Here's 8 questions you've sent in. Rare (at least, up until now) video of James talking unscripted. Questions answered in this video:
1. Why does AC change direction?
2. What do home appliances run on?
3. Is Analog or Digital More Accurate?
4. When do you use Pull-down resistors?
5. Difference between LM7805 and LM7812?
6. What diode to pick for a motor's flyback diode?
7. Does James draw his own Animations?
8. What does "AddOhms" mean?