User manual

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{
pinMode(8,OUTPUT);//set pin8 output
}
void loop()
{
int i;//define i
while(1)
{
i=analogRead(5);//read voltage values of pin5
if(i>200)//if more than 512（2.5V）
{
digitalWrite(8,HIGH);//light up led lamp
}
else
{
digitalWrite(8,LOW);//go out led lamp
}
}
}