JT308 125KHz USB Proximity Sensor RFID Reader Module
JT308 125KHz USB Proximity Sensor RFID ID Card Reader Module
The 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.
Key Specifications
| Specification | Value |
|---|---|
| Operating Frequency | 125KHz |
| Protocol | EM4100 (125kHz) |
| Interface | USB 1.1/2.0 |
| Output Format | 10 decimal digits + enter (keyboard) |
| Read Range | Up to 5 cm (depends on tag) |
| Supply Voltage | 5V DC via USB |
What You Can Build With This
- DIY access control system
- Attendance logger with Raspberry Pi
- Inventory tracking of tagged items
- Interactive exhibition with tag triggers
Compatibility
Works 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.
Wiring Notes
No 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).
Why Buy from Compoden
Every 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.
Is this compatible with Raspberry Pi?
Yes, it works as a keyboard input device when connected via USB. You can read tag data using any program that accepts keyboard input.
Can it read 13.56MHz NFC cards?
No, this reader operates at 125kHz and is designed for EM4100 protocol only. For NFC, consider a PN532 module.
What tags work with this reader?
It works with standard 125kHz EM4100 frequency RFID tags and key fobs commonly used for access control. We also sell compatible tags separately.
📦 Free Setup Handoff Document Included
Every 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.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items