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PIC Controlled DC Load

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chevymn1964

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Hey everyone.... Im working on a new one now and I just wanted to get some input.... Ive been thinking of building a "dummy" load for test. I am thinking of using a PIC16F676 to read and display voltage and current... I was thinking of using the pic to limit the current by using PWM and shunting a MOSFET through a limit resistor to ground. But I dont know it the PIC would be fast enough to read the ADC's for curent & voltage and display it on a LCD then run the PWM? Would I be better off using a PIC with a built in PWM? Any ideas?
 

If you have to ask, then you probably should. The '684 is pin compatible and has PWM. I would use it just to keep my stock simple- keep the best of every pin count. On the downside, the '676 is nanopower capable but the '684 is not.
 

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