Found in the July 1970 Radio Electronics magazine, this circuit has an adjustable activation time that depends on capacitor C1. The SCR may be a 106 series equivalent.
This circuit was obtained from Signetics documentation from the 80's. The components used are from...
The configuration presented below was obtained in the Linear Application Handbook of the National...
This circuit can be designed with ease today, as its components are common. We found it in old...