This circuit uses components of the time. We found it in a 1968 US documentation. The delay is 100 ns and the input impedance is 1 k.
This circuit is intended for charging 12 V Nicad batteries, which corresponds to 10 common...
This type of circuit, found in American documentation from the 1980s, triggers producing output...
This relay without lock uses a general-purpose transistor. The relay is according to the supply....