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Portable solar cooker

This DIYs project is a good way to discover the power of the Sun, and the use of a renewable energy to cook without polluting or increasing deforestation.   The portable solar cooker uses 3 principles: the greenhouse effect, the concentration of light with reflective panels and the ability of black ... »
renewable, polluting, deforestation, greenhouse, reflective
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Difficulté
Durée2h 30 min.
Date15.05.2013
Langue(s)

Trammel of Archimedes - ellipsograph

The trammel of Archimedes is a very amusing and ingenious device which can easily draw an ellipse.   The movement of this device is extremely interesting to observe: two short bars perform some back and forth movements in two perpendicular guides. They are both connected to the same bar which moves ... »
archimedes, ingenious, ellipse, observe, perpendicular
Note
Difficulté
Durée2h 0 min.
Date03.05.2013
Langue(s)
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