The Sno (pronounced like “snow”) board is a tiny footprint Arduino board that you can see ... there are modules to do analog to digital conversion, servo control, operate NeoPixels, and ...

Then, an Arduino board might be exactly what you're looking ... It also works with most of the popular libraries like Wire, SPI, and Servo. The Uno Rev3 is priced at $27.60. Introduced along ...

The Arduino controls what amounts to ... It is possible that a small servo moving a permanent magnet closer to the board for a move and away from the board to reposition could do the same job ...