MAX7219

Serially Interfaced, 8-Digit, LED Display Drivers The MAX7219/MAX7221 are compact, serial input/output common-cathode display drivers that interface microprocessors (µPs) to 7-segment numeric LED displays of up to 8 digits, bar-graph displays, or 64 individual LEDs. Included on-chip are a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8x8 static RAM that stores each digit. Only one external resistor is required to set the segment current for all LEDs. The MAX7221 is compatible with SPI™, QSPI™, and MICROWIRE™, and has slew-rate-limited segment drivers to reduce EMI.

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How to DIY 32 Band LED Audio Music Spectrum Analyzer Using Arduino Nano at Home #arduinoproject

“Today we will make a 32 band LED Audio Music Spectrum Analyzer at Home using Arduino, it can shows frequency spectrum and play muisc at the same time. Note The max7219LED must be connected in front of the 100k resistor …

WiFi NodeMCU ESP8266 Google Clock

“A simple easy WiFi clock using “Google” timestamp, with temperature and humidity. Oct2020 update: bug fixing and automatic brightness I made several clock with arduino but was looking simple, easy, light, synchronized in real time with internet clock different than …

Pixie - Let Your Plant Smart

“Pixie was a project developed with the intention of making the plants we have at home more interactive, since for most people one of the challenges of having a plant at home is to know how to take care of …

Yet another dot matrix clock

“NTP synchronized dot matrix clock showing temperatures and humidity.. Optionally the time source can be GPS. That is what some readers may think, what? Another dot matrix clock? In order to combine inside/outside thermometers with a nice and precise …

Spectrino: TinyML Arduino & IoT Based Touch-Free Solutions

“Spectrino - Arduino devices that can be implemented on a wide spectrum of touch-free tinyML based housing and society systems. The pandemic has introduced a constraint to social interaction: distance. Considering this factor of risk, countries all over the world have …

Treasure hunt Game with Arduino

“You will learn how to build your treasure hunt game with Arduino. Do you know how to create the treasure hunt game? This game is very fun and I will teach you how to create this game with Arduino. Are …

Pong Tennis With LED Matrix, Arduino and Joysticks

“This project is intended for beginners and experienced tinkerers alike. At a basic level it can be done with a breadboard, jumper wires and stuck to to a piece of scrap material (I used wood) with Blu-Tack and no soldering …

Li-ion Battery Bluetooth Scoreboard

“The Project is based on my Instructables from the last year: Bluetooth Table Tennis Scoreboard The Scoreboard is dedicated for amateur sport fans and table tennis player But it is not applicable just for table tennis. Can be used for …

Interactive Minecraft Do Not Enter Sword/Sign (ESP32-CAM)

“There are really several reasons why this project came into existence: 1. As an author of cooperative multitasking library TaskScheduler I was always curious how to combine the benefits of cooperative multitasking with the benefits of pre-emptive one. There are …

Space Hinvaders

“A micro game with LED matrix where the pixels used for the entire game are about those of a single sprite of the original invader. I really like old video games, and I had never found a space invader style …