Thread: Windows Service that raises DTR on powerup

Salvi,you've got a Pm.

Is there anyone else who can help me get this working?

When i run InstallUtil it closes instantly so i can't enter the command line.....
I spent 9 hours on this yesterday and got nowhere,i'm totally stumped.

To anyone creating software......

If your gonna post your work don't assume that the bits you leave out of the instructions are irrelevant.............DOS...........that went out with the Ark but it's assumed i will understand how to navigate to a given folder in that poxy black screen........and all you put is "when you get to that folder type this" well thats a great help.

Originally Posted by Nerd2

Why don't you try googling "How to navigate using the Command Prompt" or something similar to solve your problem?

A manual can be infinitely detailed. You've got to stop somewhere.

I'm not lazy,I did google for it but it didn't return anything i can understand.

Never mind, i give up,stuff it.

Originally Posted by ticketmagnet

I think using the DTR signal is a great idea and I wanted to give some input:

1) If you search carefully, you should be able to find a 5v reed relay with a high coil resistance. I had one with 1050 Ohms and it works driven directly by the DTR line. This dropped the DTR line on my carputer from 7V to about 5.8V. These are typically low-current contacts, which is perfect for the remote lines. Plus, the remote line is still isolated from the PC. Simple is better.

2) Serial ports go crazy as Windows intitializes them. This might make the amps flip on and off right as windows is coming up. Windows could be intitializing the sound card around this time, too. I am going to try a simple RC lowpass on the signal going to the relay coil so that it takes like 1s for it to switch.

3) Some have commented that they can't use the software featured in this thread because they use the serial port for something else. In this case you are even better off than those with free serial ports because you don't have to install the software and you can still use DTR. It doesn't matter what software is using the serial port. If it is being used, you should get a DTR signal after that software initializes. You just need to make sure that software starts at windows start up (and not "on-demand" later). The only difficulty is the wiring.

4) To prevent turn-off thump, I am powering my amplifier remote lines through switched ignition. That is, IGN --> reed relay --> REM. My computer shuts itself down when ignition goes down, but the amps will already be off.

ur a newb...


basicly take the DTR and run it to a 12v relay if your scared. That way the computer will make the relay switch to a constent 12volts and your amp will be happy.

DTR works great honestly with hibernate and i never hear a pop.

Originally Posted by ticketmagnet

Super. I'll just take a 12V automotive relay and connect it to my serial port, then. Thanks for the good advice, the compliments, the careful spelling and great grammar. I'll try to make my posts more like yours and not so newb-like in the future.

haha tight i don't care how i type its not in mla format and its not a essay ....