This circuit was found in a 1964 Electronic Design. The components are from the era and the load is 60 W.
Suggested by a 1968 Philips documentation this Eccles Jordan rocker as it was called can operate...
This circuit is from a 90's Radio Electronics. The circuit operates accurately up to about 15 kHz...
This SCR circuit activates a buzzer when triggered. The circuit is from a Popular Electronics from...