I'm basically trying to find something that can push a button for me. I want to be able to control it through code, just like you can with motors, LEDs etc.. via the GPIO on a Pi.
I want it to extend and retract fairly quickly (1 second or less) and with enough force to push a button - the button has slightly less resistance than a standard lightswtich.
I have no idea what to Google hence me asking on here!
I'm running Pi 2.