This circuit is from General Electric documentation from 1965. The SCR and unijunction transistor may be modern equivalents. For the indicated values of the components, the delay ranges from 0.4 ms to 1 minute.
This circuit is from General Electric documentation from 1965. The SCR and unijunction transistor may be modern equivalents. For the indicated values of the components, the delay ranges from 0.4 ms to 1 minute.