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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)

Anti-monster flash light & buzzer

Building this very special Anti-monster flash light & buzzer is a nice way to experiment an electrical circuit a bit more complex than the usual battery/bulb/switch one.   Beware that once completed, this is a very noisy device...   This DIYs project uses a very energy efficient ... »
flash, experiment, bulb, noisy, emitting
Note
Difficulté
Durée2h 0 min.
Date03.05.2013
Langue(s)
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