How a Digital Logic Gate Works

Basic Digital Logic Gate - Electronic Circuits for the Evil Genius


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Lesson 14

Animated Version of Figure L14-01

Animated Analog Input Controlling Digital Switch

This animation shows how an analog input produces a digital output.

Animated Version of Figure L14-2

The NOT Gate:
The output is NOT the imput

Animated Version of Figure L14-3

For prototyping purposes only, the action of the finger represents a digital Hi or Lo.

Animated Version of Figure L14- 4

Build this Circuit - Animated NOT Gate with simulated Analog Input

This circuit is a working model of the NOT Gate

Animated Version of Figure L14 - 5

AND Gate with 2 Analog Inputs, controlling Digital Switching

The input action is similar to the PB N.O.

Animated Version of Figure L14-7

OR Gate with Analog Inputs Controlling Digital Outputs

This is the OR Gate. The PB N.O. action
imitates the action of the NPN transistors.

Animated Version of Figure L14 - 9

NAND Gates: Analog Inputs Controls Digital Output

By replacing the PB N.O. with PB N.C.s, the entire logic table changes, producing the NAND Gate. Note that the output is completely reversed from the AND Gate.

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