The circuit shown was found in the 1994 National Semiconductor's Linear Application Handbook. The op amp admits equivalents and the power supply must be symmetrical.
This circuit is from a 1987 American publication called Electronics Handbook. The circuit can be...
The indicated circuit performs a slow charge of 12 V batteries maintaining a constant current of...
This ultra-simple circuit need a carbon microphone to operate. The circuit must be powered from D...