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Reaction Wheel Inverted Pendulum

Single axis self-balancing reaction wheel inverted pendulum. This thing is inherently unstable and a common challenge in control theory. The mechanical structure is built using only Lego parts. Motor is also Lego. Angle sensor and electronics are not Lego. Enjoy!...

The interesting engineering behind your Car Window

Are you amazed at how easily you can raise and lower your car windows by just pressing a button? The mechanism inside your car window is so compact and smart that the window always moves straight and smooth. Also, you might have noticed that you’re not able to move...