This 80's circuit uses a germanium transistor like the AC121. The circuit has an output transformer of the type found on many transistor radios of the time.
This circuit multiplies a time constant given by the input components. The circuit admits...
This circuit is nothing more than a powerful audio oscillator or buzzer with a power transistor. The...
An way to change the frequency of the previous oscillator (CIR112E) is to add a variable capacitor in the...