This circuit, which is present in other points of this website, was found in a 90s Hands On Electronics. The circuit activates a buzzer with an oscillator.
This control circuit up to 1 kW was found in a 1967 RCA documentation. The components are from...
This circuit was found in 1967 General Electric documentation. The transistors of the time can be...
This circuit produces signals in the range of 200 Hz to 2 kHz. We found it in the magazine...