We found this circuit in a 1967 General Electric SCR manual. The time is set to R1 and depends on C1 which must be a low-leak capacitor.
This circuit is from 1998 documentation. It is a system that allows automatic doors to be operated...
Found in Linear Technology documentation, this amplifier requires a symmetrical power source and...
We found this setting in the National Semiconductor Linear Applications Handbook. The base is an...