This old configuration of an audio amplifier has a push-pull two-transistor output stage. Output power is low and the critical components are the transformers. The circuit was found in an 1958’s publication.
This oscillator generates a fixed frequency signal determined by C1 and C2. In the case of 1 nF,...
This motor control using transistors was found in a recent English publication. The circuit is for...
This circuit is from an old documentation using OP27. This operational amplifier is not common...