The circuit shown uses an unusual regulator currently, which is the LM2935, which must be mounted on a heat radiator. The circuit is from Motorola's Linear Interface ICs.
This circuit, from ancient French documentation, produces a rectangular pulse from input pulses...
This control is from the Motorola Circuit Applications for the Triac of 1971. The Triacs can be...
This circuit is from 1964 documentation but can be easily implemented based on current components....