@ic_china: 🎯 5块钱的人体检测传感器，你见过吗？ A $1 motion sensor — have you seen it before? 🎩 戴着“白帽子”的小模块 A small module with a “white dome” 👀 能检测到移动的人或动物 It can detect moving people or animals 🦶 长着三只脚 It has three pins ⚡ 两侧接正负电源 Two pins connect to power 📡 中间是信号输出 The middle pin outputs the signal 🔌 接上一个继电器模块 Connect it to a relay module 💡 就成了人体感应开关 And it becomes a motion-activated switch 🚶 人来自动开灯 Lights turn on when someone arrives 🚶‍♂️ 人走灯自动熄灭 Lights turn off when people leave 📷 如果再加一个摄像头模块 Add a camera module 📸 还能实现人来自动拍照 It can automatically take photos when motion is detected 🛠 几块钱的小模块 Just a few dollars of modules 🚀 就能做出有趣的小项目 You can build interesting projects 🤓 喜欢电子DIY的老铁 If you enjoy electronics DIY 📩 欢迎加入一起玩 Welcome to join and build together WhatsApp 👉 https://wa.me/85252099651 #电子DIY #人体传感器 #ESP32 #IoT #智能家居

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