A colleague at work wanted a clay target thrower remote.
His had a foot controller with cord, he wanted it to be cordless.
I used this simple Remote Control from DX.
I just modified the transmitter and put a more powerful button you can press with your foot. And an outlet so that you can connect eg a pedal.
The receiver is battery powered and can easily connect to the thrower.
When you press the button on the transmitter a relay closes on the receiver and a clay target is thrown.