The selected circuit was found in GE's 1977 semiconductor manual. 3N84 is a controlled silicon switch and SCRs support equivalents. The transistor can be a BC558, depending on the supply voltage.
The simple transistor test shown in the figure can be powered by a 9V battery. The test is for...
This small amplifier, close to 1 W, was found in a 1963 documentation. The class B circuit uses...
The circuit shown in the figure uses 2 of the 4 NAND gates of a 4011 and is designed to produce short...