Found in a 90s American documentation, this circuit mimics the Enterprise warning signal from the movie Star Trek. The signal must be applied to an amplifier.
Found in a 1969 documentation, this neon lamp circuit may have the number of steps increased. The power...
The basic idea of this circuit is that, with a touch of the car headlight switch, the light...
This circuit allows selective relay actuation in the same line according to the applied voltage....