Found in a 1969 documentation, this neon lamp circuit may have the number of steps increased. The power supply is made with high voltage.
This circuit triggers a warning oscillator if you forget the lights on when you leave the car. The...
This circuit was obtained from the Audio Handbook of the National Semiconductor of 1977. We can...
This circuit is from an 80's Radio Electronics. It triggers a load powered by the power grid from...