I wanted to put my Minipov on something so it would be easy to see the persistence of vision. So I put the minipov board on a piece of flat aluminum and connected it to a 9 volt hobby motor.





Then put a model airplane prop drive adapter on the motor. I drilled a whole in the center of the aluminum and secured it to the motor with the prop drive adapter and just powered it with a 9 volt battery.

I added a hall effect sensor to the minipov so the minipov could sync up with the rotation of the motor. I used ladyadas spokepov code as a reference for how to sync with a hall effect sensor. The hall effect sensor is rated for 3.5 volts, but it will work at 3 volts. My batteries got a little low and the sensor started missing the magnet. It took me a while to figure out that all I needed to do was get a fresh set of batteries (I spent over an hour repositioning the magnet and sensor).

As the motor changes speeds, the program slows or speeds up the blink rate. Because I have the blink rate change in small increments, it takes a few revolutions to sync up.

My version of the C code. largeimage.c.

There is a little bit of chop in the video, but it looked clearer watching it in real life.

As the video starts, the leds seem a bit random, then the word "Chad" comes into view. This is minipov starting to sync up. I have the blink rate change incremently. After about 15 revolutions it is pretty well synced up. In the video you can actaully tell when the arm is sweeping around. With the naked I it looked smoother.