Abstract: An animal feeder includes at least one fodder bin, a fodder mixing device, a control module, a radio frequency identification (RFID) system and an audio frequency device. The fodder bin is provided for storing and outputting fodder. The fodder mixing device is provided for controlling the output of fodder in the fodder bin. The control module is provided for controlling the operation of the animal feeder. The radio frequency identification (RFID) system includes at least one electronic tag and at least one reader. The electronic tag is tagged onto animals. The reader is installed at the control module. The audio frequency device is provided for inputting and outputting an audio frequency. The aforementioned elements constitute an animal feeder that can provide fodders to a specific animal, issue a calling audio frequency, and controlling a fixed quantity of different fodders outputted at a fixed time.

Abstract: An animal feeder includes at least one fodder bin, a fodder mixing device, a control module, a radio frequency identification (RFID) system and an audio frequency device. The fodder bin is provided for storing and outputting fodder. The fodder mixing device is provided for controlling the output of fodder in the fodder bin. The control module is provided for controlling the operation of the animal feeder. The radio frequency identification (RFID) system includes at least one electronic tag and at least one reader. The electronic tag is tagged onto animals. The reader is installed at the control module. The audio frequency device is provided for inputting and outputting an audio frequency. The aforementioned elements constitute an animal feeder that can provide fodders to a specific animal, issue a calling audio frequency, and controlling a fixed quantity of different fodders outputted at a fixed time.

Abstract: An optical disc with an identification tag is provided. The identification tag is an Radio Frequency Identification (RFID) tag provided on the outer rim of the optical disc for storing identification information related to the optical disc, thereby when a plurality of optical discs are packed in a stack, identification information stored in the RFID tags at the outer rims of the optical discs can be easily read.