When we built and powered up the ALU for our 8-bit computer in the last video (https://youtu.be/S-3fXU3FZQc), it didn’t work properly. In this video we’ll try to get to the bottom of what’s going on. I got lucky that the problems were relatively easy to find. Sometimes troubleshooting can take a lot more time and be a lot more frustrating. But it’s also often where you learn the most. Sometimes you’ve just made a silly mistake (that you keep overlooking). Sometimes you get stuck because of some detail you don’t know about *yet*. It’s important to remember that unless you completely give up, you *will* eventually figure it out. There are a lot of resources out there to help you. Sometimes just taking a break and coming back to it a few days later with fresh eyes does wonders. Support me on Patreon: https://www.patreon.com/beneater See https://eater.net/bbcpu8-alu for more.