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JLCPCB:0.8" LED Digital Clock

June 27, 2020 by Catherine Sui

Hope this article can help with you homemade DIY LED clock


LED 钟.jpeg

High precision LED electronic clock based on STM32

Step 1: Description


PCBs were designed and manufactured by JLCPCB by $2 for 5 pcs


1 0.8 inch large LED digital tube, clear display

2 Based on STM32F030F4P6 MCU

3 RTC clock IC adopts domestic SD3078, 3.8 PPM, annual error 2 min.

4 Temperature display

5 Optional alarm and hourly function

6 Optional automatic light sensing

Note: Source code is the TrueStudio project file, please use TrueStudio version 9.3.0 import. If you don't want to modify the source code, download the binaries directly via ST-Link

Step 2: Manufacture Files

Clock Schematic.png

Enclosed the Schematic file, PCB file, and BOM list

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