I have just assembled and am playing with the Tinkerkit Braccio robotic arm: https://store.arduino.cc/usa/tinkerkit-braccio I can move the robotic arm with the braccio library from github. One of my issues is that, after the robot arm achieved its desired position ( e.g. not moving ), the motors …

High pitch noise from servo motors on a robot arm (Tinkerkit Braccio)

MarkT September 28, 2017, 3:39pm 3

PWM driven motors whine. Ultrasonic PWM can reduce/eliminate this.

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