Shows Schedule Inside Revision3 Store

Go Back   Revision3 Forums > Archived Shows > Scientific Tuesdays

Thread Tools Search this Thread Display Modes

Old 09-15-2011, 05:17 AM
Join Date: Sep 2011
Posts: 1
Status: Offline
Default [Help] USB Illuminator

I need some help with the USB Illuminator, I have two major issues.

One, i can't get my hands on a 3v LED, only lesser. Is there a a converter to see what voltage i have, mixed with the correct ohm on the resister?

Then an easier one; I would also like to add a switch into the mix, what is the best way to do that, and where in the circuit.

Hopefully you guys aren't too busy to read this, I really would like to get this up, it's the perfect college nerd's accessory .

Thanks for reading!

Mark Mina.
Reply With Quote
Old 09-20-2011, 07:55 AM
Join Date: Jul 2011
Posts: 3
Status: Offline

i made a flashlight using an old cellphone charger
i still want to make the lamp dut i dont have the type of DVD (i only have a cd that looks like it)
im using
3.3 volts (typical) and 3.6 volts (maximum) 5mm high brightness white LED purchased from radioshack
15 ohm resitors 1/2 watt 5% tolerance
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT. The time now is 06:17 AM.

Rev3 Forum RSS

© 2005-2010 Revision3 Corporation