I am sure this is very very simple circuit. I need to convert a PWM =
signal from a PIC to create a +4v to +7.5V DC control voltage. I am =
limited to a 8v 0.5a max power supply. I have been reading that i need a =
low pass filter and an op amp. But I really need specific parts and a =
circuit digram. And basic description on how it all works would help =
greatly.

thanks,
Frank

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