Building one is a very rewarding experience, but it has a certain level of difficulty. However, [Attila Blade]’s version of a free-piston type Stirling engine is simple enough to be built in a ...

DIY Simple DC Motor / How to Make a Simple dc Motor ...

Being a simple demo, the brushes are probably not as robust as in a real motor, but for understanding how it works, it is a great demonstration. If you’d rather build a brushless motor ...