Writing electrical circuits using a ballpoint pen

Posted on December 31, 2011 by John McLear

This looks like it could be really useful for teaching electronics.

One thought on “Writing electrical circuits using a ballpoint pen”

Amy1nug says:

January 6, 2012 at 5:08 am

Where can I get some? Love it!

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One thought on “Writing electrical circuits using a ballpoint pen”

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