I would also need [a resistor] after [the transistor] to reduce the voltage for the actuator. Is this right?
Ok thanks for your comment. The mosfet looks suitable, I also found a few that were 100 volts 5 amps.
I have the transistor, the guy at the shop said I didn't need a resistor as shown in the diagram, as it's a driver and output module.
I found a h-bridge module, looks suitable.http://www.miniinthebox.com/l9110-dual-channel-h-bridge-motor-driver-module-for-arduino_p903443.html?currency=AUD&litb_from=paid_adwords_shopping&gclid=CL-sxcn-z8UCFVBvvAodApEAVgDoes this one support two motors, or does motor b ports give me the opportunity to reverse the wires to make the actuator go backwards?