[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"project-80556":3},{"id":4,"name":5,"fullName":6,"owner":7,"repo":5,"description":8,"homepage":9,"htmlUrl":9,"language":10,"languages":9,"totalLinesOfCode":9,"stars":11,"forks":12,"watchers":13,"openIssues":14,"contributorsCount":15,"subscribersCount":15,"size":15,"stars1d":13,"stars7d":16,"stars30d":17,"stars90d":15,"forks30d":15,"starsTrendScore":16,"compositeScore":18,"rankGlobal":9,"rankLanguage":9,"license":19,"archived":20,"fork":20,"defaultBranch":21,"hasWiki":22,"hasPages":20,"topics":23,"createdAt":9,"pushedAt":9,"updatedAt":24,"readmeContent":25,"aiSummary":26,"trendingCount":15,"starSnapshotCount":15,"syncStatus":14,"lastSyncTime":27,"discoverSource":28},80556,"flipper-rfid-metal-detector","hnsvrdmn\u002Fflipper-rfid-metal-detector","hnsvrdmn","A Flipper Zero application that repurposes the 125kHz RFID antenna to act as a makeshift metal detector. ",null,"C",86,5,1,2,0,3,6,2.33,"MIT License",false,"main",true,[],"2026-06-12 02:04:03","# Flipper Zero RFID Metal Detector\n\nA Flipper Zero application that repurposes the 125kHz RFID antenna to act as a makeshift metal detector. \n\n## Features\n- **Visual & Audio Feedback**: Screen bar graph, increasing pitch, vibration, and LED alerts when metal is near.\n- **Adjustable Sensitivity**: Tune out environmental noise or adjust for specific uses (like scanning a human) with the Left\u002FRight buttons.\n- **Multiple Modes**: Toggle Sound\u002FVibro modes with the OK button.\n\n## Controls\n- **Left \u002F Right**: Adjust sensitivity (decrease \u002F increase).\n- **OK**: Cycle through alert modes (Sound+Vibro, Sound only, Vibro only, None).\n- **Up \u002F Down**: Open and close the Help screen.\n- **Back**: Exit the application.\n\n## How It Works\n\nInstead of reading RFID tags, the app repurposes the 125kHz antenna to act as a raw induction coil. By keeping the electromagnetic field active, the app continuously measures the duration (pulse width) of the signal's positive half-waves using timer captures. When metal enters the field, it creates eddy currents that draw energy from the coil, causing the antenna's voltage\u002Famplitude to drop. This drop alters the comparator's output, shortening the measured pulse width or causing it to drop out entirely. The code calculates the delta between a fixed baseline and a moving average of these real-time timing values to trigger the detection UI.\n\n## Limitations\n\nBecause this app uses the RFID hardware for an unintended purpose, its range and accuracy are limited. Expect a detection range of only a few cm at most. This tool is primarily educational and experimental, and it is not a replacement for a dedicated metal detector.\n\n## Installation\n\nThe easiest way to install is to download the pre-compiled `.fap` file from the Releases page and drop it directly onto your Flipper's SD card in the `apps\u002FTools\u002F` folder.\n\n### Build from Source\n1. Clone this repository into your Flipper firmware (`applications_user\u002Frfid_metal_detector`) or an empty directory for `ufbt`.\n2. Compile with `ufbt` or `.\u002Ffbt fap_rfid_metal_detector`.\n3. Transfer the compiled `.fap` to your Flipper's `apps\u002FTools\u002F` folder.\n\n## Credits & License\nCreated by AI (with Tommy's assistance).\nLicensed under the MIT License.\n","该项目是一款适用于Flipper Zero的应用程序，将125kHz RFID天线重新用作简易金属探测器。其核心功能包括可视化和音频反馈、可调节灵敏度以及多种报警模式，能够通过屏幕条形图、音调变化、振动和LED提示来检测附近是否有金属物体。用户可以通过左右键调整灵敏度，并使用OK键切换不同的报警模式。此应用通过持续测量信号正半周的脉冲宽度变化来判断金属的存在，但受限于RFID硬件的非预期用途，其检测范围和精度有限，通常只能在几厘米范围内有效。适合用于教育和实验场景，不适合替代专业的金属探测设备。","2026-06-11 04:01:13","CREATED_QUERY"]