So, I did an electronics test. Mechanically everything is going very well, and I expect no problems. But so far, on the electricity side of things, I am stuck.
I went to the store today to get what I thought were the last components of managing the current to the motor. I wanted to get diodes to install inline in between the adapters and the motor to prevent current from running from one adapter to another. Since I am using two timers, and two adapters (representing an open and close door), with opposite polarities to the motor, I need something to keep current from flowing back.
So, the guy at the electronics place showed me these diodes. I just took his word for it and got two. He recommended running them on the positive wire.
It is a silicone rectifier diode.
There is a cathode band set to one side on the small cylinder. It represents the direction you want the current to flow.
The way I understood it, was that it would prevent current from flowing back.
Well, it did not work the way I expected. When attached to the positive, the motor did not work. So I switched it to the negative. everything went great. Then I used the other diode on the other adapter (negative line) and even without current, when I put the wires on in opposing polarity, the motor locked up.
The objective is for me to be able to have wires from both adapters connected to the motor in opposing polarities. The timers will control the current to only one adapter at a time, based on the desire to open or close the door.
Anyway, if anyone has any ideas of how to prevent this interference, please let me know. Even when the second adapter is unplugged, if the wires touch in opposite polarity, it interferes with the motor. Hmm.
I don't know why the diodes didn't work as planned. Maybe there was a misunderstanding at the shop.
I understand what he was thinking when he said to use 2 diodes. But it wont work. You have power hooked to the same terminal as the ground of the other adapter. You dont have power back feeding in to the other adapter. Its feeding forward from one hot to the other ground. If you block that with a diode the you also block forward flow from its on hot wire.
If you used two separate batteries wired threw relays then it may work. Use the same wiring you have now to power the relays in place of the motor. The relays then connect the hot (and ground if ya get duel pole relays) wire from the battery to the motor. Because the battery's are separate systems it should work.
If you use 2 dual pole relays to power the motor so you are switching both the power an ground then you could run it off one power source.