internal pull up r's

code: [select]


void setup(){
  serial.begin(9600);
  pinmode(supfanled, output);           // supply fan led o/p
  digitalwrite(supfanled, high);        // turn on pullup resistors


hi
just stumbled upon internal pull r's, correct place (setup) define internal pull r's?
thank you

set pin mode input instead of output , you're on way.

i know looks wrong writing pin set input mode, that's how arduino works turning on resistors.

code: [select]


void setup(){
  serial.begin(9600);
  pinmode(supfanled, input);           // supply fan led o/p
  digitalwrite(supfanled, high);        // turn on pullup resistors
}


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