Journal of Electrical and Electronics Engineering Vol. 1, No. 2, December 2016, Pages 56-61 Received: 10 April 2017 Revised: 30 May 2017 Accepted: 13 June 2017 A Remote Controlled Car Using Wireless Technology Joni Welman Simatupang and Michael Yosua Study Program of Electrical Engineering, Faculty of Engineering, President University Jl. Ki Hajar Dewantara, Cikarang Baru, Bekasi-17550, Indonesia Corresponding author: joniwsmtp@president.ac.id ABSTRACT Automation or automatic control is the use of various control system for operating any equipment or device such as a remote controlled (toy) car, switching on telephone networks, and other useful applications with minimal or reduced human interventions. This paper proposes a design and implementation of a remote controlled car by wi-fi technology via computer or mobile devices. In completing this research work, wireless software and hardware technologies have been used, such as wireless module of ESP8266 for transceiver (transmitter and receiver), Arduino Uno as microcontroller, an H-bridge L293D IC for motor controller, and two electric DC motors are used to move the automobile. Two objectives of this project are to expand the limitation range of a normal radio frequency car using wi-fi technology and also to create a ubiquitous technology for automobile that operates in daily life with a control system. The test result shows that the controlled car can move in any direction. However, the performance depends on the device signal strength where the maximum testing range is only about 20 meters’ distance from the user’s location. Keywords: automation, wi-fi technology, remote controlled car, Arduino, signal strength. ABSTRAK Otomatisasi atau kontrol otomatis adalah penggunaan berbagai sistem kontrol untuk mengoperasikan peralatan atau divais seperti mobil mainan yang dikontrol dengan remote, saklar jaringan-jaringan telepon, dan aplikasi bermanfaat lainnya yang sedikit atau bahkan tanpa intervensi manusia sama sekali. Artikel ini memberikan deskripsi tentang sebuah disain dan implementasi dari mobil mainan yang dikontrol dengan remote melalui medium teknologi nirkabel dengan menggunakan komputer atau ‘divais bergerak’ seperti telepon genggam. Dalam menyelesaikan penelitian ini, baik teknologi nirkabel perangkat lunak mapun perangkat keras telah digunakan, seperti halnya modul ESP8266 yang berfungsi sebagai pemancar dan penerima, Arduino Uno sebagai mikrokontroller, dan sebuah IC dengan tipe H-bridge L293D yang berfungsi untuk kontroller motor, dan dua motor DC elektrik yang digunakan untuk menggerakkan mobil remote kontrol tersebut. Dua tujuan utama dari penelitian ini adalah untuk memperbesar jangkauan batasan normal mobil frekuensi radio dengan menggunakan teknologi nirkabel dan juga untuk menciptakan teknologi kontrol yang memasyarakat dan dapat beroperasi dengan baik dalam kehidupan sehari-hari. Hasil dari tes percobaan menunjukkan bahwa mobil mainan yang dikontrol dapat bergerak ke segala arah. Namun, kinerjanya tergantung kepada kekuatan sinyal divais di mana jangkauan tes maksimum hanyalah 20 m jauhnya dari lokasi pengguna. Kata kunci: otomatisasi, teknologi nirkabel, mobil kontrol remote, Arduino, kekuatan sinyal. I. INTRODUCTION In 1898 in an exhibition at Madison Square Garden Nikola Tesla demonstrated a small boat which could apparently obey commands from the audience but was in fact controlled by Tesla interpreting the verbal requests and sending appropriate frequencies to tuned circuits in the boat [TKS06]. Then in 1966 the first commercial radio controlled cars, produced by the Italian company El-Gi (Electtronica Giocattoli) from Reggio Emilia. The first model was Ferrari 250LM and was released in UK [RCC15]. The principles of radio controlled car was very simple, the components needed are a transmitter, and a receiver, and a power supply. The transmitter has joysticks for controlling, steering and wheeling. The receiver uses amplitude modulation for the radio signal and pulse width modulation to control the motors. And the power supply supplies the power needed for the car to operate. Figure 1 shows the illustration of the basic wireless controlled car diagram. Currently, remote controlled cars use radio-frequency (RF) technology. In 2014, a group of students from Rutgers University that called the Spybot [EB14]. This project uses Bluetooth module, Arduino Motor Shield, 2 dc motors and 1 servo motor. It also uses two android phones, one for receiving the signal from Bluetooth module, and the other