Automated Milk Quantity and Quality Checking and Vending Machine

In this paper, each farmer is provided with a separate RFID tag, which has a unique code. When the RFID tag is punched against RFID card reader LCDs the code. Milk is deposited in the tank where its quality and quantity is determined. The quality of milk is examined using a pH sensor and its quantity is determined using an ultrasonic sensor. The milk is segregated into third categories depending on its quality as first quality, second quality, and rejection. Here three solenoid valves are used for segregation purposes. The milk is deposited in separate tanks according to its quality. The details such as cost, quality, and quantity of milk are fed to PC. The customer deposits the currency note. The web camera is used to capture the image of the currency note and it is compared with the database stored in PC. Here a switch is used for quality selection based on customer preference. Milk is vended based on the rupee note deposited and on the quality selected by the customer. The entire system is maintained with a refrigeration temperature of 4°C.