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 twoinput XOR gate)
2x 74LS08 (Quad twoinput AND gate)
1x 74LS32 (Quad twoinput OR gate)
2x 4position DIP switch
5x LEDs
1x Solderless breadboard
22 gauge wire
USB charger and cable or some other 5v power source