I am trying to measure the ground speed using an ATtiny13.
The real problem is that I canot understand the functionality of the sensor that is on the truck.
The sensor is a magnetic sensor near the motor gear. It counts while the gear is turning. I am trying to undersyand the functionality using my meters but I can't.
Does anybody knows how it works, I mean what is the type of the electrical signal or if it is just a contact.
thank you very much.