maximum volt input from a digital pin

Other Hardware General Electronics
1 
int pin8 =8;
int pin7=7;
void setup() {
  pinMode(pin8,INPUT);
  pinMode(pin7,OUTPUT);
  // put your setup code here, to run once:

}

void loop() {
  if(pin8=HIGH){
    pin7=HIGH;
    delay(20);
  }
  else {
    pin7=LOW;
  }
  // put your main code here, to run repeatedly:

}

wheat is the maximum input volt i can send to digital pin 8 ?

2

Wheat is the maximum input volt I can send to digital pin 8?

I wouldn't connect wheat to it, unless you are making bread.

Input voltage should be no more than Vcc.

3

PerryBebbington:
I wouldn't connect wheat to it, unless you are making bread.

Input voltage should be no more than Vcc.

i read your comment like 20 times trying to understand what the puck is this guy talking about xD
then i realized i misspelled the first word in my question haha
thank you for your answer so 5v is the maximum.

4

Hi,
What make/model is your controller?

Thanks.. Tom... :slight_smile:

5

TomGeorge:
Hi,
What make/model is your controller?

Thanks.. Tom... :slight_smile:

Arduino Mega 2560 Rev3 original not clone

6

Thank you for your answer so 5v is the maximum.

If it's an Arduino that runs on 5V, yes, but in your original post you didn't say.

7

Hi,
If you have an input voltage higher than 5V, you would need to use a potential divider or some sort of isolation circuit such as an opto-coupler.

Thanks.. Tom.. :slight_smile:

8

thank you great people of the forums

9

If you limit the current you may use higher voltage than the supply voltage.
Note that "5V nominal" may be less or more than 5V.