I want to detect change in on of digital pins of Arduino . First step is connecting digital pin to ground or vcc according to internal condition of pin.
So in ARDUIO i set one of digital pins (GPIO) to "OUTPUT" then i set it to "INTERNAL PULLUP" ... When i connect it to GND i can detect change without problem.
I want to know if i dont use resistor between digital pin and GROUND will it damage ARDUINO in long time ?