A video explaining the various number systems you may encounter when building/designing computer systems.
Affiliate links for the items shown:
Arduino Nano: https://amzn.to/3NxD88A
Board wire (red, black, white, green, blue, yellow): https://amzn.to/34IBeA5
Purple board wire : https://amzn.to/3rX3OGn
Various colour LEDs : https://amzn.to/3KeSbS1
Breadboards : https://amzn.to/3oTBJOo