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CC-BY-SA-4.0

ESP32-C245无线烙铁

项目说明

ESP32-C245无线烙铁是一款便携自带锂电池供电的无线式电烙铁 使用C245发热芯 支持TYPE-C 快充直接供电和给锂电池充电 支持烙铁温度 电流 电压 功率 等参数的实时测量和显示

功能简介

  1. 支持-100℃ ~ 450℃温度范围测量和温度校准功能
  2. 支持锂电池供电和TYPE-C双电源供电 自动切换供电并给锂电池充电
  3. TYPE-C 输入电源:5~20V/5A PD快充诱骗功率默认: 65W
  4. TYPE-C 接口支持程序下载和快充诱骗供电(通过正反插区分功能)
  5. 3个常用按键进行模式切换和参数设置 1个复位按键用于烧录程序
  6. ST7735 0.96寸 160*80 像素 彩色液晶显示屏 显示各种参数
  7. 支持多种功能设置 掉电保存数据 低功耗休眠20uA和按键唤醒
  8. 锂电池供电时最大加热功率20W 加热速度略慢 350℃ 以上焊接比较吃力 续航也比较紧
  9. TYPE-C供电时最大可用加热功率99W 限流可调

项目信息

  1. 2023年8月 进行ESP32无线烙铁1.0的 原理图 PCB设计 打样和验证功能
  2. 2023年9月 进行ESP32无线烙铁1.1的 原理图 PCB设计 打样和验证功能
  3. 2023年10月 进行ESP32无线烙铁1.1的外壳结构设计并去立创3D打样
  4. 2023年11月正式开始写代码和进行测试 解决部分BUG及完善软硬件和结构外壳设计
  5. 该项目前后一共迭代了2个版本 花费了600多元 进行PCB打样 外壳3D打样和购买元器件
  6. 本项目首次公开,为负熵生之光本人原创 CC BY-SA 4.0 开源项目
  7. 立创开源平台链接:https://oshwhub.com/fj956391150/ESP32-wu-xian-lao-tie
  8. 负熵生之光 2023-11-22

设计原理

  1. 该项目采用ESP32-S3FN8 作为主控 通过ADC采集烙铁热电偶温度信号和电流信号来控制PWM驱动PMOS开关来控制烙铁温度和加热功率
  2. HUSB238-002D芯片用于快充诱骗 不过这颗芯片对快充协议的支持性不是很好 无法诱骗某些充电器输出
  3. TPS61088RHLR用于把3.7V左右的电池电压升压至8V给烙铁供电 来提升加热功率
  4. XB7608AJ用于给锂电池提供过压 欠压 过流 短路等保护功能 SLM6305 用于锂电池充电
  5. LIS3DHTR用于运动检测 判断是否进入深度睡眠模式
  6. GS8552放大器 用于放大烙铁热电偶温度信号和电流信号
  7. 受低端电流采样电路影响 导致工作时电流会影响烙铁热电偶温度信号 因此采用间歇性采样热电偶温度信号 并通过查表来获取温度

功能模式按键

  1. 恒温加热模式:短按K1键来切换待机和工作模式 长按K1键进入深度睡眠模式 短按K2 K3键对设定目标温度 同时长按K2 K3键切换不同模式
  2. 功能设置模式:短按K1键切换不同的功能设置 长按K1键进入和退出更详细的参数设置界面 短按K2 K3键对 功能进行开或关 参数加或减设置
  3. 校准设置模式:短按K1键切换不同的校准参数 长按K1键进入和退出更详细的参数设置界面 短按K2 K2进对参数进行减或加 开或关设置
  4. 深度睡眠模式:深度睡眠模式短按K1键 唤醒进入恒温加热模式界面 在恒温加热模式界面长按K1键进入进入深度睡眠模式

恒温加热模式

  1. 通过短按K1键来切换待机和工作模式 短按K2 K3键对设定目标温度 同时长按K2 K3键切换不同模式
  2. 待机中时 只测量烙铁温度 不进行加热 可以当温度计用
  3. 工作中时 测量烙铁温度 并把烙铁温度加热恒温至设定目标温度
  4. 设定目标温度范围: -99℃~450℃
  5. 烙铁温度测量范围:-200℃~450℃ 受温度校准参数影响范围和精度
  6. 当没有检测到任何运动时 开始进行进入深度睡眠模式的休眠时间计时 检测到运动重置计时
  7. 当检测到锂电池电压低于3.2V时将进入深度睡眠模式

功能设置模式

  1. 短按K1键切换不同的功能设置 长按K1键进入和退出更详细的参数设置界面 短按K2 K3键对 功能进行1开或0关 参数加或减
  2. 最大电流设置: 设置不同供电电压下的最大加热电流 以防止电流过大拉跨电源
  3. 工作模式设置: 默认标准加热模式 智能加热模式检测到大焊点会自动+50℃ 进行焊接 目前不太完善
  4. 运动检测设置: 设置加速度检测阈值
  5. 休眠时间设置: 设置1~60分钟的休眠计时 超过时间进入深度睡眠模式
  6. 屏幕方向设置: 通过短按K2 K3键进对屏幕方向进行设置
  7. 辅助照明设置: 设置LED辅助照明开关
  8. 蜂鸣开关设置: 设置蜂鸣器提示音是否开关
  9. 恢复默认设置: 参数置1 恢复所有参数的默认值并保存

校准设置模式

  1. 短按K1键切换不同的校准参数 长按K1键进入和退出更详细的参数设置界面 短按K2 K2进对参数进行减或加 开或关设置
  2. 通过外部精准的温度计测量烙铁的真实温度来调整设定温度值让烙铁恒温到要校准的温度值然后按下校准开关来保存对应的烙铁热电偶电压
  3. 校准电压时默认从0℃ 开始校准 把烙铁头放入冰水混合物中 一会后校准 然后逐级校准 500℃可能会超量程
  4. 温度校准最好用专业的温度计 万用表的那种不靠谱 0℃以下校准参数 没条件校准 写的是理论计算值
  5. 默认的校准参数是用万用表校准的 不太准 不同厂家的烙铁热电偶电压大概率不同使用前需要校准一遍
  6. 为了支持-100℃ ~ 450℃温度范围测量 0~ 450℃测量精度有所牺牲

软件说明

  1. 此程序基于Arduino IDE开发 源程序和依赖库及 编译好的烧录文件在附件内 小白建议用ESP官方工具烧录
  2. 通过ESP官方工具烧录下载烧录 需要安装esp32 flash_download_tool_3.9.5 调入烧录bin文件 配置对应参数下载重启即可
  3. 通过Arduino IDE编译下载烧录 需要安装esp32 开发板和相关库 及选择对应的芯片参数配置 安装包版本:esp32_package_2.0.14
  4. 芯片初次下载程序时 没有USB设备就换一面插头 如果USB不会识别 需要要拉低P0引脚(按下K3键) 然后按下复位按键进入强制下载模式
  5. 强制下载模式烧录成功后需要按下复位按键重启运行程序 屏幕不显示按下按键看有无反应 有反应屏幕不亮进入深度睡眠模式后唤醒试试
  6. 如果烧录成功后出现 没反应 屏幕不显示黑屏 等现象 重点检查硬件焊接和下载参数配置 如果出现异常状况 可重新烧录程序试试

硬件装配

  1. EESP32-C245无线烙铁由: 主控PCBA + 转接板PCBA + 锂电池 + 外壳 + C245烙铁芯 组成
  2. 主控PCB和转接板PCB 使用普通RF-4材质 2层板 板厚0.8mm 两块板子通过排针焊接在一起 注意方向别焊反
  3. 转接板PCBA需要焊上3种铍青铜冠簧 O4.5-8mm / K10#-8 / K16#-6 各一个 详细信息看图 注意通风铍青铜焊接有毒
  4. 外壳使用SOLIDWORKS 2021 设计 有两套相似的方案组成 分大外壳和小外壳 能通用 只是外形有一点区别 任选一套使用即可
  5. 锂电池推荐使用 富力782768SV航模电芯 容量1750mAh 长68宽27高7.2mm 详细信息看图 只要参数合适其它型号也能用
  6. TFT使用 ST7735 0.96寸 160*80 像素彩色液晶显示屏 焊接式13PIN接口 注意必须用ST7735的 ST7735S可能不显示
  7. C245烙铁芯使用的是速工的 C245-SK小刀头烙铁芯

注意事项

  1. 此项目为 CC BY-SA 4.0 开源项目 如需大批量商用必需找原作者进行授权
  2. 此项目大量使用0402封装元件 手焊难度较大 或者使用嘉立创SMT 项目难度较高复刻量力而行
  3. 航模电芯焊接时建议把电压放电至3.3V再焊接 正负极千万不要焊反 否则会释放魔法烟雾
  4. 3D打印外壳 大壳尽量选用打印精度高的材料 靠近发热端的小壳 尽量选用耐高温的材料
  5. 初次使用可能有些参数不正常 建议进行恢复默认设置操作一下
  6. 软件控制PWM驱动恒流功能异常会导致电流过高拉垮电源 尽量选用大功率的电源来避免这个问题
  7. 进行高温大焊盘焊接时 锂电池供电的最大20W加热功率可能不够用 建议使用大功率电源供电
  8. 元件参数以原理图为准 立创商城没有的上淘宝 相关软硬件资料都在附件内 原理图有备注相关信息
  9. 该项目仅为个人DIY项目 没经过专业的评估和测试 可能有隐藏BUG 还不是很完善 谨慎复刻和使用 风险自行承担

实物展示

输入图片说明 输入图片说明

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ESP32-C245无线烙铁是一款便携自带锂电池供电的无线式电烙铁 使用C245发热芯 支持TYPE-C 快充直接供电和给锂电池充电 支持烙铁温度 电流 电压 功率 等参数的实时测量和显示 展开 收起
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https://gitee.com/arduino2021/ESP32-C245.git
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ESP32-C245
ESP32-C245无线烙铁
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