This circuit, for frequencies up to 100 kHz, was found in American documentation from 1970. The circuit can serve as a reference for projects with modern equivalent components.
Obtained in a 1969 Ferranti documentation, this circuit dissipates only 2.2 mW with 4.5 V. The...
This 7400 TTL circuit has a memory, keeping the LED on when a pulse is detected. The circuit must be...
This circuit allows coupling optical signals to a TTL input with excellent performance. Among the...