RFID Proximity Based Checking, Detecting Expiry Date & Stock Updating is electronics based final year project based on RFID technology. Different RFID tags or cards are assigned to different products or items. By using these cards, we can easily detect the available stock of any particular item. When some amount of item gets added into the stock, the updated stock is detected by the RFID tags. In the hardware part, there is a power supply unit, an ATMEGA 16 microcontroller, a LCD, one RFID reader module, one alarm or buzzer used to implement it.