Motor type / Arduino control
I know such a thin exists but am not sure exactly what it's called.
Basically it is a motor but instead of rotating a shaft it make the shaft go in and out.
It doesn't need to apply much pressure just a little tap.
I thought it might be called an actuator and is similar to a solenoid I suppose.
Any idea where I would find such a thing, what it would be called and how to control via Arduino.