Learn how computers add numbers and build a 4 bit adder circuit

2015-03-01

[public] 3.41M views, 54.5K likes, 701 dislikes audio only

Let's build a circuit that adds numbers! Binary addition is even easier than decimal addition since you don't have to know how to add numbers larger than 1.

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You can get all the components used in this video from any online electronic components distributor for a few dollars.

Complete parts list:

2x 74LS86 (Quad two-input XOR gate)

2x 74LS08 (Quad two-input AND gate)

1x 74LS32 (Quad two-input OR gate)

2x 4-position DIP switch

5x LEDs

1x Solderless breadboard

22 gauge wire

USB charger and cable or some other 5v power source