Ward calling system is a tool that patient's request to call a doctor or nurse on duty for diagnosis, care of emergency.It is used to assist hospital patients to call a doctor or nurse on hospital beds easily. The request of the patient can be quickly transmitted to doctors or nurses on duty.It is one of the necessary equipment to improve the standard of care hospitals and wards.This system composed of S51 MCU,four buttons,four digital tubes,four lights,four buzzers.There are four beds in every ward of hospital. When patient press the button,at the same time the corresponding buzzer rang,the corresponding digital tube shows the number of bed,the corresponding light shine.
Keywords: Ward calling system,S51 MCU