When a GPIO pin is in input mode and not connected to 3.3 volts or ground, the pin is said to be **floating**, meaning that it has no fixed voltage level. That's no good for what you want, as the pin ...

When measuring the resistance between the 3.3V pin and GPIO 45 we can confirm that the 10KΩ resistor is there. Because of that, the internal pull-down resistor is not enough to pull the line low when ...

A pull-down resistor is a resistor connected between a signal line (e.g., input pin of a microcontroller or transistor gate) and ground (GND). Its primary role is to ensure that the signal line ...

Understanding Pull-Up and Pull-Down Resistors: Why They Are Crucial in Microcontroller Circuits In digital electronics, especially when working with microcontrollers (MCUs), ensuring that input ...

Even this relatively simple circuit arrangement has subtleties that affect performance. Part 1 explored the role of pull-up and pull-down resistors to ensure that the binary (digital) circuit points ...