See video of the device operating here: http://www.pornhub.com/view_video.php?v ... 1058066694

Could somebody pin this?

The software sets the speed of the motor based on low pass filtered signal envelope from audio; so it is synced withthe audio beat.

The motor is 12V dc, the speed is variable, PWM controlled by the Atmel, depending by the audio that is captured from the ch video. The current can reach up to 6A so it needs a beffy transistor.

I used a buch motor I had lying around; attached some pictures of the first prototype.

I did some experimentation and developed hardware and software for a machine that strokes in sync with cock hero movies. Totally addicted to it! The biggest thing is it does not miss beats, does not tire, does not cheat! Prototype using a gear motor, some scrap wood, 12v power supply ...