Oldham clutch invented in 1821 by John Oldham

The cam-disc clutch or Oldham mechanism is a method of transmitting torque between two parallel but not coaxial shafts.

The mechanism consists of three discs, one connected to the input shaft, one connected to the output shaft, and the middle disc connected to the other two by a shoulder-to-hollow connection.

Alternative charger

Interesting setup for those who are afraid of skydiving, but want to feel the spectrum of emotions

Tangerine explosion at 7000 frames per second

Vacuum vs. cistern

The phenomena of total reflection

Home aquarium and laser pointer in action

Visualizing gravitational waves

The cat's acquaintance with static electricity.

Quite an interesting and surprising experience.

When you heat quartz to its melting point, it glows white.

Create a three-dimensional image over a real object using just two parabolic mirrors

One of the first vacuum tunnel tests in South Korea

The Tesla transformer is a device invented by Nikola Tesla and bearing his name. It is a resonant transformer that produces high voltages of high frequencies.

53,000 lumens flashlight.

A prime example of why people need kneecaps.

Non-Newtonian fluids are the best toys against stress!

A unique bridge without a single nail - Da Vinci Bridge!

A parabolic reflector and a visual demonstration of its properties.

So-called recursion.

One of the funniest videos of mankind: people, for the first time on the Moon, trying to cope with the new gravity.

The master of the samurai sword cuts through the ball at 120 km/h.