RC Servo Tester

Hobby RC servo tester:

  1. RC servo PWN generator
  2. 'Center' and 'Manual input switch
  3. Analog position input command for manual servo slew

When switch is in 'Center' mode, PWM is preset to move servo to center position (1.5mSec pulse width). When the switch is set to 'Manual' mode the tester reads the analog input (potentiometer) and sets the servo PWN to the requested position (between 1.0 mSec and 2.0 mSec).

AVR ATtiny84 code https://github.com/eyalabraham/servo-tester

Circuit layout

Inside view

Completed tester