Digital logic, an Inverter or NOT gate Digital logic, an Inverter or NOT gate | Page 8

THEORY
Explanation of Not gate with light switch circuit
The NOT gate can be easily understood by using a LED (light emitted Diode)
circuit. This is also called Light switch circuit. In this circuit, NOT gate functions
like an electronic switch. When it got high input, the LED connected at the
output will be OFF, as the output of NOT gate becomes 0. In the same way, when
the logic gate is connected with LOW input, the LED will be ON, as the output
becomes 1. The Light switching circuit with NOT gate is shown below.