I have a piezo sensor that is putting out 1.1mVAC when resting when a Fluke is connected set on AC Volt. It is quite "steady" at 1.1mVAC, and at times goes to 1.1mVAC and to 1.2mVAC.
Above 1.4mVAC reading there is definitely an external trigger going on, and operational readings are expected to take place at the 2-10 mVAC level. Putting aside improving the sensitivity of the sensor itself, what would be the best approach to amplify it for an ADC-read at a minimum 1V scale but preferably a 3V scale of an MCU such as the Nano. Need to measure the signal amplitude (not just exceeding the threshold). So need to amplify it by min. 1000 times at the 1mVAC reading and 300 times at the 10mVAC reading..
Simple OP AMP? Instrumental OP AMP? Any pre-conditioning before the OP AMP?
Above 1.4mVAC reading there is definitely an external trigger going on, and operational readings are expected to take place at the 2-10 mVAC level. Putting aside improving the sensitivity of the sensor itself, what would be the best approach to amplify it for an ADC-read at a minimum 1V scale but preferably a 3V scale of an MCU such as the Nano. Need to measure the signal amplitude (not just exceeding the threshold). So need to amplify it by min. 1000 times at the 1mVAC reading and 300 times at the 10mVAC reading..
Simple OP AMP? Instrumental OP AMP? Any pre-conditioning before the OP AMP?