I am currently working on the following op amp:
Notes about this: all grounds are tied together. The object plugged into the + sign on the op-amp is a piezoelectric tab, which generates +/- 70 Volts (up to, but rarely that much) upon being shook. I am trying to make a simple vibration sensor.
The chip is the 8 dip LM741CNFS, from Fairchild Semiconductor.
The resistor values are 220 Ohm both, though I've tried it with a number of additional resistors to see if the resistor values were causing trouble.
When powered, my op amp has a constant 2 volt surplus, as measured by my oscilloscope.
One might say it is the fact that the vibration sensors can generate such wild swings of +/- 70 Volts. I also run this circuit with a zener diode in parallel to the sensor, making it so it can only generate 0-5V. I have tested this myself and it does work.
What is going wrong? What am I missing?
Thank you for your time.