NOR gate with the 7400 (CB22406E)

The configuration below shows how to use the 7400 as a NOR function. The circuit is TTL and must be powered with 5V.

Monitor for 2 m modulation (CB21743E)
With this circuit it is possible to follow the transmission in the range of 2 meters with a...
6V battery charger (CB6400E)
This circuit was found in a 1967 RCA manual. The transistors are of the time. The adjustment is made to...
Audio Conditioning Unit (CB20015E)
This circuit conditions an audio signal, acting as a filter, control, and reaper of signals. The...