Pulse generator with delay 555 (CB8922E)

We found this circuit in a Hands On Electronics from the 90s. The delay is given by the formulas next to the diagram.

Operational Astable (CB14826E)
This is the conventional configuration of an astable multivibrator with operational, found in a...
Triple 5 V Numitron power supply (CB8673E)
This 1969 Electronics World power supply has 5 V to power digital circuits and a 170 V output for...
Telephone Equipment Regulator (CB6030E)
The Texas TL783 integrated circuit is a three-terminal high voltage regulator with a wide range of...