Hello Good People
I have a car door lock actuator (central locking) that uses 12V to energise. I only have 24V available. What would be the best way to switch the 24V to energise the 12V actuator ?
(PS. I have tried to build a circuit which uses a relay (24V coil) and then in turn reverses the polarity of the 12V supply from + to - and vice versa. Problem is my 12V supply, I use a 7812 +12V DC Regulator from the 24V to supply the actuator. Look like the current drawn by the actuator is around 3 AMPS!. The Regulator gets VERY HOT.
Any help or ideas appreciated.