This circuit was obtained in a 1978 publication. The supply can be symmetrical from other voltages. Frequency can be changed by changing the capacitors.
This commercial circuit is from a Japanese magazine from 1967. It uses germanium transistors, and...
This circuit uses matched transistors. The circuit is from Electronics Now magazine and has a...
This tone-modulated transmitter produces a tone with frequency depending on C4 and C5. Free...