This circuit found in an American documentation from 1964, alters the duration of a pulse and can operate at frequencies up to 10 MHz. The transistors are from that time.
This unusual circuit from a Popular Electronics of the 90s uses LED indicators, operating as a...
Found in a 1960 Sylvania transistor manual, this circuit can be implemented with modern...
In fact, this circuit from the 60's applies to photographic printers of the time, timing the...