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The American inventor presented his invention revolutionizing telecommunication at New York University in 1837.
The device that transmits human voice as electrical signals was invented by Bell in 1876.
A fuel cell provides environment-friendly electric energy produced by the chemical reaction between oxygen and hydrogen.
This animation demonstrates how a CRT television works.
This animation demonstrates how cell phones work.
A type of rotary engine of high efficiency
This animation demonstrates the structure and operation of digital cameras.
DC motors consist of a permanent magnet and a coil within the magnet, with electric current flowing in it.
This animation demonstrates the structure and operation of different types of optical disc drives.
Computer hard disk drives are devices of magnetic data storage.
In alkaline batteries electric current is generated by electrochemical reactions
Inventions in the 18th century resulted in huge advances in the development of the textile industry.
This animation demonstrates how an escalator works.
These tools, revolutionary even in their simplicity, are still in use today.
Stirling engines are also known as external combustion engines. Unlike internal combustion engines (e.g. Otto-engine), here combustion takes place outside...
A differential allows the driven wheels of a car to rotate at different speeds when the car is turning.
Tower cranes are machines used for lifting loads weighing up to several tonnes.
This animation demonstrates the design and operation of a traditional cinema projector.
An air conditioner cools the air inside by drawing heat away and releasing it outside.
A transformer is a device used for converting the voltage of electric current.