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Cell phone alarm

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Uploaded by on May 25, 2011

A cell phone alarm I made for checking if my bike is being touched or stolen by someone. The core of the project is a very simple but effective vibration sensor and a cmos 555 timer. It can be used in many situations not only on bikes and it's a good way to recycle obsolete electronics devices.

Btw, the glass of water is just to show you how sensitive is to vibrations!

Come back soon for schematics.

Un semplice ma efficace allarme fai-da-te realizzato per la mia bici che si basa su un sensore di vibrazione e un l'integrato 555 in versione cmos. Può essere utilizzato naturalmente in altre situazioni oltre che con la bicicletta ed è comunque un buon modo di riciclare apparecchiature obsolete.

Il bichiere d'acqua serve a dimostrare la minima sensibilità alle vibrazioni!

Pubblicherò presto lo schema usato.

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