Servo tester is a useful little device that is needed specially when you do not have one. I've been placed in a situation like that few days ago what I was trying to connect ailerons with servos on my Depron plane and setup correct control throw. Luckily, I own a few Arduinos, so 15 minutes later I owned a divice like that:
It is an extremely simple servo tester based on Arduino Pro Micoro that can send 3 different PWM pulse lengths: 1000us, 1500us and 2000us. That gives min, neutral and max stick position on RC radios. Perfect to setup control throws and neutral positions.
- Arduino. Any Arduino will do. I used Arduino Pro Micro, but any can be used. Even barebone ATmega328 running internal oscillator on 8MHz,
- Tact switch,
- Some golpins to make servo connector,
Electrical diagram goes as follows:
Program is also not complicated:
And at the end, it works like that:
Source code is available on GitHub.