> So, figure out what dwell percentage you need to run the PWM signal at to > equal or slightly exceed the volume of the original compressor, and let the > ACC turn it on and off instead of trying to modulate it? That would at least > equal the original intended performance with a very simple circuit. Wouldn't > exploit the full ability of the compressor, but would make the car better > than new.
That sounds simplest. I don't know what current requirements the PWM to the compressor needs, you may need to put a transistor amplifier on the output of the PWM generator. The beauty of the 555 is that it's dirt-simple, cheap, easy to use, and runs directly off 12V. No regulator, no programming, no problem. -- Jim _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
