Arduino Tutorial 27: Understanding Pushbuttons and Pull Up and Pull Down Resistors

Being able to add push buttons to your projects adds important new capabilities to your prototypes. It is a clever way you can get input from a user. You could imagine using push buttons to turn something on or off, or they could be used to set motor speed or direction. In order to incorporate buttons into a project, you need to understand the concept of pull up and pull down resistors. In this tutorial we show you how to include buttons in a project, by demonstrating a simple on/off function on an LED.

If you want to follow along at home, you can order the Arduino Kit we are using HERE.

This is the code we used in this project to switch the LED on and off.


9-Axis IMU LESSON 4: Plotting Serial Data from Arduino with Control of Axis Scale

As this project continues it is very important for us to be able to quickly and easily plot data streaming from the sensor. The Arduino Serial Plotter has some real limitations, we recommend a simple “Serial Plotter” tool that can be downloaded. In this video we take you step by step through the download and installation process, and then an overview of how to use the tool.

Arduino Tutorial 26: More Fun with Photo Resistors

In this lesson we create an audible signal where the tone of the signal is proportional to the brightness of the light in the room. We use a photoresistor to measure the light in the room, and then use a passive buzzer to create the audible signal. The video shows you how to hook everything up, and the code we use is below. Your code might be a little different, as the math will depend on the light values where you are.

If you want to follow along at home, you can order the Arduino Kit we are using HERE. The nice digital voltmeter used in the lesson is available HERE.