HI-R-W26-W2 (HID RFID reader with wiegand 26 interface)

For this project,I am using HI-R-W26-W2 (HID RFID reader with wiegand 26 interface) to read the data from RFID tag. This reader is a contactless smart card reader. It is read-only card serial number or customize read-only data. This reader communicates with the controller through the Wiegand, ABA, RS232 or RS485 interface, and it is special design for access control, time attendance and other applications. This reader adopts powerful eight microprocessor, advance watch-dog and voltage monitoring circuit design. Set high security and economical efficiency, not only has the characteristics of high integration, strong anti-jamming capability but also small size and more stable performance. 

Support card 
EM4100, em4102, tk4100 etc 

Frequency 
125KHz 

Baud Rate 
9600/19200(RS232/RS485) 

Power Supply 
DC 9V ~ 12V(± 5%) 

Current 
<60mA 

Operating Range 
30-100mm(depending on card/tag) 

Interface 
RS232/RS485/Wiegand26/Wiegand34/ABA 

Indication Light A
1 LED, 1BUZ 

Working Temperature 
-10º C to +70º C 

Storage Temperature 
-20º C to +80º C 

Humidity 
0~95% 

Size 
80*42*11mm

PCB Layout For Transmitter and Receiver

Receiver

              

Transmitter

Transmitter With PIC

Receiver With PIC

RFID TAG

The RFID tag involved in this project is passive tag. Passive tags are used in this project because it can be much smaller and cheaper than active. So it is ideal for this system and can operate effectively. Another advantage is their longer shelf life, where as an active tag batteries may last only a few years, a passive tag could in principle be read many decades after the chip was manufactured. Mifare 4k MF1ICS70 model of tag is choosing as it very cheap and it have internal memory about4 kbyte besides this tag already used by most university. At this moment, internal memory inside the tag is not used yet.

Problem Statement

•             Current exam monitoring method require lot of manpower and time.
•              No digital method that can evaluate the presence or absence of the candidates during the examination.
•              Method used not practical(collecting attendance slip).
•          Current exam monitoring system require student to raise their hand to get help from invigilator,they might not notice  the student.

BLOCK DIAGRAM