The inverter (or NOT) Bit is a simple logic Bit with one input and one output. It sends out the opposite of whatever it receives: send it an ON signal, and the inverter changes it to an OFF signal, or vice versa.

Anytime the inverter Bit receives a signal lower than 2.5 volts, the inverter sends an ON signal of 5 volts from the output. If the inverter receives a signal greater than 2.5 volts, the inverter sends an OFF signal of 0 volts from its output.