Review on 🔌 PAC TR-7 Universal Video Bypass Trigger Output Module - Black, Compact Dimensions of 1.5x6x5.5 Inches by Joe Vazquez

Along with written instructions, online materials and the like, this is a very functional and neat device that is easy to use. Various applications are mapped to configuration numbers that you "program" with pulses. brown wire to ground when 12V power and ground are applied to these wires. It's not exactly an obvious process, but with a suitable 12Vdc power supply (or slightly more) and a morse key (or similarly functioning momentary switch) to create the "ripple" it's easy enough. Incidentally, the pulsing LED is located on the circuit board inside the housing; When it's on, you'll know it's glowing brightly from within. It's not documented anywhere that I could see, but it's obvious once your config setting works. Another downside is that my Application #19 "Marine" (parking brake override for Pioneer Car Audio) required (only) a five pin relay to reverse the polarity of the output, not via power; This more than doubles the space required and the resulting solution is somewhat awkward, albeit acceptable, when tucked behind a console. For applications where relays are not required (probably in most cases), the device is small enough to be very handy.