I was just about to post something along these lines... I'm interested in integrating some stuff into my carputer... locks, windows, and the like.
I'm just trying to wrap my head around what hardware I need in order to perform certain functions with my CarPC.
Basically, I NEED to control my amp and signal it to turn on via the remote lead and I've pretty much figured I need a relay card for that so that I can switch the required 12v from another source.
But for controlling windows, locks and such other things, do I need a relay card or will something with digital outputs do? From what I've found in researching this, it depends how the car is wired up? ie: if the window switch is wired to + or -. If it's + then I need a relay, if it's - I can use a digital output?
I think I've got it sorted, I'm just hoping that someone that has done this before can give me some difinitive info before I go and purchase the parts.
Parts I am looking at are:
as an IO interface.
as a relay interface.
I'm already writing my own software that will have a plugin to do this sort of stuff. Already have MP3s, vids, a basic GPS plugin and a menu system working (altho not pretty, need to implement skins) and the next one I want to write is some kind of car control/monitor thing.Originally Posted by 0l33l
Originally Posted by 0l33l
I figured it'd be easier for other developers to write their own plugins if i used VB. Creating ActiveX Dlls to use as plugins is a sinch and the API i'm coming up with makes it a breeze to implement new features.
Take a look at this card before you go to a phidget.
I am writing a program to control it myself, and by the time the card is released, I should be finished with the program.
You can use a relay if the windows are negative controlled. You just have the switched side running to ground, instead of running it to positive. Either way you can use a digital signal.
The neat thing about having a relay card is that all your digital signals are interpretted by the card, and sent to the correct relay. With the way any of these cards are set up, you can just ignore a relay, and use the switching signal as a 'digital' output. You just have to adjust the voltage level, or perform some slight alteration.
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