摘要：In scientific writing will be discussed concerning the design TIMER & CLOCKWITH DIGITAL DISPLAY USING AT89S51, which is designed to display thetimer and clock (timepiece). Single-chip microcontroller is a computer that hasthe ability to be programmed and used for control-oriented tasks. Control roomto make minimal microcontroller is more effective than the computer PC,because the microcontroller has the same architecture with a portable PC. With4-port 8-bit as an input / output. From the results of experiments performed, theappliance timer and clock with digital display using AT89S51 can work asexpected when the button is pressed, the timer switch 2 will start chopping, andwhen the reset switch and two keys pressed at the same time, the mode will runwell designed with seven segment there are four pieces that will display theoutputs of the timer or clock.
