Google I/O is the premier Google developer event, and is always sold out *very* quickly! Very.Keep an eye on the registration site... as soon as it opens, you should be booking your seat. Don't say you've not been warned! ;)
I received an email from Google HR a few minutes ago, wishing me a happy birthday... even though it's still a few months before my real birthday.
It was to congratulate me on my first year at Google, or in the words from HR "You have been at Google for 365 days, 1/10th of a decade, >3.15 x 1010 milliseconds, 20% of a lustrum or 0.001 of a millennium and today is your 1st Google Birthday :)" Incredibly, 43% of Google joined after me, which just shows the incredible growth... and the best (eg.) is yet to come!
First up: Homopolar motor. It's not my idea, I have to confess. It was Farraday's idea and he first did this demo in 1821.
What do you need:
1) A battery. Round ones work best. Just take a normal AA battery, one that you won't mind throwing away, as you'll pull a lot of current through it. Expert tip: For best results, find one where one of the poles on the battery is not perfectly flat. You ideally want it to be a bit rounded or with a slight tip on it to reduce the friction with the screw
2) A screw. Expert tip: This could be a nail or anything else really, but it needs to a) conduct electricity and b) magnetic field. You want one that is as heavy as your magnet can hold. Too heavy, and it will f…