How do I measure AC current (0 - 7 Amps) using a microcontroller?
I know how to design microcontroller circuits using PIC/ATMega processors but my analog experience is lacking. I understand I can use a transformer to transduce the current going through a cable, or use a Hall-Effect based transducer in a similar fashion. How do I scale the output voltage of the transducer (DC in the Hall effect, and AC in the simple coil) to match the -VRef to +VRef swing of the A/D converter built into the microcontroller? The only thing I know about analog circuits is "ground" is the place you grow roses...
David, Melbourne, Florida