CRC (cyclic redundancy check) involves some intimidating math. But it turns out that it can all be done with some fairly simple hardware. In this video, I build the hardware to compute and verify CRCs. Previous video on CRC theory is here: https://youtu.be/izG7qT0EpBw Code from this video: https://github.com/beneater/error-detection-videos Hardware used in this video (affiliate links): 4x Breadboards: http://amzn.to/2uXgIVO 2x Arduino nanos (link is for a 3-pack): https://amzn.to/2JI5fDi 2x 16x2 LCD panel: https://amzn.to/2zKyHVo Resistors http://amzn.to/2u24Wwm (though obviously you don’t need the whole kit): ~40x 220Ω-470Ω or so (for current-limiting LEDs & LCD backlight) 5x 100kΩ 32x Yellow LEDs: http://amzn.to/2wjSPHn (link is for 25 pack) 4x 74HC273: https://amzn.to/2un5WJp http://bit.ly/2KX740P 2x 74HC86: https://amzn.to/2NMkJFE http://bit.ly/2KVxU9l Wire: http://amzn.to/2uU3D1b http://bit.ly/2KX9AE2 Support these videos on Patreon: https://www.patreon.com/beneater or https://eater.net/support for other ways to support. ------------------ Social media: Website: https://www.eater.net Twitter: https://twitter.com/ben_eater Patreon: https://patreon.com/beneater Reddit: https://www.reddit.com/r/beneater Special thanks to these supporters for making this video possible: Ben Dyson Ben Kamens Ben Williams Brandon Stranzl Christopher Blackmon Debilu Krastas Eric Dynowski Gonzalo Belascuen Jay Binks Jayne Gabriele Johnathan Roatch Jordan Scales Manne Moquist Mark Michael Burke Mirko Rener Nicholas Moresco Nick Wrightsman Old Lion Randy True Ric Allinson Robert Butler Sachin Chitale SonOfSofaman