Michael Eneros Posted July 13, 2011 Report Share Posted July 13, 2011 Hi i'm setting up a speed controller for my fuel pump. I have a simple pwm DC controller, witch i can set %Dutycycle and switch freq. The problem is that the controller need 0-5v analog input. And as i understand the PWM outputs on the G4 (extreme)Â is '0-12v' pwm. This means that i need to convert the pwm output to a analog output and convert the voltage to 0-5v. I think the esiest way to accomplish this is to first convert the PWM to analog with a simple RC filter or lo pass filter. And to get the voltage in the correct range by using a voltage divider. To calculate the components for the RC filter I need to know the output frequency of the FP speed function. Thoughts about this solution is also welcome as my electronic skills aren't wery good.. Â Regards // Eneros Quote Link to comment Share on other sites More sharing options...
Noel Cachia Posted December 10, 2012 Report Share Posted December 10, 2012 hi eneros to step down the voltage just use a LM7805 Cheers Noel Quote Link to comment Share on other sites More sharing options...
Simon Posted December 12, 2012 Report Share Posted December 12, 2012 Best solution would be to use a solid state relay and control the pump direct. Quote Link to comment Share on other sites More sharing options...
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