1. The Kit

This kit is available from our eBay store.

It comes with the following parts:

2 x Geared motors + 2 x Tyres/wheels + 2 x Motor fixings
4 x motor cables.

1 x transparent acrylic glass plate

1 x L293D motor shield

1 x Arduino UNO328 controller board (CH340 usb driver)

1 x HC-06 Bluetooth module

1 x Battery holder (12V , 8 x AA / batteries not included)

2 x motor speed encoding disks (Use with IR optocoupler sensors which are not included)

1 x USB cable for arduino

1x Castor wheel + 4 x Copper pillar + Screws kit

1x on/off toggle mini switch, extra screws and nuts, tie cables etc

2. Connect the motors

Connect the motors and wheels as shown in the figure 1. Solder the red and black wires as shown. These correspond to the positive and negative of the motors/battery terminals. If you connect the red and black to the +ve and -ve of the battery , all the motors/ wheels should spin in the same direction. If any wheel spins in a different direction swap the wires on the motor terminals to correct the spin.

Figure 1: Connecting wheels and motors

2. Connect Bluetooth Hc-06 to arduino

Solder wires to arduino uno according to the following connection table.

HC-06	Arduino
VCC	3.3v
GND	GND
TXD	RXD
RXD	TXD

Figure 2

Figure 3:

3. Connect the motor shield

and tie to chassis as shown below

Figure 4

4. Connect motor cables and power to Arduino shield

connect both motors to the shied as shown in figure below. The terminal are marked as M3 and M4 on the shield. Also connect the battery terminals to power the board.

Figure 5

5. Arduino code:

Before uploading the code to arduino uno, always disconnect the power to HC-06.

To control the motors, i used the library <AFMotor.h>.

#include <AFMotor.h> //creates two objects to control the terminal 3 and 4 of motor shield AF_DCMotor motor1(3); AF_DCMotor motor2(4); char command; void setup() { Serial.begin(9600); //Set the baud rate to your Bluetooth module. } void loop(){ if(Serial.available() > 0){ command = Serial.read(); Stop(); //initialize with motors stoped //Change pin mode only if new command is different from previous. Serial.println(command); switch(command){ case 'F': forward(); break; case 'B': back(); break; case 'L': left(); break; case 'R': right(); break; } } } void forward() { motor1.setSpeed(255); motor1.run(BACKWARD); motor2.setSpeed(255); motor2.run(BACKWARD); } void back() { motor1.setSpeed(255); motor1.run(FORWARD); motor2.setSpeed(255); motor2.run(FORWARD); } void left() { motor1.setSpeed(255); motor1.run(BACKWARD); motor2.setSpeed(0); motor2.run(RELEASE); } void right() { motor1.setSpeed(0); motor1.run(RELEASE); motor2.setSpeed(255); motor2.run(BACKWARD); } void Stop() { motor1.setSpeed(0); motor2.run(RELEASE); motor2.setSpeed(0); motor2.run(RELEASE); }