relay-logic
The Half Adder: How 1 + 1 = 10 Emerges From Two Relay Gates
In the previous post, we built a circuit that chooses — a multiplexer that uses a selector input to steer one of several signals to a single output. Every circuit...
Tag
half-adder
A collection of 3 posts
arithmetic-circuits
The Half Adder vs. The Full Adder: How Computers Do Math
TL;DR: A half adder sums two single bits to produce Sum (XOR) and Carry (AND). A full adder sums three bits — A, B, and a carry-in — and is...
half-adder
The Half Adder: Your First Step into Digital Logic Design
TL;DR: A half adder is the simplest binary-addition circuit. Two inputs (A, B) produce two outputs: Sum = (XOR) and Carry = (AND). It's only "half" an adder because it...
New circuits & lessons, in your inbox
Occasional updates on new SimCast lessons, components, and build guides. No spam — unsubscribe anytime.