v5yZwABLuY

[Lichuang Development Board] Chao’s smart car

Overview

## 功能
1. 蓝牙遥控
2. 超声波避障
3. 5路红外寻迹（扩展板太大，赛道太小，导致3路红外加班，2路看戏）
4. 电池低电量报警（7v以下蜂鸣器快速响）
## 部分原理图说明
![image.png]

电源部分加了一个SMAJ5.A的瞬态二极管防止浪涌，6V 1A的自恢复保险丝防止过流。1117输出端的10uF滤波电容串联0电阻增加esr（用不起钽电容）
![image.png]

电机驱动选择了TC118S,立创商城购买一个只要0.35,超便宜有没有。代价就是工作电压小于7v

## 实物展示说明
![image.png]

开发板顶面用的是立创面板打印的黑色亚克力（白嫖，每月500份好像）
![image.png]

- 轮胎和n20的固定座是T网下载的模型打印，打印材料是必应家的pla-fc（测试料白嫖，放了有一段时间拉丝正常）。没有3d打印机的可以用立创三维猴的光固化打印，更好看一点。
- n20电机是淘宝立华家购买的二手电机，去除邮费1.17一个（年后涨价了）

## 注意事项
1.请大家使用梁山派制作扩展板的时候最好将调试端口单独拉出来，买开发板送的daplink插接线太容易断了，最后需要插拔开发板用杜邦线下载程序
2.蓝牙模块这边注意使用3.3v还是5v,淘宝买的hc-05介绍说支持3.3v供电，但是实际启动不了。
3.为了节省物料，将整个5V网络连接在一起，导致电机满速运转时蓝牙模块工作不正常，自食其果了属于，用两个LDO分别供电应该会好一点
4.扩展板没必要这么大，小一点更好看

Design Files

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Update:2025-05-21 01:20:39

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