This circuit was originally intended to operate with a solar source for experiments. Transistors are general purpose, and the output current is relatively low.
This circuit is from a 1980s Signetics documentation. Equivalent operational amplifiers may be...
This interesting circuit was obtained from a Poptronics of February 2001. The American magazine no...
A high-frequency square wave oscillator using an LC-tuned circuit is shown bellow. The upper...