We found this circuit in a 1996 publication. The circuit uses components that are still common. The timing depends on C1, which can be changed, and the triac can be of any type.
The oscillator circuit is an ICM7556, the dual CMOS version of the 555. The frequency depends on...
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...
This circuit was found in an American documentation from 1968. The circuit uses transistors from that...