[Poita (Peter)]

I have a little project where I need to keep a system rotating at a fixed rpm.

We are talking around 20 rotations per second, nothing too fast.

The system has a manually operated brake, and we use this currently to adjust the speed, with a camera trained on a mark on one of the wheels, the camera refresh is set at 25 frames per second, and we just sit there for hours adjusting the brake to keep the mark in place. Could also use a strobe light I guess in place of the camera.

I'd like to automate this brake process using something like an Arduino, but not sure where to start.

Any ideas?