This circuit was suggested by General Electric / RCA in a 1980s documentation. The components are of the time and the circuit must be powered by symmetrical source.
Found in a 1968 US publication, this circuit is designed to measure very weak signals. The...
This simple circuit is designed to charger AA or AAA Nicad batteries. Current can be changed...
This circuit was found in a 1980s US publication. There may be some difficulty in obtaining the...