Video 6: Understanding GPIO Inputs, Pull Up and Pull Down Resistors¶
Join Paul McWhorter in this comprehensive tutorial as he explains the importance of pull-up and pull-down resistors in microcontroller circuits, demonstrating practical implementations on both Raspberry Pi platforms for GPIO input handling.
GPIO Input Basics: Learn how to read digital inputs from GPIO pins on microcontroller platforms.
Circuit Setup: Follow along as Paul demonstrates the physical setup of circuits with push button switches, resistors, and microcontroller boards.
GPIO Pin Configuration: Understand how to configure GPIO pins for input mode and read input values in Python (for Raspberry Pi) code.
Preventing Floating Inputs: Discover why it’s crucial to avoid floating inputs and how pull-up or pull-down resistors can stabilize input readings.
Pull-Up Resistor: Ensures a known logic level when the switch is open by connecting the input pin to a high voltage through a resistor.
Pull-Down Resistor: Ensures a known logic level when the switch is open by connecting the input pin to ground through a resistor.
Functionality: Demonstrates how the circuit behaves with the switch open and closed, affecting the logic level read by the input pin.
Implementation: Provides step-by-step instructions on physically setting up the circuit on a breadboard using wires, a push button switch, a resistor, and a microcontroller board.
Homework Assignment: Encourages viewers to practice controlling an LED with a push button switch and sharing their solutions on YouTube, linking back to the tutorial video.
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Homework Solution