Hi, I'm looking to create a simple circuit to convert current on a nominal 120VAC line into a voltage. I have a few designs but am having some difficulty keeping parts count low and maintaining accuracy. What I have is as follows: - I am using a shunt resistor, outputting 1mV per ampere of current (0-15mV total). - I take the output from the shunt resistor (120VAC +/- 15mV) and use it as an input for two op-amps (running single supply [+3V] differential amplification). - From the op-amps, I take the output and make it positive only via some diodes, then through a filtering capacitor. - This gives me a voltage proportional to the current, or should.. The problems I am having have to deal with two things... First is parts count. That is a hugely inefficient way to do things, having two entire amplification circuits, even with a dual op amp. I am wondering if there is a way to do this with a single amp. Second, pin voltage is exceeded, as even though the voltage differential is 15mV max, it is on a 120V offset. Do any of you have ideas on how to simplify this circuit? Op amps that might handle 120V on a pin, preferably at a low cost? That also take monopolar power? I tried a voltage divider, but if I divide the offset, I also divide the signal and lower my read resolution. Thanks!