It’s only natural. Whenever we want to put two things together, we reach for the glue. And there’s nothing wrong about that! But wouldn’t it feel much sweeter and special if you could assemble an object, simply by pressing it into each other like Lego? Most material can do this, if they are shaped properly, and wood is exceptionally good at doing this. ThisWoodwork made this mirror by fitting pieces of wood together. Sure, he used glue for the ornament, but the main construct doesn’t need it. It just fit into each other like they were ment to be together! If the tolerances are good, you don’t need any glue. And if the tolerances are bad, chances are you can fix it with a file or a piece of masking tape!
Most electrical motors uses electromagnetism in order to transform electricity into mechanical work, but there’s another type of motor, the electrostatic motor, that works differently. Instead of using magnetism, electrostatic motors uses high voltage to attract and repel parts of the motor, causing them to turn. There are many ways of making such motors, but most tend to have very low strength and torque. There are the exception to this rule though, and in these videos from RimstarOrg one such exception is studied in detail. It is called the “Corona motor” and apart from being cheap to build, it also have high enough strength and torque to be a viable motor for practical applications! The downside is that it needs very high voltages, and if you try this build, be extremely careful not to get a shock! And if all possible, avoid using high voltage transformers that plug into the wall socket. They can kill. We are not kidding.
Do you consider yourself to be an open-minded person? Open-minded enough to entertain the idea of peeling potatoes with a toilet brush? It might sound like toilet humor, but the fact is that the stiff bristles of a toilet-brush is perfect for peeling potatoes in a jiffy! Whats that, you don’t believe us? Then just watch this video from CrazyRussianHacker and be amazed! One warning though: please use an unused toilet brush, or the result will taste like shit. (Pun intended)
P.S. You’re never to old for toilet humor!
The art of dovetail joint making is quite tricky, as we can see in this video when Adam Savage from Mythbusters tries to learn this particular craft while teaching it to Will from Tested.com. Even though he doesn’t end up with a perfect joint, he talks about all the theories and techniques he has found in his research. Since he is planning to eventually build a sea chest with “Like ten dovetails on each side, it’s like….mind-blowing”, Crafters University wish him the best of luck in perfecting his dovetail joint crafting skills.