0.8 inch digital tube clock

basic situation

By chance, I got a batch of 0.8-inch green digital tubes, and the pins were different from the pins I could buy from a certain store. They were not 10P, but the astonishing 18P. So I started this project in the spirit of not wasting it. come out;

Function realization

• [x] Display time
• [x] Hourly time chime
• [x] alarm clock
• [x] Countdown
• [ ] Lithium battery powered

Project Introduction

The well-known ESP-12F module is used for powerful driving. The display part is driven by Tianwei's TM1650 . At the same time, the chip also comes with keyboard scanning, which can save the IO port of the main control. This time, 3 of the buttons are used. , saving a lot of trouble;

The clock chip still uses the DS1302. Because it has WiFi support, it can update the time regularly through NTP, so there is no need to consider accuracy issues, so there is no need to consider the sky-high price of the DS3231;

The onboard TP4065 module is powered by a lithium battery, so you don’t have to worry about charging at all.

At the same time, there is also a dual power switching circuit, which uses USB power when charging and usually supplies power to lithium batteries.

Physical map