Scrappy Arduino Pen Plotter with Nema17 Steppers

After seeing a really neat commercial Pen Plotter on Youtube, I decided the time has come to build my own Arduino Pen Plotter using Nema17 Stepper Motors and readily available 3D Printer spare parts.

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The Quest To Get A Machine To Juggle

This entry is about the quest to get a machine to juggle a ping pong ball.

I started thinking about a ping pong ball juggler 2 years ago. And it was around that time that I built the first one of them. it uses LED – Photo transistor pairs to “see” when and approximately where the ball comes down. I used 4 micro servos to move a wooden plate.  It’s the machine in the first YouTube video.

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