Wouldn’t it be great if you could mark stuff with your name, slogan or logo in a way that wouldn’t wear of? You need a branding iron! But instead of ordering really expensive ones, you should consider making your own. As this tutorial from John Heisz shows, it isn’t tricky at all. With just an old metal wrench as material and simple tools like drills, files, a hacksaw and an angle grinder, John Heisz makes his own branding iron with the name of his website “I build it.ca” with excellent results! Just watch and learn how you could make your own permanent stamp. And if you need help doing the pattern transfer, check out our How to transfer inkjet prints to wood post, it works on almost any surfaces.
We all uses DC motors in one way or another. Even if you’re not building a machine that have DC motors, you still engage them when you use a machine to brush your teeth, shave your hair or get a buzzing sound from your mobile phone. But do you know how they work? Just check this video from Learn Engineering and see if you actually know all the detailed science that goes into making a modern DC motor.
When you need to choose a material, it is essential to keep in mind the environment in which the material is going to be used. Such a seemingly small matter as temperature can cause a complete breakdown of parts, if they are made from the wrong materials. On the other hand, you will rarely find a material that has perfect properties. In the end you will need to know enough about material properties to choose which material will suit your purpose best. Here, Dr. Ainissa Ramirez from Yale University demonstrates how temperature can change the ductility of materials like rubber and steel with catastrophic results.