This circuit was found in a Hands On Electronics from the 90s. The circuit does not need a symmetrical power source. The signals with which it operates are alternating.
This circuit is from 1971 American documentation. Transistors are still common except for 2N2060...
Originally suggested by Popular Electronics to control Christmas lights, this circuit can...
I found this electronic organ in magazine published in 1976 from my vast collection of foreign...