Circuits.io
Circuits.io
<a href='http://makezine.com/2013/09/09/autodesk ... sign-tool/' target='_blank' rel='nofollow'>http://makezine.com/2013/09/09/autodesk ... n-tool/</a>
Breadboard emulation including Arduino, free for open projects. Once it's working you can get a board etched.
There are other free design packages, but I don't know any that include emulation.
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<div class='signature'> <img src='http://myanimelist.net/signature/JJW009.png' border='0' alt='user posted image'> ??? <img src='http://imagegen.last.fm/LastfmMyspace/oartists/5/JJW009.gif' border='0' alt='user posted image'>
Breadboard emulation including Arduino, free for open projects. Once it's working you can get a board etched.
There are other free design packages, but I don't know any that include emulation.
--------------------
<div class='signature'> <img src='http://myanimelist.net/signature/JJW009.png' border='0' alt='user posted image'> ??? <img src='http://imagegen.last.fm/LastfmMyspace/oartists/5/JJW009.gif' border='0' alt='user posted image'>