Quote Originally Posted by igeorge View Post
The pic is supposed to monitor 16 heaters. Can be done with a multiplexer, but my boss wants a visual LED for each burned heater, so in this case i decided to have 16 separated inputs. He wants the leds to represent the status of the inputs. He does not believe in multiplexing .... and he sign my check also

No, that bit is clear...what I'm getting at is how are you going to have the PIC 'monitor' (ie what's the PIC gonna be looking for ....a DC level? - therefore ADC, comparator, a small AC signal? therefore ADC to extract a non zero level)....you mentioned comparators....you mentioned RMS to DC converters .....a bit more clarity on your anticipated approach at the PIC itself will help everyone help you towards your end goal.