ESP32 Smart LED Matrix Clock (MAX7219 + Sensors)

A compact and smart LED dot-matrix clock powered by ESP32-C3 Mini, featuring a MAX7219 8×32 display, environmental sensors, and automatic brightness control.

Designed specifically for this custom 3D-printed enclosure.

Case Versions

- Classic — flat lid (best for maximum readability)  
- Crystal — textured transparent lid (soft diffusion effect)

Features

- NTP time sync via WiFi  
- Rotating display: time → date → temperature → humidity  
- Night mode (e.g. 00:00–08:00)  
- Auto brightness via KY-018 photoresistor  
- Animated transitions  
- Internal LED glow through the case  

Components

- ESP32-C3 Mini  
- 4× MAX7219 8×8 LED matrix (FC16)  
- DHT22 temperature & humidity sensor  
- KY-018 light sensor  

Assembly

- 10× M3x8 mm screws  
 - 8 for case assembly  
 - 2 for ESP32 mounting  
- 10× M3 threaded inserts

Firmware & Setup

Full source code, wiring diagram, and setup guide:  
[https://github.com/Fomicha/home-lab/tree/main/makerworld-clock](https://github.com/Fomicha/home-lab/tree/main/makerworld-clock)

Printing Tips

- PLA or PETG  
- 0.2 mm layer height  
- No supports required