This circuit was found in an old documentation, being able to generate signals of frequencies in the range of 50 to 100 MHz. The components are of the time.
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...