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17 posts tagged with electronics and circuit. (View popular tags)
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High Power LED help.

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

Help me do the old USB switcheroo

I can't quite get to the bottom of a USB peripheral auto-switching circuit diagram. [more inside]
posted by le morte de bea arthur on May 17, 2011 - 13 answers

Circuit for headlight LED works, but I don't know why

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

How did you get involved in electrical hobby work?

I’m coming from a non-technical background, and would like to learn more about circuit design and electrical engineering on a hobby based level. How did you get involved, and what resources are good for beginners? [more inside]
posted by codacorolla on Jun 10, 2010 - 13 answers

Inverter redo

Can this circuit board be redesigned? If so, how can I find someone to do it? (also inverter, battery question) [more inside]
posted by Vaike on Jan 25, 2010 - 17 answers

howto convert a BMP file to a gerber file for PCB fabrication

What's the easiest way to convert a bmp of a simple one layer circuit board into a gerber file? Or...into a circuit board, I'd like to get them fabricated by a company, not sure which one.
posted by Charlie Lesoine on Jan 13, 2010 - 3 answers

I need help understanding FETs.

I need some electronics help - why is this FET not doing what I expect it to? [more inside]
posted by backseatpilot on Nov 17, 2009 - 17 answers

What's the best way for a Crackle Box-type circuit?

What's the best way to make a Crackle Box-type circuit (where the user touches and closes the circuit with their fingers)? [more inside]
posted by itchi23 on Mar 24, 2009 - 4 answers

Radio has no future! - Lord Kelvin

Where can I buy a discontinued 11C90 650 MHz prescaler? This is for reverse engineering a SR-2020 mystery receiver that a friend of mine has been working on. Any information on this will be very much appreciated. Bonus hand drawn analog circuit diagrams. [more inside]
posted by mikw on Mar 13, 2009 - 3 answers

Mic level vs. Line level FIGHT!

How do I build a microphone preamp for a Macbook Pro? [more inside]
posted by knowles on Jan 25, 2009 - 6 answers

gps module circuit diagram needed

can you help me locate a circuit diagram of a gps module on internet? [more inside]
posted by raphael19 on Aug 5, 2008 - 5 answers

BUZZ - I know!!

Electronics filter. Game show buzzer+. There are tons of simple game show buzzer layouts on the google. What I can't seem to find is an idiots guide to something that would allow you to take an input more complicated that a simple yes/no. i.e. interrupt + [string]. Any pointers?
posted by Jakey on Jun 26, 2008 - 3 answers

Not That Kind of Transformer!

ElectronicsFilter: How do I drive a step-up transformer to get hundreds of volts out of an AA battery? They're only 1.5v. [more inside]
posted by spacewrench on Sep 3, 2007 - 7 answers

Circuit bending for dummies

I have a simple Sony reel-to-reel tape deck from the 1960's that I'd like to install a speed control on. Since I have no electronics skills, can anyone here recommend an ace 'circuit bender' in the Los Angeles area? Thanks :)
posted by starscream on Mar 1, 2007 - 3 answers

Long life flashing LED

Any suggestions for a small, battery-powered flashing LED setup I can use for an outdoor mock alarm? [more inside]
posted by pallen123 on Oct 21, 2006 - 5 answers

Help me build a relay & timer electronics project please.

I'd like to trigger a relay that momentarily closes a switch based on the voltage of another wire. Maybe. I think. Please help me with this basic (I hope) electronics project. [more inside]
posted by odinsdream on May 14, 2006 - 6 answers

Recommend a book that will help me make simple electronics?

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

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