I am using the Attiny85 programmed in the Arduino IDE. I was able to activate the internal pull-up resistors on pins 1 and 3, and the voltage I measured on them was close to the supply voltage of 5V. However, when I activate the internal pull-up on pin 0 with pinMode(0, INPUT); digitalWrite(0, HI…

Attiny85 using Arduino IDE, pull-up resistor voltage is too low

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