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Catapult

This is a simple catapult model built with some very common objects. This weapon of war was used in Greek and Roman Antiquity as well as in the Middle Ages. It could launch heavy stone bolders through a system of spring and without explosives. This DIYs project is a good way to introduce children to ... »
catapult, weapon, explosives, mechanics
Note
Difficulté
Durée0h 30 min.
Date09.09.2013
Langue(s)
français english

Solar hot water panel

The construction of a solar hot water panel helps to understand how it is possible to heat water with the Sun. The basic principle is to circulate water in a black pipe placed behind a glass exposed to the Sun. Thanks to the greenhouse effect and the black colour that absorbs most of the Sun's rays, it is ... »
circulate, pipe, greenhouse, absorbs, rays
Note
Difficulté
Durée2h 30 min.
Date31.05.2013
Langue(s)

Bicycle magnetic headlight

Bulding a bicycle electricity generator helps to understand how it is possible to produce electricity from a magnet, a copper wire coil and a movement. This technique found in traditional bicycle dynamos is also used in electric power stations. Unfortunately less bicycles are equiped with ... »
bicycle, generator, magnet, wire, coil
Note
Difficulté
Durée3h 0 min.
Date24.05.2013
Langue(s)

Solar boat 2

Concept   Building a solar boat is a good way too experiment the use of photovoltaic solar cells. Solar boats are an ecological means of transportation because they use the sun, a renewable and environmental friendly energy. In order to navigate by night and when the sun is too weak, solar boats ... »
experiment, photovoltaic, ecological, renewable, batteries
Note
Difficulté
Durée3h 30 min.
Date16.05.2013
Langue(s)

Solar house

Building a solar house model helps to understand how it is possible to use the power of the Sun to save energy or even to be completely independent from the energies we normally use in our buildings. Even if they are still rare, some buildings already use only renewable energies. These 'autonomous ... »
energies, renewable, air-tight, illustration
Note
Difficulté
Durée4h 0 min.
Date16.05.2013
Langue(s)
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