I want to use an arduino to activate a two-wire actuator (automobile power door lock mechanism).
The actuator runs off 12 volts . When power is applied, the actuator flips in one direction. If you reverse the polarity on the actuator and apply power, it flips in the other direction.
I only need it to flip in one direction, so I am not worried about the polarity reversal (I will manually be moving the actuator to "lock" it).
However, I believe I need to use a relay to power the actuator since I am running off a 12 volt battery, and this thing will be plugged in 24/7.
I dont want 12+ volts powering the arduino since I believe there may be heat issues, but I also want to send the full 12 volts to the actuator.
Am I right that I need to use a relay in this situation. Can you give me a recommendation for the type of relay to use?
Thanks for any help you can provide!