Tag Archives: raspberry pi

The electromechanical relay clock project is complete!

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CLICK HERE TO VIEW THE PROJECT WRITEUP!

After years of waiting to find the right hardware, I have finally found the time and the opportunity to build my own digital mechanical clock that uses absolutely no transistors or ICs. Its technology is reminiscent of the early relay computers from many decades ago. It uses 67 relays arranged in such a way to create 21 identical flip-flop logic circuits.

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Using the Arduino AJAX Webcam to Monitor and Control Your 3D Printer

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It’s a simple idea. Just modify the source code from our Arduino IP Webcam project page and add an additional set of AJAX response lines that toggle a couple IO pins on the Arduino. You can have these pins go directly to some headers on your 3D printer and/or to an inline power-switch tail that you can toggle in the event of a problem. All the while monitoring your 3D printer visually with a live image feed from anywhere on the World Wide Web.

Heck, while you’re at it, you might as well add some remote controlled lighting, and a relay shield. Your only limit is your imagination RAM. Check out this simple user interface:

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