Need code for controling hardware-dashboard

Don`t know wether I`m on the wrong track right now but maybe some guys can have a look into what I´m after:

I want to control a real dashboard, mainly tach, speedo and temp gauge. In the Wiki I`ve found several ways to do so but I though about something more simple. I`ve got me a nice dashboard with fully electronical gauges, means no mechanical input whatsoever. The gauges need a square-shaped signal of 5Vss ranging from 0 up to 500Hz- this should be easily to obtain from any soundcard or onboard sound controler. So why using shrieking servos to control gauges?

So what I`m looking for is somebody who`s able to convert the software code which can be downloaded from the Wiki/projects section in a way that the soundcard doesn`t output PWM anymore but rather a simple FM rectangular signal in an adjustable frequency range like mentioned above. Unfortunatly I don´t have any knowledge about Delphi or other computer languages so I need the help from somebody else on this!

Would be great if somebody is willing to take a look, if I`m wrong in my expectations please answer as well and tell me why it would be the wrong way!

Any help would be nice,

CU,
Wolfgang

Look here:
http://www.symprojects.com/

I try with Arduino board but too complicated for me :

Hello Jadran,

thank you for your answer! I`m familiar with that company but thought I could save some bucks by just using a simple soundcard and some code...... I`ve tested my dash and it turned out that it needs 3.1kHz to equal 280km/h, simple rectangular waveform, 5Vss. And here´s what made me think about my project: I`ve done all this testing using a little programm which turns my soundcard into a tone generator! I´ve downloaded it for free on the www- so the missing link is just some code that modifies the relevant data from the sim to control my soundcard, that´s it.

I guess Sirnonname has already done something very much alike, but unfortunatly he modified it in a way to control noisy servos which IMHO is a progressive way to march back into the past.... :thbd:

Wolfgang