{"product_id":"jt308-125khz-usb-proximity-sensor-rfid-reader-module","title":"JT308 125KHz USB Proximity Sensor RFID Reader Module","description":"\u003ch1\u003eJT308 125KHz USB Proximity Sensor RFID ID Card Reader Module\u003c\/h1\u003e\n\n\u003cp\u003eThe JT308 is a 125KHz USB proximity sensor RFID reader module that decodes standard EM4100 protocol tags and outputs the ID as keyboard keystrokes over USB. It is used for building access control systems, attendance trackers, and interactive projects. No driver installation is required—just plug it into any USB host and it behaves like a keyboard.\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\u003eProtocol\u003c\/td\u003e\n\u003ctd\u003eEM4100 (125kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eUSB 1.1\/2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Format\u003c\/td\u003e\n\u003ctd\u003e10 decimal digits + enter (keyboard)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRead Range\u003c\/td\u003e\n\u003ctd\u003eUp to 5 cm (depends on tag)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC via USB\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\u003eDIY access control system\u003c\/li\u003e\n  \u003cli\u003eAttendance logger with Raspberry Pi\u003c\/li\u003e\n  \u003cli\u003eInventory tracking of tagged items\u003c\/li\u003e\n  \u003cli\u003eInteractive exhibition with tag triggers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with any USB host that supports keyboard input—Windows, Mac, Linux, Raspberry Pi, and microcontrollers with USB host shields (like Arduino USB Host Shield). It draws power from the USB port (5V) and outputs standard key strokes, so no libraries are needed.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eNo external wiring is needed; simply plug the module into a USB port. The device enumerates as a HID keyboard. Ensure the USB host supplies 5V and sufficient current (50mA typical).\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, it works as a keyboard input device when connected via USB. You can read tag data using any program that accepts keyboard input.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it read 13.56MHz NFC cards?\u003c\/summary\u003e\u003cp\u003eNo, this reader operates at 125kHz and is designed for EM4100 protocol only. For NFC, consider a PN532 module.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat tags work with this reader?\u003c\/summary\u003e\u003cp\u003eIt works with standard 125kHz EM4100 frequency RFID tags and key fobs commonly used for access control. We also sell compatible tags separately.\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":53444954063213,"sku":"CDN-0238","price":430.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_3da08354-7835-4d44-acd8-1a053f73d949.jpg?v=1781512330","url":"https:\/\/compoden.com\/products\/jt308-125khz-usb-proximity-sensor-rfid-reader-module","provider":"Compoden","version":"1.0","type":"link"}