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Scoop.it!
This simple timer sits next to your hand soap dispenser. It has a sensor on top that detects when you take your hand in front of the soap dispenser. Then it starts counting down 20 seconds, lighting up one LED after another. Once the green LED turns on, you have washed your hands long enough to kill most of the germs, and you can wash the soap off with water. 
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Scoop.it!
Descarga el Diagrama Esquemático: https://1drv.ms/u/s!AlcS4zuyKJkWnFfj8... Descarga el Codigo de Programación: https://1drv.ms/u/s!AlcS4zuyKJkWnFgjm...
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