1-minute delay (CB21408E)

This circuit with PUT is from a 1967 General Electric manual. The relay must have voltage according to the supply.

H-bridge drive circuit (CB23553E)
The above project is an H –H bridge drive circuit and can be used to drive DC motors and in the...
Fast Summing Amplifier (CB15892E)
Integrated LM108 and LM101A are used in this fast adder with low input current, figure. The...
Frequency Doubler (CB13736E)
This circuit was obtained in a 1975 documentation. The maximum frequency depends on the diodes and the...