DIY Clock Perpetual Calendar with 2.4-Inch Display
If you are interested in a DIY clock perpetual calendar, you might want to check out this article.
If you just happen to have a 2.4-inch screen with button backlight, it is perfect for making a clock.
If you just happen to have a case, you can drill holes in the case.
If you just happen to have a 4000mAh battery, the size is suitable and it fits perfectly.
The MCU used is STC15W408AS, the clock chip is a salvaged 8025T, and two adapter boards are connected together. The temperature detection uses a DS18B20 sensor.
The data cable is led out from the charging and protection board, so you can program it through the charging port.
Assemble everything together to see the result.
It still looks very good.
Overall powered on.
Backlight turned on.
Finished. You are quite satisfied with the result. It can display year, month, day, hour, minute, second, weekday, lunar calendar, room temperature, and battery voltage. In addition, the MCU power consumption reaches more than ten milliamps. So a 4000mAh battery cannot last for many days. You can enable sleep mode, refreshing the time approximately every 8–9 seconds. Of course, you can also press a button to enter normal mode at any time. In sleep mode, it can last about 3–4 months, which makes it much more practical.
