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.
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posted by gagoumot
on Aug 2, 2012 -
2 answers
I bought a few strands of cheap LED Xmas lights this year. They include a circuit box with several settings to make the lights flash in different patterns. The circuit box resets itself (to a new annoying setting) each time the lights are unplugged or when it shorts out in the rain, and I also suspect the box is the product's "built-in expectancy" (since otherwise LEDs might last too long to be profitable. Can I bypass the box?
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posted by Shane
on Dec 21, 2011 -
8 answers
I'm looking for a way to dim LEDs on computers/electronics without completely darkening them.
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posted by PCjabber
on Aug 23, 2011 -
19 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?
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posted by jjjjjjjijjjjjjj
on Jan 18, 2011 -
6 answers
Battery and blinky light gurus - help me power my LED jacket! It apparently loves to eat batteries.
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posted by cr_joe
on Jun 14, 2010 -
5 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.
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posted by jjjjjjjijjjjjjj
on Nov 18, 2008 -
28 answers
I have a question about persistence of vision and flashing lights... There will be maths and biology involved.
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posted by twine42
on Feb 6, 2008 -
3 answers
I need to purchase 30 to 50 orange or red LEDs by this Friday. Where can I get them as cheaply as possible in/around San Francisco?
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posted by agenais
on Dec 5, 2007 -
10 answers
It seems that taillights have evolved rather radically from their humble origins, now featuring LED configurations spanning cars' entire back ends. Why hasn't this kind of innovation been seen with headlights?
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posted by limeonaire
on Nov 25, 2006 -
15 answers
