Thread: Windows Service that raises DTR on powerup

So you don't need hibernate trigger? Nice find.

Originally Posted by danielkh

So you don't need hibernate trigger? Nice find.

Not at all. Maybe its the way I have mine setup. I have a relay that activates when I turn the key or use my bypass switch to turn on all the components. In saying that, the TR-4 is hooked up the same way. So when I turn on the key, the device automatically waits 2 seconds, then turns on the amps. Without a program like A_C and V_A_C (im tired of typing them out), we would hear the thumps. When turning off though, the unit shuts off right away, no thump no nothing. Infact when I had it setup the old way, when I turned off my car i would still here music for 5 to 10 seconds after I have shut my car off. With this device the sound is shut off right away. Infact when I turned off my car I thought something broke because I am so used to hearing the music play long after I shut the car off.

PS: The input from the serial port can be any voltage and the out put voltage to the amps is 12V @ 2amps, more then enough for my 4 amplifiers.

Excellent find. I know there are some people here that couldn't get their amps to turn on because there wasn't enough current coming out of the serial port. Hopefully they find this post!

Originally Posted by danielkh

Excellent find. I know there are some people here that couldn't get their amps to turn on because there wasn't enough current coming out of the serial port. Hopefully they find this post!

loginfailed is the one that found it, so hes the man!!!!! Yes I agree, I would have went with 1 amp for my setup but space was such a mission for me.

Originally Posted by blbrchnk

Which color wire is the DTR wire in a serial cable? I tried white with the 2n2222 transistor and it doesn't seem to be working.

It depends on the manufactuer of the cable..... I dont think there is a set color... I tested to find pin 4 the ghetto way. i took a needle connected to a LED light that then went to the positive side of a battery. Then i connected the neg side to end of each wire. I then stuck the needle in pin 4 and then moved the battery along the wires on the other end till the light lit up... thats the pin 4 wire.

PS: dont make the 2n2222, just buy a http://www.buy.com/prod/pac-tr-4-low.../90129363.html, its so easy. I turn on 4 amps with this thing with no issues. You can find it on ebay for cheaper.

Originally Posted by BlackStealth

I find myself using this article frequently for disabling serial port scan and I'm afraid one day it'll disappear from the web, so I've captured it as a PDF file.
http://dast.freeshell.org/blog/title..._ports_serenum

I know this happens with XM, HD Radio and my OBD2 scanner, but this actually happens on the serial port with AMP_CTRL connected to it? Its the only serial device in my setup that doesnt act up.