relay-logic
Full Adder from Relays: Carry the One — and Add Any Number
In the previous post, we built the half adder: XOR for the sum bit, AND for the carry bit. Two inputs in, two outputs out — a clean circuit that...
Tag
arithmetic
A collection of 3 posts
number-systems
BCD (Binary-Coded Decimal): Fundamentals Explained
TL;DR: Binary-coded decimal (BCD) stores each decimal digit 0–9 in its own 4-bit nibble, leaving codes 1010–1111 invalid. Adding two BCD digits requires a "+6" correction whenever the binary sum...
alu
How an ALU Works: Arithmetic Logic Unit from Gates
TL;DR: An Arithmetic Logic Unit (ALU) is a combinational circuit inside a CPU that performs arithmetic operations (addition, subtraction) and bitwise logic operations (AND, OR, XOR, NOT, shifts) on two...
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