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Overview In this tutorial, you’ll learn how to use a 8×8 dot matrix LED module with IC MAX7219. At the end, you’ll be able to display any shape or text on one or more Dot matrix easily, fixed or scrolled, using only 4 digital pins of arduino. What You Will Learn What dot matrix LED is How to use Dot matrix LEDs with Arduino Displaying specific shapes on a Dot matrix LED module Casca...

Overview Which feature of RGB LEDs has made them an attractive and practical component in Electronics and Lighting Industry?Answer: Their unique feature of regulating the ratio of the three primary colors (red, green, and blue) to generate a desired color with one LED. An RGB LED has a common pin as well as three pins for red, green, and blue colors. We can combine these primary colors to generate countless colors by controlling these pins with a PWM pulse signal. (The number of colors changes depending...

Overview OLED Displays: A Beginner’s Guide to Display Text, Image & Animation Using Arduino. What You Will Learn How OLED displays work How to interface OLED displays by Arduino How to display any text or image on OLEDs How display simple animations OLED; What's the theory? An organic light-emitting diode (OLED) is a high-contrast and high-resolution display, making it easy for users to be readable. This kind of displays doesn’t have a ...

Introduction Have you ever had difficulties while uploading code to an ESP32 board? This article deals with one of the most common errors that occurs during code uploading: “Failed to connect to ESP32: Timed out waiting for packet header.” To tackle this problem, we will introduce two methods. Steps to Troubleshooting “Failed to connect to ESP32” Error First of all, disconnect all wires connected to the ESP32 board. This simple thing might solve the issue! (Because the serial or USB pins could be in...