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An Electric eel can produce an electric shock of up to 650 volts at one ampere.
 

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INT0 taster AVRWhen reading pin state it is often needed to react very fast on pin state change.
For this purpose external interrupt is used. External interrupt occurs when dedicated pin changes state. It can be triggered on rising, falling, or both edges of signal state. In this example we will use external interrupt  of AVR microcontroller INT0.  

 

 

 

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