Automotive Power Loss Annunciator Answered
The photo shows what I'm dealing with: a sound module ($2.50 including shipping from China) and an automotive auxiliary power cord (cigarette lighter.)
The sound module has a "play" button at the end of the yellow wires.
The "black box" has two tasks:
- detect loss of power on the 12V cord
- momentarily connect the two yellow wires (as if the button switch had been pressed.)
So far I’ve been told that some sort of relay and a timer could be involved, but since I’m not a Electrical Engineer, I don’t know the specifics. I know that in the automotive world, there are big, bulky relays, but I'm wondering if there are relays in the integrated circuit world?
I really need specifics like part numbers and circuit diagrams. Thanking you in advance for your help.