03Vic-HPP said:
I hooked mine up on the bench using a 12v power supply prior to installing it in the car and watched it pulse 12v then pass through 12v....not that I didn't trust you or anything, just that I had to see it myself before hooking it to a HU that cost almost 2k lol. Like I said before, works like a charm!
Dude, no problem, no offence taken. Really... in fact I'm glad that you checked it. You guys don't know me and I could be a sick person and made these to blow up units for some sick joy or something (I didn't, I might be a sick person, but this circuit does work).
In fact if you actually hook a function generator up to the input which switched between 12V and ground at 100hz - 900 hz, it will output 12 Volts as well, to take care of different cars possible difference in dimmer wires.
And did you try hooking the input to 12V and apply power at the same time, the output still flashes and then after 10 seconds the output goes to 12V and stays there while the input is 12V.
It's actually quite smart. And I actually design medical electronics for a living. Stuff I have made had been implanted in people. I make low power circuits and software for embedded devices for a living, so this wasn't that hard. And I even had some of my co-workers code review the processor code and check the circuit. It should be quite robust.
There is a possibility that there is a car out there that functions differently than I anticipated. Worse case in this situation, is that it will still flash the lights and the Z1 will have full functionality, but the dimmer will not react to turning your lights on and off. It's possible, but I'm pretty sure that just about any car out there will work with this. Again, if your car doesn't "work with this circuit" it means the Z1 will be bypassed but it won't dim with your lights. That's the worse case, but I don't think that anyone will have this, I'm pretty sure I took care of any car's dimmer functionality with this circuit and if you are one, hook the input wire to a line that goes to 12V when you turn your headlights on, and it will work too.
When installing this, I would recommend taking the 12V switched and ground off the wire harness of the head unit. Don't take the 12V switched from somewhere else in the car, who knows, maybe your car powers up the radio at a different time from something else (there might be 12V switched that turns on before the radio's 12V switched is powered up, I don't know of any cars that do this, but they could exist). To be sure take all the wires for this circuit from the wiring harness of the radio. That will ensure proper timing and operation.
Good luck guys. Please let me know how they go. If you have trouble PM me and we will work it out.