Arduino Bluetooth Controlled Robot

I’ll show you how to build a simple Bluetooth-controlled robot car using the L293D motor driver, the HC-05 Bluetooth module, and an Arduino UNO. This DIY project is beginner-friendly, low-cost, and a great starting point if you’re just getting into Arduino robotics and wireless control!

Introduction

How to Make a Bluetooth Controlled Robot Using Arduino + HC-05 + L293D

In this tutorial, I’ll show you how to build a simple Bluetooth-controlled robot car using the L293D motor driver, the HC-05 Bluetooth module, and an Arduino UNO. This DIY project is beginner-friendly, low-cost, and a great starting point if you’re just getting into Arduino robotics and wireless control!

Project Overview:

With just a few basic components, you’ll be able to control your robot car wirelessly using any Bluetooth-enabled smartphone and a simple controller app. Once powered and paired, your bot will respond to forward, reverse, left, and right commands in real-time!

Things I Used

Image	Product	Quantity	Buy
	Arduino	1
	HiLetgo L293D DC Motor Drive Shield Stepper Motor Drive Shield Expansion Board for Arduino Duemilanove Raspberry Pi	1
	2 Pack HC-05 Bluetooth 2.0 Dual-Mode Module - Compatible with ARDUINO	1
	6 Pack I865ORechargeable Battery with Charger 2 Slot, Universal Charger for 3.7V Rechargeable Batteries 18500 18650 (Button Top Type),No Suitable for NiMH and Other 1.5V Batteries	1
	ELEGOO 120pcs Multicolored Dupont Wire 40pin Male to Female, 40pin Male to Male, 40pin Female to Female Breadboard Jumper Ribbon Cables Kit Compatible with Arduino Projects	1
	4PCS TT Motor Wheel 65mm Rubber Tire Wheel for RC Car Smart Car Robot Wheels Replacement Part (Style 1)	1
	4 Sets TT Motor with Leads, DC 3-6V Gearbox Motor Dual Shaft 200RPM Ratio 1:48 Motor with Tire Wheel Kit for Arduino DIY Smart Car Robot	1
	4 Packs Flat Top IMREN 3500mAh 30A 18650 Rechargeable Battery for Flashlights	1

How To Build

📦 Components You’ll Need:

🟢 Arduino UNO – Compact microcontroller to run the robot’s logic
🟢 L293D Motor Driver – Drives the two DC motors with directional control
🟢 HC-05 Bluetooth Module – Enables wireless communication with your phone
🟢 TT Gear Motors (x2) – Provide the movement
🟢 65mm Wheels (x2) – Snap onto the TT motors
🟢 18650 Battery & Holder – Powers everything
🟢 Jumper Wires – For circuit connections
🟢 Soldering Iron & Glue Gun – Optional tools for permanent assembly

🛒 Recommended Buying Links:

Amazon.in:

Arduino UNO
L293D Motor Driver
TT Gear Motor
HC-05 Bluetooth Module
18650 Battery & Holder
Jumper Wires
65MM Wheels
Soldering Iron
Glue Gun

Banggood:

Arduino UNO R3
TT Gear Motor
HC-05 Bluetooth Module
L293D & L298N Motor Drivers
Wheels, Batteries, Battery Holder
Switch & Jumper Cables

📱 Pairing and Controlling:

Upload the code to your Arduino UNO.
Pair your HC-05 with your smartphone using a Bluetooth terminal or a custom car controller app.
Open the app, connect, and control your bot with directional buttons.
Watch it roll!

📥 Arduino Code & Circuit Diagram:

Available on the project page. Click the download button below the video description on this page to get the code and schematic.

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