Switch AND gate – LED circuit

The switch AND gate is really just like any other switch circuit but with 2 (or more) switches in series. If any off them are off/open, then the whole circuit is off. In a real life circuit, you may want something to be off unless 2 people in separate areas are pushing a button or something.

There are integrated circuit AND gates that you most likely see in practical circuits, but the switch version is helpful for understanding AND gates.

Basics

AND gate schematic symbol truth table diagram by Electronzap Electronzapdotcom
AND gate schematic symbol truth table diagram by Electronzap Electronzapdotcom

All of the inputs have to be high for the output to be high.

For switch based AND gate circuits, all switches have to be closed (on) for the output to be on.

Diagram

Mechanical switch AND gate demonstration circuit schematic diagram by electronzap electronzapdotcom
Mechanical switch AND gate demonstration circuit schematic diagram by electronzap electronzapdotcom

AND gates are on/off aka. 1/0 aka. High/Low … etc. digital based circuits.

Video

Push button switch input AND logic gate electronic circuit with resistor protected LED output

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