Based on a unijunction transistor, this circuit was found in the January 1994 issue of Electronics Now magazine. The frequency range depends on C1, which can be changed.
This circuit is from a 1967 publication. The Triac can be any of the TIC series. The series...
This circuit is suitable for isolating audio signals, as it has very low distortion. The used...
This circuit was found in the Philips integrated circuits manual of 1990. The integrated circuit must...