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Does anyone know of any good free software for designing simple electrical diagrams?
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If you mean schematics and boards, a lot of people here use the free / light version of Eagle:

http://www.cadsoftusa.com/downloads/freeware/?language=en

Good luck!
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Keep in mind that "good" and "free" don't always work together.
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KiCad is open source.  The free version of Eagle is limited to 2 layers and 100mm x 80mm boards.
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expresspcb.com is really handy for drawing up simple things for discussions.

Eagle from cadsoft for designing boards.

I use both, depending on what I am doing.



* Bare_min_Eagle_sch.png (11.09 KB, 820x414 - viewed 14 times.)

* Bare_minimum_uC.jpg (66.33 KB, 960x720 - viewed 16 times.)
« Last Edit: January 04, 2012, 11:17:11 pm by CrossRoads » Logged

Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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upverter.com  is nice if you want to draw a schematic and share it, but don't want to install anything.
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expresspcb.com is really handy for drawing up simple things for discussions.

Eagle from cadsoft for designing boards.

I use both, depending on what I am doing.



x2 on express pcb. fairly intuitive and easy to make new  components. not professional grade but for free software it very nice.
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Easy to make nice boards with expresspcb too.
Here are boards I made with epxresspcb (before I finally gave in & learned how to use eagle & wade thru all the libraries to find parts).

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Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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