"智能定时喂养系统设计：基于单片机的宠物喂食器电路设计"

Based on the single-chip microcomputer, the circuit design of the pet feeder is studied in this thesis. Specifically, the pet automatic feeder is designed to automatically feed pets at five preset feeding times. The system emits a feeding signal to attract the pet to eat when the set time is reached. This design focuses on how to set the five feeding times and emit the feeding signal. The pet feeder system mainly consists of single-chip microcontroller control, automatic switch and buzzer prompting, and countdown time setting system. During the feeding process, the user can set five countdown times with a keyboard. When these five times are reached, the LED lights up, the buzzer sounds, attracting the pet to come and eat, and automatically dispensing food. This design solves the problem of not being able to feed pets when the owner is working or on holiday, avoiding issues caused by irregular diet in pets. Single-chip microcontroller is utilized to control various systems in the entire system. The countdown system time is displayed on a six-digit seven-segment LED display. The microcontroller continuously reads the set time and determines whether it is time for feeding. The switch system uses resistors and LEDs to indicate the status, with the LED turning on when receiving a low level signal to indicate the switch is open for feeding. Additionally, a buzzer is connected, and it sounds when it is time for feeding to attract the pet. Keywords: Intelligence; Timed feeding; Single-chip microcontroller AT89S52; Circuit design of pet feeder based on single-chip microcontroller.