# nixie_tube_clock

**Repository Path**: shawnquxp/nixie_tube_clock

## Basic Information

- **Project Name**: nixie_tube_clock
- **Description**: 6 个辉光管分别显示时,分,秒，两个氖气灯作为时间分隔小点。每次电路板上电后尝试通过 NEO-6M GPS 模块同步一次 UTC 时间并存储到 DS3231 RTC 时钟模块中。之后即可长期通过 RTC 时钟模块获取并显示时间，即使 GPS 不再使用。
- **Primary Language**: Lua
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2024-08-12
- **Last Updated**: 2024-08-12

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# GPS Nixie Tube Clock



# README.md

- zh_CN [简体中文](README.md)



## Preface

This open-source project is based on FlexLua low-code microcontroller technology, eliminating the need for complex microcontroller C language development. Even beginners can easily develop various feature-rich, stable, and reliable IoT hardware with zero threshold using FlexLua. For more learning tutorials, please refer to the FlexLua official website (flexlua.com).

## 1. Function Introduction

6 neon tubes respectively display hours, minutes, and seconds, with two neon lights serving as time separators. After each power-up of the circuit board, attempt to synchronize UTC time once through the NEO-6M GPS module and store it in the DS3231 RTC clock module. Afterwards, time can be obtained and displayed through the RTC clock module for a long time, even if GPS is no longer used.



![pic1](img/pic1.jpg)



## 2. Hardware Solution Introduction

- ShineBlink C2M low-code microcontroller: Used to run the entire system's Lua code
- DS3231 RTC clock module: Equipped with CR2302 battery, can store and maintain real-time UTC time for a long time
- NEO-6M GPS module: Used to obtain real UTC time via GPS satellites
- CD4514BM: 4-to-16 decoder chip
- 5V-170V neon tube boosting module: Used to drive neon tube clocks, using the Japanese TTRN-060S transformer, available for purchase on Taobao

![pic2](img/pic2.jpg)





## 3. Hardware Schematic



### Top Board

![Sch2](img/Sch2.png)



### Bottom Board

![Sch1](img/Sch1.png)



> Note: If powered by USB 5V, the SB-Q01 12V to 5V module does not need to be soldered.



## 4. Code Download and Power-Up Operation

### Code Download:

Step1: Set the S1 (Power Switch) to USB_5V (to prevent HV_5V from boosting to 160V and affecting program download)

Step2: Connect USB1 port to the computer using a Micro USB data cable

Step3: Set the S2 (Prog Switch) to 3V3, when the TF_ON pin is high, the ShineBlink C2M enters download mode, and a virtual U disk of about 1.6M will appear on the computer

Step4: Drag the main.lua source code directly into the U disk, then set the S2 switch to GND

### Power-Up Operation:

Step1: Keep the S1 (Power Switch) at VOUT_5V (to boost HV_5V to 160V to drive the neon tube)

Step2: Keep the S2 (Prog Switch) at GND

Step3: Provide 5V working power to USB2 port via Micro USB cable