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.
This static switch or triac contactor was obtained from Philips 1969 documentation. The SCR is...
This circuit was obtained in a French documentation from 1981 and can be easily assembled. The...
This circuit was found in 90s Radio Electronics. The transistor can be any general purpose....