走马观花

LED dot matrix clock

Overview

LED dot matrix electronic clock based on 51 microcontroller.

Based on STC15W4K series ultra-high-speed 51 microcontroller.
All components are accommodated on a double-sided panel of 100*40mm.
DS3231 real-time clock (RTC) chip, the annual error does not exceed 5 minutes.
Dot matrix resolution: 24*8
The seconds are displayed via the progress bar at the bottom.
The display direction is determined by gravity sensing.
Powered by micro-usb interface.
CR1220 backup battery, the time will not stop when the power is cut off.
The PCB has reserved DS18B20 temperature sensor interface and buzzer control interface, which can be added as needed.
Source code is provided.
A 3D model of the shell is provided, and you can use a 3D printer to print the shell yourself.

Demo video: https://www.bilibili.com/video/av62056757

Design Files

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Update:2025-06-24 11:34:44

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