How to use - A coins battery
To ensure a better connection use an electric connector.
The led can produce some light for several for hours!
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Do-it-yourSciences, a realization of the Juvene Foundation in collaboration with the Espace des Inventions
The development has been supported by Info-Energie (campagne vaudoise d'information dans les écoles) and by SIG (Services Industriels de Genève).
