The author found that “Tower Pro Micro Servo – SG90” motors were prefectly suitable. The two servos (Left and are Right) are driven by the D6 and D5 outputs of the Arduino, in connection with the ...

An Arduino is used to determine the servo’s current position versus the desired position, and it turns the motor accordingly with a BTS7960 motor driver.

[Frank Herrmann] had an interesting idea to turn a geared DC motor into a servo motor assembly, but with a stepper motor-like interface. By stacking some small PCBs behind the motor body, it was po… ...