Design and Realization of Practical Timer Based on AT89C2051

The timer has been widely used in industrial and home appliance control.The practical timer whose core is the AT89C2051 single chip is introduced.The use of AT89C2051 and LED digital tube is characterized by its low power consumption,small volume and low price.Besides,it is continuously adjustable and easy to make.The hardware circuits and main program diagrams of the timer are presented,and the key techniques in design of hardware and software are also described.The timer is in the use trial stable performance,ckmpact design,low ckst and high practicality.