NOT gate (inverter)
Inverter: the output is always the opposite of the input.
Truth table
| A | Y |
|---|---|
| 0 | 1 |
| 1 | 0 |
Pins
One input, one output.
How to use it
Use it whenever you need a complement such as A̅. The little bubble on NAND and NOR is a built-in NOT.
Usage example
One input, one output: when A is 0 the output is 1, so the LED is lit while the switch is off.