Found in a 1970 EEE, this circuit generates signals that depend on the C1 capacitor. Transistors are general-purpose types.
This PWM control was obtained in an English publication in 1989. Transistor Q2 can be the TIP42 for...
This circuit can be used to add a delay to a logic signal as shown by the input and output...
We find this microphone voice effect in 1992 documentation. The vibration of the relay contacts...