We found this circuit in the Linear Applications Handbook of the 1994 National Semiconductor. The transistor must be a high voltage type and the LM3900 power supply must be symmetrical.
This bistable or flip-flop is triggered by a negative pulse applied to the collector of the...
This circuit was obtained in a 1980 publication. The transistors can be BC548 or 2N2222. The...
This circuit has its battery charged by a solar system. The circuit uses components that admit...