This circuit from a 1966 General Electric manual makes use of an SCS. The time is given by the emitter capacitors of the unijunction transistor.
The circuit is from the 1990 Motorola Linear Databook. The circuit can be implemented with other...
Found in a 1967 RCA power manual, this circuit uses an ordinary neon lamp to fire a triac. The...
Found in National Semiconductor documentation from the 1990s, this circuit employs basic...