This circuit was found in a 1967 Japanese documentation. It consists of a touch control system with two transistors from the time. The circuit uses a power source and sensitive relays.
Found in older documentation this setting applies to modern components, noting that the power...
This simple circuit must be powered by a voltage of 5 V. The integrated circuit is the 7400, but...
When this circuit picks up a louder sound it produces a pulse that briefly charges the 10 uF...