A pull-down resistor keeps the Hall sensor’s signal at zero when no magnet is near. Without it, the sensor could get confused and give random on/off signals. It makes sure the circuit can clearly tell when a magnet is present or not.
Courses and lessons with this Tutorial
This Tutorial is used in the following courses and lessons
Build a DIY Rotating LED Clock Display – For Parents and Kids (Online and Self-Guided)
Discover the fun of DIY electronics with your child in this self-paced, beginner-friendly online course, where parents and kids work together to build a rotating LED strip display!
Designed for those with no prior experience, this project-based course walks you through the entire process of assembling a spinning LED display that uses persistence of vision to create a glowing clock.
- 60
- 0:00
- 56
Sensing the Finish – The Last Solder
Radar Gun
The goal of this lesson is to attach the sensor that measures the speed of the LED display. This is the last lesson where you’ll need to do any soldering!
- 4
- 2
- 3
- 3d_rotation 0