This is a transistor flip-flop suggested by General Electric in a 1966 paper. The transistors are of the time and can be used equivalents.
The code switch circuit with optical sensors shown in the figure was found in a 2000 Poptronics. The...
This control allows to start or stop a motor up to 3 or 4 A with a low intensity signal. The...
This series motor control circuit was obtained from an old manual from the 80's. The SCRs must be...