RANCANG BANGUN ALAT UKUR JARAK BERBASIS MIKROKONTROLER AT89S51 DENGAN SENSOR ULTRASONIK

Abstract

Have done the research and design of distance measuring devices with ultrasonic sensors PING based microcontroller AT89S51. With the assembly programming language. Ultrasonic sensors utilizing the properties of sound waves with a frequency of 41 kHz beam. The working principle of the length of time for the sensor pulse (positive) high at P1.0 after doing trigger sensor. PING sensor using a pin as input and output. Distance measurements have been carried out by positioning the sensor with the object (such as water, wood and cotton). Units of measurement with a resolution centimeter is a centimeter. This tool can measure the distance between 3 cm to 3 m.