Ben Eater

The term "checksum" can refer to all sorts of different error detection codes. How are some better than others? What types of errors are they good at detecting? And how do you calculate different types of checksums? 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: ahmed Ben Dyson Ben Kamens Ben Williams Brandon Stranzl Christopher Blackmon Debilu Krastas Eric Dynowski Gonzalo Belascuen Greg Stratton Jayne Gabriele Johnathan Roatch Jordan Scales Manne Moquist Michael Nicholas Moresco Randy True Ric Allinson Sachin Chitale

CRC (cyclic redundancy check) is one of the most common methods of error detection. It uses some interesting mathematical tricks to guarantee that it can catch certain kinds of errors. How does it work? 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 Greg Stratton Jay Binks Jayne Gabriele Johnathan Roatch Jordan Scales Manne Moquist Michael Nicholas Moresco Nick Wrightsman Randy True Ric Allinson Sachin Chitale SonOfSofaman

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

Let's build a circuit that displays an image on a VGA monitor! In this video, I talk about how VGA signals work and build a circuit that provides the correct timing of sync signals so that a monitor recognizes the signal. 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 Christopher Blackmon Debilu Krastas Eric Dynowski fxshlein Gonzalo Belascuen Ian Tait Jay Binks Jayne Gabriele Johnathan Roatch Jordan Scales Manne Moquist Marcus Classon Michael Burke Mirko Rener Nicholas Moresco Nick Wrightsman Onion Sniffer Paul Pluzhnikov Randy True Ric Allinson Robert Butler Sachin Chitale SonOfSofaman Vladimir Kanazir Örn Arnarson

For part 1, see this video: https://www.youtube.com/watch?v=l7rce6IQDWs Let's build a circuit that displays an image on a VGA monitor! In part 2, I talk about how VGA uses analog RGB signals to send different color pixels to the monitor. I use an EEPROM to store an image and build a simple digital-to-analog converter to generate the color signals to successfully display an image. 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: Name Alexander Catchpole Beau-James Erion Ben Ben Dyson Ben Kamens Ben Williams Christopher Blackmon Dean Winger Debilu Krastas Dušan Dželebdžić Eric Dynowski Erik Broeders fxshlein Gonzalo Belascuen HaykH Ian Tait Ivan Sorokin JavaXP Jay Binks Jayne Gabriele Jimmy Campbell Jordan Scales Justin Duch Manne Moquist Marcus Classon Mats Fredriksson Michael Burke Michael Garland Miguel Ríos Mirko Rener Nathan Wachholz Nicholas Moresco Nick Wrightsman Onion Sniffer Paul Pluzhnikov Randy True Robert Butler Sachin Chitale Sergey Ten SonOfSofaman Stefan Nesinger Steve Gorman Vladimir Kanazir Örn Arnarson

Learn how computers work in this series where I build and program a basic computer with the classic 6502 microprocessor. More info: https://www.eater.net/6502 Part 2: https://www.youtube.com/watch?v=yl8vPW5hydQ Part 3: https://www.youtube.com/watch?v=oO8_2JJV0B4 Part 4: https://www.youtube.com/watch?v=FY3zTUaykVo Part 5: https://www.youtube.com/watch?v=xBjQVxVxOxc Part 6: https://www.youtube.com/watch?v=i_wrxBdXTgM Part 7: https://www.youtube.com/watch?v=omI0MrTWiMU 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: Alex Catchpole Armin Brauns BakerStaunch Beau-James Erion Ben Ben Dyson Ben Kamens Ben Williams Bradley Pirtle Christopher Blackmon Clayton Parker Coleman Daniel Tang Dean Winger Debilu Krastas Dominic Kulmer Dušan Dželebdžić Eric Brummer Eric Dynowski Erik Broeders Eugene Bulkin fxshlein HaykH Ian Tait Ivan Sorokin JavaXP Jay Binks Jayne Gabriele Jefferson Hunt Jimmy Campbell Joel Messerli Joel Miller Jordan Scales Joshua King Justin Duch Kent Collins Manne Moquist Marcus Classon Mats Fredriksson Michael Michael Burke Michael Garland Miguel Ríos Nathan Wachholz Nicholas Moresco Onion Sniffer Paul Pluzhnikov Peter Simard Randy True Robert Butler Sachin Chitale Sergey Ten SonOfSofaman Stefan Nesinger Stephen Smithstone Steve Gorman Thomas Ballinger Vladimir Kanazir xisente Örn Arnarson

Schematics, datasheets, kits, and more at https://eater.net/6502 Part 1: https://www.youtube.com/watch?v=LnzuMJLZRdU Part 2: This video! Part 3: https://www.youtube.com/watch?v=oO8_2JJV0B4 Part 4: https://www.youtube.com/watch?v=FY3zTUaykVo Part 5: https://www.youtube.com/watch?v=xBjQVxVxOxc Part 6: https://www.youtube.com/watch?v=i_wrxBdXTgM Part 7: https://www.youtube.com/watch?v=omI0MrTWiMU 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: Adam Lininger Alex Catchpole Andrew R. Whalley Anthony Cuccia Armin Brauns BakerStaunch Beau-James Erion Ben Dyson Ben Kamens Ben Williams Bradley Pirtle Brian Wanda Carlos Ambrozak Christopher Blackmon Clayton Parker Coleman Daniel Tang Dave Walter David H. Friedman David Turner Dean Winger Debilu Krastas Dušan Dželebdžić Dzevad Trumic Eric Brummer Eric Dynowski Eric Twilegar Erik Broeders Eugene Bulkin Foaly fxshlein Gabriel Lafond-Thenaille HaykH hunter wright Ian Tait Ivan Sorokin Jackson Warren JavaXP Jay Binks Jayne Gabriele Jeremy A. Jeremy Wise Jimmy Campbell Joel Messerli Joel Miller Joern Heidenreich Jordan Scales Joshua King Justin Dubs Justin Duch Kent Collins Manne Moquist Marcus Classon Mats Fredriksson Michael Michael Burke Michael Garland Michael Tedder Miguel Ríos Nathan Wachholz Nicholas Moresco Nick Sutton Nick Wrightsman Onion Sniffer Paul Pluzhnikov Paul Randal Peter Simard Randy True Rob Bruno Robert Blackshaw Robert Butler Sachin Chitale Scott Sergey Ten SonOfSofaman Stefan Nesinger Stefanus Du Toit Stephen Smithstone Steve Jones Steve Gorman Steven Pequeno Thomas Ballinger Tom Burns

Schematics, datasheets, kits, and more at https://eater.net/6502 More on vasm: http://sun.hasenbraten.de/vasm Part 1: https://www.youtube.com/watch?v=LnzuMJLZRdU Part 2: https://www.youtube.com/watch?v=yl8vPW5hydQ Part 3: This video! Part 4: https://www.youtube.com/watch?v=FY3zTUaykVo Part 5: https://www.youtube.com/watch?v=xBjQVxVxOxc Part 6: https://www.youtube.com/watch?v=i_wrxBdXTgM Part 7: https://www.youtube.com/watch?v=omI0MrTWiMU 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: Adam Lininger Adrien Friggeri Alex Catchpole Andrew R. Whalley Anthony Cuccia Armin Brauns BakerStaunch Beau-James Erion Ben Dyson Ben Kamens Ben Williams Bradley Pirtle Brian Wanda Bryan Brickman Carlos Ambrozak Chad Fertig Christopher Blackmon Clayton Parker Coleman Daniel Tang Dave Walter David Boardman David H. Friedman David House David Turner Dean Winger Debilu Krastas Dušan Dželebdžić Dzevad Trumic Eric Brummer Eric Dynowski Eric Twilegar Erik Broeders Eugene Bulkin Foaly Gabriel Lafond-Thenaille HaykH Ian Tait Ivan Sorokin Jackson Warren JavaXP Jay Binks Jayne Gabriele Jeremy Wise Jimmy Campbell Joel Messerli Joel Miller Joern Heidenreich Jordan Scales Joshua King Justin Dubs Justin Duch Kefen Kent Collins Manne Moquist Marcus Classon Mats Fredriksson Michael Michael Burke Michael Garland Michael Tedder Miguel Ríos Nathan Wachholz Nicholas Moresco Onion Sniffer Paul Pluzhnikov Paul Randal Peter Simard Philip Hofstetter Randy True Richard Wells Rob Bruno Robert Blackshaw Robert Butler Ross Sachin Chitale Sam Rose Scott Sergey Ten Sever Banesiu SonOfSofaman

Schematics, datasheets, kits, and more at https://eater.net/6502 Part 1: https://www.youtube.com/watch?v=LnzuMJLZRdU Part 2: https://www.youtube.com/watch?v=yl8vPW5hydQ Part 3: https://www.youtube.com/watch?v=oO8_2JJV0B4 Part 4: This video! Part 5: https://www.youtube.com/watch?v=xBjQVxVxOxc Part 6: https://www.youtube.com/watch?v=i_wrxBdXTgM Part 7: https://www.youtube.com/watch?v=omI0MrTWiMU 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: Adam Lininger Adrien Friggeri ahmed Alex Catchpole Andrew R. Whalley Anthony Cuccia Armin Brauns Austin Grant BakerStaunch Beau-James Erion Ben Dyson Ben Kamens Ben Williams Bradley Pirtle Brandon Stranzl Brian Wanda Bryan Brickman Carlos Ambrozak Chad Fertig Christopher Blackmon Chuck Crizer Clayton Parker Coleman Daniel Tang Dave Walter David Boardman David H. Friedman David House David Turner Dean Winger Debilu Krastas Dominic Kulmer Dušan Dželebdžić Dzevad Trumic Eric Brummer Eric Busalacchi Eric Dynowski Eric Twilegar Erik Broeders Eugene Bulkin Foaly fxshlein Gabriel Lafond-Thenaille HaykH hunter wright Ian Tait Ingo Eble Ivan Sorokin Jackson Warren Jason DeStefano JavaXP Jay Binks Jayne Gabriele Jeremy A. Jeremy Wise Jimmy Campbell Joel Messerli Joel Miller Joern Heidenreich Jon Dugan Jordan Scales Joshua King Justin Dubs Justin Duch Kefen Kent Collins Maksym Zavershynskyi Manne Moquist Marcus Classon Mats Fredriksson Matt Alexander Matthew Mattox Matthäus Pawelczyk Michael Michael Burke Michael Garland Michael Tedder Miguel Ríos Mirko Rener Nathan Wachholz Nicholas Counts Nicholas Moresco Nick Sutto