Electronics

Car Electronics: All About Circuits (thanks Liam & Jack! 🙂)
A Beginner’s Guide to Soldering Metal, Circuits, and More! (thanks Nicole! 🙂)
All About Electronic Circuits for Kids (thanks Noah! 🙂)
Lessons in Electric Circuits (from this HN thread)
A simple guide to electronic components (40’ video)
Tronix Arduino Tutorials
Tinkercad: A simple, online 3D design and 3D printing app for everyone.
Electronic Components
Take a Video Crash Course in Beginner Electronics
Ask HN: How to self-learn electronics?