Glue Logic Tester

Device that tests quad gate 74xx series ICs.


Summary

This is a device that tests quad gate 74xx series chips. It generates a truth table which is displayed by the four LEDs. It is powered by the two pin 5V power connector on the bottom. It is useful for testing salvaged glue logic chips to make sure they still work. However, it does not test each individual gate with all possible values, instead only testing each gate with unique inputs.

Gate Inputs

Gate A B
1 HIGH HIGH
2 HIGH LOW
3 LOW HIGH
4 LOW LOW

Gallery

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