Hello, this circuit here was something I made to illustrate the NAND gate inside the 74HC00 integrated chip. For some reason, it's not following the truth table. When both switches are LOW, the light bulb turns on, which makes sense as it's supposed to do that. But when I switch one slide switch to …

This NAND gate circuit is not working as its supposed to!

ruilviana May 12, 2021, 8:39pm 2

Reverse the LED and connect to the GND instead of + VCC,
and it will work as it should.

RV mineirin

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