The low-noise amplifier shown uses a rare Raytheon operational amplifier today. The circuit can be implemented with more modern operators and the power 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...