We found this circuit in a 1985 technical publication. The circuit uses PUTs to drive lamps. Relays or LEDs can be used with the voltage according to the supply.
This circuit can generate signals in the audio range between fraction of hertz up to approximately 10 kHz...
This circuit uses a GE optical coupler. Equivalents can be tried. The circuit is from the GE...
We found this circuit in an Electronics Now magazine from June 1995. The transformer has a primary...