How does a USB keyboard work?

The USB 2.0 spec: Support these videos on Patreon: or for other ways to support. 0:00 Intro 0:50 USB electrical interface 4:43 How USB encodes bits and packets 23:41 USB packet contents 29:26 USB vs. PS/2 ------------------ Social media: Website: Twitter: Patreon: Reddit: Special thanks to these supporters for making this video possible: Aaron Todd, Aleksey Smolenchuk, Alexander Wendland, Andrew C. Young, Anson VanDoren, Anthanasius, anula, Armin Brauns, Ben Cochran, Ben Kamens, Ben Williams, Benny Olsson, Bill Cooksey, Binh Tran, Bouke Groenescheij, Bradley Pirtle, Bradley Stach, Brent Reusing, Bryan Brickman, Carlos Ambrozak, Christian Carter, Christopher Blackmon, Dale Andrew Darling, Daniel Jeppsson, Daniel Tang, dans, Dave Burley, Dave Walter, David Brown, David Clark, David Cox, Da