NOT Gate Digital logic gate example

Logic Gate Fundamentals: NOT GATE (Inverter) so Truth table is: Switch 0 (open), LED 1 (on), Switch 1 (closed), LED 0 (off), Hence the "inverter" name. I used 2mA for the red LED as that the current I tested from my bench power supply. I used a 2N2222 NPN BJT. Just a breadboard example of only a handful of digital logic circuits that make up the technology we have possible. This is a bread board experiment for learning fundamentals. This could be achieved in a few characters of programming code or by buying an IC that has the NOT GATE already in it. I will be building one of these for the remain fundamental logic gates.

published 3 years ago