This circuit was found in an Electronics Now from the 90's. The integrated regulator circuit and the power transistor must be equipped with heat radiators.
This small voltage regulator was found in a 1969 EEE. More powerful transistors can be used to...
This voltage-controlled oscillator with two operational amplifiers and a transistor that can be...
This circuit uses a Hall sensor in the feedback of signals that produce oscillations. The circuit is...