For a halloween prop I'm building, I got my hands on a car door lock actuator... good fast, strong linear movement. Going to be used to make a prop jerk about.
Here's my issue... the actuator only has 2 leads. You reverse the in/out motion by reversing the polarity.
I'm trying to think of an efficient way to do it. They pull a lot of amps, so unfortunately it cant just be something simple.
Is there a device/method/system out there to reverse the polarity across two wires, then switch it back again at will?
The best I can come up with is a 3 SPDT relays... Relay1 sets Wire1 to Red, Relay2 sets Wire2 to black, and then Relay3 turns the thing on or off.
(I only suggest that because I already have SPDT relays)
Or I could buy a DPDT relay which would take care of 2 of the above, then use another SPDT to turn it on and off.
Is there an electronic solution to this without having to put 2-3 relays to use?
Thanks!