We found this circuit in a 1985 documentation. The transformer is an old TV flyback that has an exposed part of the core, where 10 to 20 turns of common wire are wrapped.
This circuit causes an LED to flash at a frequency determined by the capacitor. The circuit has an...
Found in American documentation from the 1980s, this circuit uses transistors from that time. It...
This very interesting project was obtained in a 1980 publication. It consists of a device that is...