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Project Notes

#073 QuadNOR

Demonstrates simple cascading NOR gate logic with the 74LS02 and an Arduino

Here’s the quick demo of the circuit in action:

QuadNOR

Notes

See the NOR7402 project readme for more detail on the 74LS02. This is a simple extension of the NOR7402 circuit that cascades 2 NOR gate into 1, with the resulting logic table:

A1 B1 Y1/A3 A2 B2 Y2/B3 Y3
0 0 1 0 0 1 0
0 0 1 0 1 0 0
0 0 1 1 0 0 0
0 0 1 1 1 0 0
0 1 0 0 0 1 0
0 1 0 0 1 0 1
0 1 0 1 0 0 1
0 1 0 1 1 0 1
1 0 0 0 0 1 0
1 0 0 0 1 0 1
1 0 0 1 0 0 1
1 0 0 1 1 0 1
1 1 0 0 0 1 0
1 1 0 0 1 0 1
1 1 0 1 0 0 1
1 1 0 1 1 0 1

Construction

The Breadboard

The Schematic

The Build

Credits and References

About LEAP#73 CMOS/TTLArduino
Project Source on GitHub Return to the LEAP Catalog

This page is a web-friendly rendering of my project notes shared in the LEAP GitHub repository.

LEAP is my personal collection of electronics projects, usually involving an Arduino or other microprocessor in one way or another. Some are full-blown projects, while many are trivial breadboard experiments, intended to learn and explore something interesting (IMHO!).

The projects are usually inspired by things found wild on the net, or ideas from the sources such as:

Feel free to borrow liberally, and if you spot any issues do let me know. See the individual projects for credits where due. There are even now a few projects contributed by others - send your own over in a pull request if you would also like to add to this collection.