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.

Space Gun (CB20449E)
This circuit can be installed inside a toy space gun to produce a “Phaser” effect. The circuit is from...
Timed Residential Alarm (CB16558E)
This circuit was found in a 1988 publication. The circuit is an alarm with interrupt sensors that...
Relaxation oscillator Using Bipolar Transistors (CB884E)
The frequency in this circuit is adjusted by P1 and given by C1. Short pulses, as the ones...