{"product_id":"jt308-125khz-usb-rfid-card-reader-module-proximity-sensor","title":"JT308 125KHz USB RFID Card Reader Module – Proximity Sensor","description":"\u003ch1\u003eJT308 125KHz USB Proximity Sensor Smart RFID ID Card Reader Module – Reads EM4100 Tags\u003c\/h1\u003e\n\n\u003cp\u003eThe JT308 is a USB plug-and-play RFID reader module designed for 125KHz proximity cards and key fobs. It reads standard EM4100 compatible tags and outputs the ID as keystrokes, making it ideal for access control, attendance logging, and DIY security projects. No drivers are needed; simply connect it to a computer or microcontroller USB host port and it works immediately.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Frequency\u003c\/td\u003e\n\u003ctd\u003e125KHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eUSB (HID Keyboard Emulation)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRead Range\u003c\/td\u003e\n\u003ctd\u003eUp to 5 cm (depending on tag)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupported Tag Types\u003c\/td\u003e\n\u003ctd\u003eEM4100, EM4200, compatible 125KHz tags\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC (via USB)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Format\u003c\/td\u003e\n\u003ctd\u003e10-digit decimal or 8-digit hex (configurable)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-arduino-rfid-door-lock\"\u003eRFID door lock system using Arduino or Raspberry Pi\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eEmployee attendance tracker with Python and a database\u003c\/li\u003e\n  \u003cli\u003eInventory management by tagging items with EM4100 stickers\u003c\/li\u003e\n  \u003cli\u003eDIY access control for lab equipment or tool cabinets\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis reader works with any USB host, including Windows, Linux, Mac, Raspberry Pi, and Android devices with OTG support. For microcontroller projects, use a USB host shield (e.g., for Arduino Uno) or a board with native USB host like Arduino Due or Raspberry Pi Pico. It operates at 5V and draws power directly from the USB bus.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eThe module has a standard USB-A connector; just plug it into a free USB port. If integrating into an embedded project without USB host, you'll need a USB host controller module. Avoid connecting it directly to UART pins; it communicates as an HID keyboard.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Raspberry Pi?\u003c\/summary\u003e\u003cp\u003eYes, plug it into any Raspberry Pi USB port; it will act as a keyboard and send the tag ID as keystrokes into your script or terminal.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it read 13.56 MHz NFC tags?\u003c\/summary\u003e\u003cp\u003eNo, this reader only works with 125KHz EM4100 protocol tags. For NFC, you would need a 13.56MHz module such as PN532.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it need an external power supply?\u003c\/summary\u003e\u003cp\u003eNo, it draws power from the USB port (5V, around 30mA) and requires no additional power source.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444999086445,"sku":"CDN-0614","price":430.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_45c9fc0e-2ada-411c-a910-eb70fe652cca.jpg?v=1781512729","url":"https:\/\/compoden.com\/products\/jt308-125khz-usb-rfid-card-reader-module-proximity-sensor","provider":"Compoden","version":"1.0","type":"link"}