We found this precision circuit in a manual from the 80's. The operational amplifier is of a common type at the time, and equivalents can be tested. Transistors are general purpose types.
We found this circuit in a 90's European schematic. The circuit can be implemented with almost any...
This alarm oscillator was found in the December 1974 issue of Radio Electronics magazine. Rx...
The purpose of this regulator is to regulate the RMS voltage in an alternating current load. The...