percyt2k

When I turn on my mp3player in the car, the amps have already been powered up by the remote switch wire and as the motherboard initialises the soundcard, the subs nearly jump out of the boot (trunk)!!!

I've seen on here a member (called OMS) has a program to put DTR to high to switch on his amps - but as his system is Linux, he's told me he can't help.

What I need is a program (or batch file) that when put in the startup menu will put DTR to high which will trigger a relay between DTR and ground and then it will turn my amps on. Then, when the system is shut down, the program ends, the relay opens and turns the amps off so that the motherboard doesn't 'thump' them

Can anyone help???

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Best regards,

Darren Thrower
http://www.percyt.com/mp3player.htm

MP3Car.com

 

SkinnyBoy

Or you could just have a time delay on the speakers of about 5seconds, so when the computer is powered, so is the amp, but the speakers aren't connected for 5seconds or so, so you won't get the thump..

percyt2k

But that won't help with the shutdown - i'll still get the thump when it shuts down.

__________________
Best regards,

Darren Thrower
http://www.percyt.com/mp3player.htm

cj

Try perl and some kind of script using this module.

percyt2k

If I was a developer, then I wouldn't have had to post this request in the first place!

Please please - someone must be able to help me - I don't want to damage my ICE!!

__________________
Best regards,

Darren Thrower
http://www.percyt.com/mp3player.htm

enlight22

ill throw together a program in C if you want, email me, zodono@hotmail.com

radioman193

The shutdown POP is your soundcard powering down you will need to power down the Sub amps first and that wont happen.
AMPS LAST ON AND FIRST OFF.

OR just put a switch on your Remote line
then just switch the amps on After the Pc is booted up!

[ 12-16-2001: Message edited by: radioman193 ]

Rob

I take it your using windows, if you are there is a simple C command called outportbin the dos libary, which you can use to write to a directly to a port at bit level.

Bellow is a crude example to turn all the data bits on a LPT port to high.

include <dos.h>

void main(void)
{
outportb(0x378,127);
}

To change the DTR all you have to do is change the address. I only used the LPT port as I couldn't rember the address of the DTR.

An on and off program like to one above could be quite easily called from a batch file.

I hope this helps a bit.

Rob

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