Content for MAX7219

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.

Driving a Salvaged VFD With MAX7219 and an Arduino

“You can get your hands on some very interesting components when disassembling old electronics. One such I’ve found was this VFD (Vacuum Fluorescent Display). Trying to reverse-engineer the controller was, however not the way to go as all ICs …

Arduino matrix scrolling weather station and Clock with BME

“How to make a scrolling weather station that displays the temperature, air humidity and relative atmospheric pressure, and Time. Story From one of my previous projects (Bluetooth-controlled scrolling text), I have a finished 8x56 LEDs matrix consisting of 7pcs MAX7219 …

Driving a VFD with MAX7219

“The process of making a salvaged VFD Arduino-friendly. You can get your hands on some very interesting components when disassembling old electronics. One such I’ve found was this VFD (Vacuum Fluorescent Display). Trying to reverse-engineer the controller was, however …

Create text animations with Parola Library for Arduino

“Make cool looking text animations/transitions on 8x8 dot matrixes controlled by MAX7219 modules”

Smoke detector using MQ-2 Gas sensor

“In this tutorial, we will see how to make a smoke detector that will help prevent smoking in public areas. Smoking is extremely hazardous to health. Even in the smoking areas, people intend to smoke. This passive smoke is unhealthy …

Printing to a Serial LED Display

“This article describes a simple routine to allow you to use a low-cost eight-digit LED module to display formatted data from a microcontroller project The routine will work with almost any microcontroller; as a demonstration of the routine I’ve …

Project  cwymriad

cwymriad

“An electronic sound and light sculpture cwymriad is a ring modulation based sound sculpture which displays the output signal on an 8x16 LED matrix. ‘cwymriad’ is based on a dual ring modulation circuit in which the ESP32 creates both the …

Arduino Chronograf

“This project is for a homemade chronograph and this device is used to measure muzzle speed which basically is the speed of bullets. If you remember, a few weeks ago I’ve made a coil gun project, which by the …

Arduino Race Timer, Lap Counter, and Controller

“Race controller for slot car or drone racing with dedicated racer gates. Cheap, portable, accurate, and easy to build. This is an Arduino based project that implements an inexpensive, reliable, race game controller that can be used for timed racing …

(Yet Another) Dot Matrix Clock

“A simple and eye-catching Dot Matrix Clock/Calendar showing also temperature and Humidity with a practical 3D-printed enclosure This is a very simple yet large Dot-Matrix Clock-Calendar running MD_Parola library. Many friends seen this clock in my garage and in …