khansaab21
Advanced Member level 4
Hello
I want to measure a analog voltage (as high as 220V) from micro controller (PIC). Yes i will use the built in ADC of micro controller and a potential divider to bring down the voltages within measurable limits, but, the problem is, how can this analog voltage be measured with the micro controller. I can not mix analog and digital grounds for obvious reasons.
I read somewhere to use opto-isolators, but can analog voltages be transferred over the isolator. I have only used opto isolators to isolate two digital circuits. The isolator i used was ILQ74. Can analog voltages be transferred over this isolator??
I want to measure a analog voltage (as high as 220V) from micro controller (PIC). Yes i will use the built in ADC of micro controller and a potential divider to bring down the voltages within measurable limits, but, the problem is, how can this analog voltage be measured with the micro controller. I can not mix analog and digital grounds for obvious reasons.
I read somewhere to use opto-isolators, but can analog voltages be transferred over the isolator. I have only used opto isolators to isolate two digital circuits. The isolator i used was ILQ74. Can analog voltages be transferred over this isolator??