Found in an old Elektor, this circuit uses two 7-segment displays to indicate the volume of an amplifier. The circuit uses components that are still common today.
This circuit is found in an American documentation from the 80's. The circuit measures the power of...
This is one of many possible configurations for this type of oscillator that generates sinusoidal...
This circuit can be used to drive relays, solenoids, motors and other loads according the...