A similar thread was started on 06-05-2009, 08:27 AM. I have the same question and there is not an answer.
I am trying to make an automatic control system for a 12v dc motor.
The system will open a hinged door in the AM with a 120v timer. The timer will only be energized for 30 minutes each time it is activated. The door will close when the timer goes off again in the PM. The motor is connected to limit switches to stop the motor at each end.
How do I reverse polarity with a dpdt relay? I am having a hard time getting my brain to think this though.
Thanks.
I am trying to make an automatic control system for a 12v dc motor.
The system will open a hinged door in the AM with a 120v timer. The timer will only be energized for 30 minutes each time it is activated. The door will close when the timer goes off again in the PM. The motor is connected to limit switches to stop the motor at each end.
How do I reverse polarity with a dpdt relay? I am having a hard time getting my brain to think this though.
Thanks.