Telephone (Alexander Graham Bell)

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

Related extras

How does it work? - Radio

This animation demonstrates how radios work.

How does it work? - Water tower

This animation demonstrates the structure of water towers.

Printed circuit board

This animation demonstrates the structure of small, mass-produced circuit boards.

How does it work? - Mobile phone

This animation demonstrates how mobile phones work.

How does it work? – Cinema projector

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

Telegraph (Samuel F. B. Morse)

The American inventor presented his invention revolutionising telecommunication at New York...

Daguerreotype

The first commercially successful technique of photography was invented by the French Louis...

Optical instruments

A wide variety of optical instruments are in use today, ranging from microscopes to telescopes.

Added to your cart.