The operational amplifier used is not common today, but the circuit can be implemented with modern operational ones. The gain is 1000 and the source must be symmetrical.
Although it is made for old oscilloscopes up to a few megahertz, this circuit converts your device...
This electrochemical circuit monitors the conductivity of the oil indicating when to change it. The...
This circuit came out in a publication called Electronics Handbook of 1993. The circuit triggers an...