Aplikasi Ultrasonik Hcsr-04 sebagai Penghitung Jumlah Orang Masuk ke dalam Gedung Gereja Berbasis Mikrokontroller Atmega328p

Abstract

To make it easier for human to do the calculation process of person entering in a building then used sensor as automatic calculator, and currently used sensor HCSR-04 by using microcontroller based Atmega328P. This tool can be used to measure object distance from 2cm - 4m with 3mm accuracy . This tool has 4 pins, Vcc pin, Gnd, Trigger, and Echo. Pin Vcc for positive power and Gnd for ground it. Pin Trigger to trigger the discharge signal from the sensor and Echo pin to capture the reflected signal from the object. Keywords: sensor HCSR-04, ATMEGA328P