We are final year systems engineering students working on RFID system to identify students entering/leaving a lecture room to relieve the course instructor of manually taking attendance and thus concentrate more on passing knowledge knowledge in class. we would like to have the Block dig & circuit diagram of Reader,available Tags & preferred antenna The device is an RF ID unit. The specs are as follows. the unit must perform the following functionalists:
1.read\\write RF ID tags. 2.display information about the holder of the card (matriculation no,name,date,time of entry,) 3.frequency range of tag should be 125 KHz 4.there must be connection of RS232 5.capable of storing and displaying 500 student names 6.there must be LED circuit showing whether the card is valid,whether the device is ready to accept the card 7.power considerations & considerations . 9.there must be an option of adding new coding to the controller to be used. 10.extension of memory should be possible. 11 we need an entire circuit that contains an appropriate microcontroller with all interfaces in built.awaiting ur most favourable response.
...Taofeeq