This is the old name given to flip-flops or biestable multivibrators. In fact, this is a 1967 Ferranti circuit, triggered by a light sensor.
We found this circuit in a 1975 publication. The power supply must be symmetrical, but other...
This circuit is from 1977 documentation, and high current equivalent transistor must be used. The...
Although indicated in the original publication of the 1980s as a capacitance switch, the circuit...