---
title: "AddOhms #8:  LEDs and Current Limiting Resistors"
description: "\\ The idea for AddOhms #8 has been around for quite some time. I'm always trying to find ways to explain why current limiting resistors are necessary. So while working in the…"
canonical: "https://www.baldengineer.com/addohms-8-leds-and-current-limiting-resistors.html"
author: "James Lewis"
date: "2014-02-10T12:00:49Z"
lastmod: "2014-12-22T21:55:04Z"
image: "https://www.baldengineer.com/wp-content/uploads/2012/09/addohms-ep8-banner.png"
categories: ["addohms","components","electronics-basics"]
tags: ["addohms","current-limiting-resistors","leds","ohms-law","resistors","tlc5940"]
---

# AddOhms #8:  LEDs and Current Limiting Resistors


[YouTube video 81zNcctopBI](https://www.youtube.com/watch?v=81zNcctopBI)


The idea for AddOhms #8 has been around for quite some time.  I'm always trying to find ways to explain why current limiting resistors are necessary.  So while working in the shop one day, I decided to play with some LEDs and a bench-power supply.  Then I decided to record what happens.

[![IMG_5578](/wp-content/uploads/2014/02/IMG_5578-225x300.jpg)](/wp-content/uploads/2014/02/IMG_5578.jpg)

In fact, I shot all the lab video used here one day.  Then about 3 weeks later, I got around to writing the script for this tutorial.   Since the two were disconnected, you'll probably notice a couple of jump cuts in the live action footage.