Found in old documentation, this circuit can use modern equivalent components. The signal has good strength thanks to the use of a power transistor. The Q1 transistor is a unijunction of the time.
This conventional slow-moving circuit uses incandescent light bulbs, but can be changed to use...
Found in a 1969 documentation, this neon lamp circuit may have the number of steps increased. The power...
This circuit for 6 lamps was found in old American documentation. The supply is of high voltage...