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This looks like an interesting project made with an Arduino and a laser pulled from a laser level. There are schematics and a video on the website if you want to try and make one for yourself.

After programming the Arduino, I took out the ATMega168 and wired it into a breadboard along with a 16mhz crystal and 5 volt regulator. For the receiver I used the phototransistor wired into two logic gates of a inverting Hex Schmitt trigger. I used the Schmitt trigger to act as a buffer and ensure only proper logic level enter the USB to serial converter on the Diecimila board.

Read more about how to make a Laser Modem with an Arduino Micro-controller

Marc de Vinck

I’m currently working full time as the Dexter F. Baker Professor of Practice in Creativity in the Masters of Engineering in Technical Entrepreneurship Program at Lehigh University. I’m also an avid product designer, kit maker, author, father, tinkerer, and member of the MAKE Technical Advisory board.


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