A super easy project with Arduino and LED matrix - for the Arduino to stay happy, it just needs to be approached.
Download library:
EXPANDED TECHNICAL DETAILS
Visual Proximity Dashboard
This project combines distance sensing with high-density LED graphics to create a dynamic "Safety Gauge" or industrial parking assistant.
- SPI Matrix Addressing: Uses the MAX7219 driver to manage the 8x8 LED matrix via a high-speed SPI bus. The Arduino updates the entire 64-LED array with a single transaction.
- Real-Time Level Metering: The Arduino captures distance from the HC-SR04 and maps it to a vertical "Fill Level" on the matrix. As an object gets closer, the LED "Bar" rises, providing a clear visual representation of spatial depth.
Aesthetics
- Scrolling Alert Text: When the distance is critically low, the Arduino transitions from a bar-graph to a scrolling "STOP" or "WARNING" text animation across the LED matrix.
ข้อมูล Frontmatter ดั้งเดิม
title: "Arduino HC-04 and 8x8 Matrix MAX7219"
description: "Get close and the Arduino is happy; go away and he gets sad."
author: "viniciuslindoss"
category: "Screens & Displays"
tags:
- "led matrix"
- "sensor"
- "ultrasonic"
views: 18329
likes: 10
price: 1120
difficulty: "Easy"
components:
- "1x 8x8 MAX7219 LED Matrix"
- "1x Jumper wires (generic)"
- "1x Arduino UNO"
- "1x Ultrasonic Sensor - HC-SR04 (Generic)"
tools: []
apps:
- "1x Arduino IDE"
downloadableFiles: []
documentationLinks: []
passwordHash: "cd785b8ef1d892394dcaa8cbae77736911a6882b2f0005dab0057f6fafab3b65"
encryptedPayload: "U2FsdGVkX1+WGhJqjzUWmAN27o5pHvoz8Fbmj/2gcV0/W/GZxhvdfC8Xqed1bzevVOzw0Zkmkeg+x9pzfWYEGveTurJABA5LFc9tZHQzz80="
seoDescription: "Arduino project using HC-04 and 8x8 Matrix MAX7219 to display happy or sad faces based on proximity distance."
videoLinks: []
heroImage: "https://cdn.jsdelivr.net/gh/bigboxthailand/arduino-assets@main/images/projects/arduino-hc-04-and-8x8-matrix-max7219-646080_cover.jpg"
lang: "en"
