This tutorial takes the next step towards understanding how a bunch of resistors and transistors turn into a real computer.

Previously we created gates and now we will use them to create both a 1 Bit & a 4 Bit Binary Calculator on a breadboard. I’m using a NAND 7400 IC to create an XOR Gate. I’m using a 4 Bit Binary Adder 74LS283 IC to create that circuit. The circuit diagrams can be found below.

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Circuit Diagrams