dramrattan
Member
Hi,
I found the circuit attached that suppose to detect when a phone is ringing and the number of times the phone rings...The part of the circuit which has "to counter"...is that going to the PIC microcontroller or something?...Which pin would it need to be connected to on the PIC18F452?...Or is there another chip which determines ring count seperately from the 4N25? I completely lost
I found the circuit attached that suppose to detect when a phone is ringing and the number of times the phone rings...The part of the circuit which has "to counter"...is that going to the PIC microcontroller or something?...Which pin would it need to be connected to on the PIC18F452?...Or is there another chip which determines ring count seperately from the 4N25? I completely lost