers almost all -- is happening just one business stay in shipping both ways is for -- you. Prosecute Xbox live gold member you can receive Netflix on -- viewing on your Xbox 360 that's right. No discs or mailbox is required your movies instantly streamed over your broadband connection straight to your Xbox 360. Plans start at 499 but as an assistant -- or you can get a free trial by signing up today yet Netflix dot com slash systems. -- So for our third version -- we're actually gonna use -- step up voltage."

" Converter calling from a lowly three volts to a very clean very powerful. Five volts. This project. Takes a little bit longer it's a little bit more complex it's definitely more costly but it's pretty much guaranteed to work with just about any kind of USB device you've got. Now you can buy a very nice printed circuit board for all of this stuff mean by lady yen at lady did not. Or you can go ahead with a hard we like him to do it here so we have an easel project. Either way will work just fine there's couple different ways of doing this the way I would be doing it is a lot like how we did the iPhone. Had booster thing that we did a couple of weeks ago. On it and using eight prototype and board. I'm getting lots of sauter bridges and things like that -- work. If you don't do that the lady -- a website we'll give you a very nice printed circuit board for a couple bucks which you know makes me feel like easier it's a tough. I would have Pickford through all the soldering and root as he works. -- Okay so now we're gonna soldering doing it the hard way using prototype in foreign. To put in the microchip and remember from our previous episode we always put the micro -- in last last last last last thing we did over soldering we tested over star points. Make sure there's no bad connections managers and everything's continuous -- Obama. Finally put in the microchip to make sure we don't destroy anything and opening an electric game. Please snapped as it slipped similar. The lunar batteries. The LED should actually only come on. If it's running out of power the -- low power only the indicator which is an option if you're making this project. Another final test is in the pundits it and see if it charges mine."

" It's charging get so this is so small and so compact it just like a previous episode it will fit into an all points -- If you want to be really cool you can totally combined the two projects in little -- tin. Doing both the headphone amplifier and the iPhone USB charger in one all points to an awful this. We're into off two double A batteries will fit just blurry and in the mini all points -- not the -- seal -- NC -- either way. So is is a great project and as you can see lake. They -- versions this is actually charging my iPhone. Lady in to have a big long laundry list -- her website of the things that this is guaranteed to work with -- not work with so you can go down there and figure out you know what's -- and whether or not you or USB device will work. And again an iPhone is a really high end device not terms of how cools functionality is but in terms of it's tweaking some things like that so. The other two devices that I built may very well work on you or USB device where you're USB phone it totally depends on. The power settings of the actual USB device excellent. I'm guessing that the iPhone really -- tweaks the kind of power that wants to make sure it's getting really clean power. Warehouse a lot of other USB devices such as the iPod. That worked fine with the other two devices. You know it's gonna very device device so if you need something for an iPod. Our earlier devices might just work fine where analysts. For the iPhone you're gonna have to go with you know that the voltage regulation circuit here okay that's it for. Our days project in you can actually see in the pieces that if you roll back a little bit. This charge my iPhone -- and fast so it's a good way to you know. Spend a couple hours and build -- circular a little bit more about electronics and adults something useful."

" All right let's go back to studio."

" You know what. Tekzilla hasn't released time I heard look at that now rose 6 PM eastern we PM Pacific -- they would be sure to watch this week's episode to get an insider's view of CS 2009. In the latest coolest and fun is here from the largest electronics show in North America including I suspect a lot of -- a lot of -- what matters is here. And rumor has it. In actual personal fuel cell you can carry around and -- cool and robot in more catch the action on Thursday January 15 at 6 PM eastern standard. As always if you got any suggestions comments or other things you know it's a system to version three. And there's of the forums -- platform and visit our archives division street com slash system about a Norton caucus we'll see you next week on system."