RFID EM 18 Reader Module Serial

Description:

The EM-18 is a low-cost, widely used Radio Frequency Identification (RFID) reader module. It's designed to read unique identification codes from RFID tags operating at 125kHz. It's a read-only module, meaning it can only read tag IDs, not write to them. The EM-18 outputs the read tag data serially, usually in a format that can be easily interfaced with microcontrollers or other digital systems.   

Key Features:

• Low-Cost: One of the most affordable RFID reader options available.   
• 125kHz Operation: Works with common 125kHz RFID tags.   
• Read-Only: Reads the unique ID of RFID tags.   
• Serial Output: Outputs the tag data serially, making it easy to connect to microcontrollers. The serial output is typically TTL level.   
• Compact Size: Small and easy to integrate into projects.   
• Simple to Use: Relatively straightforward to interface and use.

Applications:

The EM-18 finds application in a variety of RFID-based systems:   

• Access Control: Used in simple access control systems where users present an RFID card or tag to gain entry.   
• Attendance Tracking: Tracking attendance at events, schools, or workplaces.   
• Inventory Management: Basic inventory tracking by tagging items with RFID tags.
• Animal Identification: Identifying and tracking animals with RFID implants or tags.   
• DIY Projects: Popular for hobbyist projects involving RFID.
• Simple Authentication: Basic authentication of users or items.   

Specifications (Typical - Always check the datasheet):

• Operating Frequency: 125kHz 
• Reading Range: A few centimeters (typically up to 10cm, but this can vary depending on the tag and antenna).  
• Output Interface: Serial (TTL level, usually RS-232 format or similar)  
• Data Format: The output data format can vary slightly but often consists of the tag ID as a string of characters. Check the datasheet for the exact format.
• Power Supply: Typically 5V DC

DATA SHEET AND USECASE

Key Features and Specifications:

• Operating Voltage: 4.5V to 5.5V DC
• Current Consumption: <50 mA
• Operating Frequency: 125 kHz
• Reading Distance: Up to 10 cm (depending on tag type)
• Output Format: TTL serial output at 9600 bps
• Antenna: Integrated on-chip
• Dimensions: 32 mm x 32 mm x 8 mm