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Telegraph (Samuel F. B. Morse)

The American inventor presented his invention revolutionizing telecommunication at New York University in 1837.

Telephone (Alexander Graham Bell)

The device that transmits human voice as electrical signals was invented by Bell in 1876.

Fuel cell

A fuel cell provides environment-friendly electric energy produced by the chemical reaction between oxygen and hydrogen.

How does it work? - CRT television

This animation demonstrates how a CRT television works.

How does it work? - Cell phone

This animation demonstrates how cell phones work.

Wankel engine

A type of rotary engine of high efficiency

How does it work? - Digital camera

This animation demonstrates the structure and operation of digital cameras.

DC motor

DC motors consist of a permanent magnet and a coil within the magnet, with electric current flowing in it.

How does it work? - Optical disc drives

This animation demonstrates the structure and operation of different types of optical disc drives.

Hard disk drive

Computer hard disk drives are devices of magnetic data storage.

Alkaline batteries

In alkaline batteries electric current is generated by electrochemical reactions

Inventions in the textile industry, 18th century

Inventions in the 18th century resulted in huge advances in the development of the textile industry.

How does it work? – Escalator

This animation demonstrates how an escalator works.

Mesopotamian inventions (3rd millennium BC)

These tools, revolutionary even in their simplicity, are still in use today.

Stirling engine - hot-air engine

Stirling engines are also known as external combustion engines. Unlike internal combustion engines (e.g. Otto-engine), here combustion takes place outside...

How does it work? - Differential gear

A differential allows the driven wheels of a car to rotate at different speeds when the car is turning.

How does it work? – Tower crane

Tower cranes are machines used for lifting loads weighing up to several tonnes.

How does it work? – Cinema projector

This animation demonstrates the design and operation of a traditional cinema projector.

How does it work? - Air conditioner

An air conditioner cools the air inside by drawing heat away and releasing it outside.

Transformer

A transformer is a device used for converting the voltage of electric current.

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