This electronic Morse Key for telegraph message transmission was found in an American 1980s amateur radio documentation. The circuit uses TTL technology and must be powered by a 5V voltage.
This interesting circuit from Radio Elecronics from October 1965 shows a flip-flop or bistable with...
The basic idea of the circuit shown in the figure is to increase the brightness of an ordinary...
Found in an American documentation, this regulator supplies a current according to the integrated...