The S-R Latch (Quickstart Tutorial)

The S-R latch is a key circuit in digital storage units. In this tutorial, you will learn how it works, its truth table, and how to build one with different logic gates.

S-R Latch Symbol
S-R Latch Symbol

What is an S-R Latch?

Before starting with the S-R latch you need to know what a latch is. A latch is an asynchronous circuit (it doesn’t require a clock signal to work), and it has two stable states, HIGH (“1”) and LOW (“0”), that can be used for storing binary data. Many sequential circuits and larger storage devices, such as shift registers, use latches as their principal building block.

Half Adder Circuit – How it Works

A Half Adder is a digital circuit that adds binary numbers. In this tutorial, you will learn how it works, its truth table, and how to implement one using logic gates. 

Half Adder Circuit
A Half Adder Circuit

What is a Half Adder?

A Half Adder is a digital circuit that carries out the addition of binary numbers. It’s the simplest of digital adders and you can build one using only two logic gates; an XOR gate and an AND gate.