I would like to learn more about electronics and circuitry by making a LED light panel. I have questions about how to calculate the number of LEDs I need, soldering, and how to diffuse the light.
[more inside]
posted by gagoumot
on Aug 2, 2012 -
2 answers
Electronics help. I'm looking for a good informational/tutorial web site for working with high power LEDs 5 Watts and up.
[more inside]
posted by Eekacat
on Oct 23, 2011 -
11 answers
It's been cold recently (-15C) and I burned out two bulbs in my dutch bike's headlamp in a short time. Since the bulbs are hard to find, I thought this was a good time to replace the bulb with a 1-Watt LED light. What I built works, but I don't quite know why.
[more inside]
posted by kamelhoecker
on Feb 20, 2011 -
9 answers
I'd like to use a single 5mm UV LED
(3.4Vf, 20-25mA) to charge a daub of glow-in-the-dark paint. It only needs to be lit around 1 minute of every 10 (or 6 seconds of every 60), and only when the (room) lights are out. What battery/circuit would be most economical to operate, and require the least-frequent battery changes?
[more inside]
posted by jjjjjjjijjjjjjj
on Jan 18, 2011 -
6 answers
I want to create a customized
Settlers of Catan board. For the purposes of this question, it could also be a custom Monopoly board. I want the pieces ( cities / hotels ) to light up when they are placed on the board. I know I would put LED's in each piece, but besides that, I am not sure if or how I could power up the LED's. I am not an electrical engineer, but magnets, watch batteries or
inductive charging sound good to me. Help me make an awesome electronic board game!
posted by jasondigitized
on Sep 4, 2009 -
8 answers
Electronics/LED Folks: I bought a few cheap, poorly-assembled LED
color-changing orb-things and I'm pretty sure they're the coolest objects I have ever owned. I
cracked 'em open, and damned if I know what is going on in there, but it looks simple/cheap as all hell. Help me figure it out, I'll post a build-log/parts list somewhere, and in short-order
we can all be ass-deep in home-made, disarmingly sublime mood-lighting.
[more inside]
posted by jjjjjjjijjjjjjj
on Nov 18, 2008 -
28 answers
Where around socal can I meet other aspiring electronic do-it-yourselfers? [backyard imagineering]
[more inside]
posted by tarthur
on Jul 19, 2008 -
6 answers
I'm looking for a simple, small and cheap way of measuring acceleration. Basically, I want to make a set of LEDs light up if they are accelerated significantly, becoming brighter the faster the acceleration happens.
[more inside]
posted by Zarkonnen
on Nov 13, 2007 -
13 answers
Need some help designing and building LED light strips for an interactive table -- help me select 880nm IR LEDs, understand the circuitry, and figure out how to deal with power.
[more inside]
posted by warhol
on Mar 3, 2007 -
23 answers
ElectronicsFilter: How can I drive a LED as a light-emitter *and* a photo-diode simultaneously?
[more inside]
posted by stungeye
on Feb 15, 2006 -
30 answers
After a trip to BestHongKong, I find myself with 1000 5mm red LEDs. What should I do with them?
[more inside]
posted by Neon
on Apr 20, 2005 -
10 answers
My little boy wants to be a robot for Halloween, and I'd like to include a 60's style bank of randomly blinking lights on his robot chest. Cardboard and spraypaint I know and can work with; electronics, not so much. Is there a fairly easy and cheap way to do such a thing?
[more inside]
posted by crumbly
on Oct 26, 2004 -
8 answers
I want to learn how to make simple electronics, like LED controllers that I can hook up to a serial port. Can anyone recommend a book to get started with? [more inside]
[more inside]
posted by krunk
on Aug 29, 2004 -
13 answers
Electronics filter: Need to build something that'll light up different LEDs via radio frequency. Must be compact and battery powered. My electronics-fu is pretty good, but I'm not sure it's this good... [mi]
[more inside]
posted by SpecialK
on Aug 9, 2004 -
16 answers
