This circuit was found in a Popular Electronics documentation from the 90s. It is possible to switch the frequency of an oscillator by voltage. The circuit can act as a shield.
The circuit shown is from old English documentation and can be made with BC548 transistors for low...
This sequential relay actuation system circuit for traffic lights was found in Electronics Now...
This circuit limits (clip) the intensity of a signal, according to the setting of P. The circuit is...