This circuit is from a Radio Electronics from April 1964. The circuit uses power transistors of the time, which must be mounted on a good heat radiator. Modern equivalents can be used.
This simple TTL circuit indicates which was the first to press one of the four pressure switches. The...
This power supply that can supply current according to the LEC is suitable for small projects. The LED...
Found in a General Electric documentation from 1970, this circuit consists of a relaxation...