Controlling a servo with the phone's headset jack

published May 09, 2015 01:25 by admin ( last modified May 09, 2015 01:25 )

Untested by me, but could potentially cut down on the number of components.

Controlling a hobby servomotor is relatively easy. It requires a single digital pulse-width modulation (PWM) signal at 50Hz, which means one pulse every 20ms. The width of the “high” pulse sets the absolute rotation angle of the servo.