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Solar flashlight

Building a solar torch (flashlight) helps to understand how it is possible to store the energy of the Sun and use it later at night. photovoltaic cells transform the energy of the sun in electricity that can be stored in a rechargeable battery. Photovoltaic cells are now widely used and can be even ... »
torch, flashlight, photovoltaic, transform, rechargeable
Note
Difficulté
Durée2h 30 min.
Date17.05.2013
Langue(s)

Design and energy saving lamp

Building a lamp with energy saving bulbs demontrates that it is possible to create a nice looking lamp delivering a good an strong light while consuming 5 times less energy. This model uses two bulbs in order to vary the light intensity. This is usally impossible with standard energy saving lamps. ... »
lamp, bulbs, intensity, lamps, lighting
Note
Difficulté
Durée2h 30 min.
Date13.05.2013
Langue(s)

Pet-Star water rocket car

The Pet Star water rocket car is an environmental friendly vehicle.   A Pet bottle is used to stock air and water. The air is pressurised with a bicycle pump . The water is expelled because of this great pressure and pushes the car forward (action<>reaction principle).   This DIYs project helps to ... »
rocket, pressurised, bicycle, pump, pushes
Note
Difficulté
Durée10h 0 min.
Date06.05.2013
Langue(s)
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