This kit is available from our eBay store.
It comes with the following parts:
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:
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); }
6. Android App
The link to Download the app from google play store is:
A screen shot of the app is shown in Fig 6. The app has both accelerometer and button control functionality.
Figure 6: Bluetooth RC Controller
