PERANCANGAN ROBOT PENDETEKSI LOGAM BERBASIS ANDROID DENGAN KOMUNIKASI BLUETOOTH

Abstract

This research aims to make a metal detector robot using android based smartphone as controller. The robot is able to distinguish the detected metal type and to locate the metal by giving its location coordinate point displayed on Google Maps. The design of robot consists of microcontroller, Hall Effect sensor, HC-05 bluetooth module, GPS (Global Positioning System) module, DC motor, motor driver, and smartphone. Data from metal type obtained from metal sensor and the location coordinate point from GPS is displayed on smartphone via Bluetooth communication. The robot is able to distinguish types of metal by the difference of ADC value (Analog Digital Converter) of detected metal. Iron's ADC value range is from 490 until 499 and zinc's is greater than 500. The error rate in defining type of pure metal made from iron is 30% and from zinc is 10%. The error rate in defining type of alloy made from iron is 35% and from zinc is 20%.