This simple circuit uses a car ignition coil. The circuit appeared in the 1983 Radio Electronics Annual Edition. The circuit supports equivalent transistors.
This circuit is a driver for R-2R network of AD converters. We found it in manufacturer...
This circuit was found in an American publication from the 60's. The transistor is made of...
This circuit produces an audio tone on the speaker or magnetic capsule. Rx must be such that added...