“Experience the Arduino All-in-One Robot, equipped with Bluetooth, IR remote, voice control, obstacle avoidance, and hand follower.
Meet my Arduino All-in-One Robot: a super cool creation with Bluetooth, voice, and remote control. It avoids obstacles, follows your hand, and shines with colorful lights. Let’s dive into its story—a mix of tech, fun, and endless ideas.
Features:
- Bluetooth Control: Seamlessly control the robot using a custom-made mobile app created with MIT App Inventor. Enjoy the convenience of wireless control from your smartphone.
- Voice Control: Command your robot with ease using voice commands. Interact with your creation effortlessly and explore a new dimension of control.
- IR Remote Control: Utilize an infrared remote to navigate the robot through various modes and functionalities. Experience intuitive control at your fingertips.
- Obstacle Avoidance Mode: Equipped with ultrasonic sensors, the robot autonomously navigates its environment, avoiding obstacles in its path to ensure smooth operation.
- Hand Follower Mode: Activate this mode and watch as the robot follows your hand movements, demonstrating advanced tracking capabilities and interactive behaviour.
- Front and Back RGB LEDs: Illuminate your surroundings with vibrant RGB lights mounted on the front and back of the robot. Customize the colors and patterns for a personalized touch.
- Obstacle Detection Using Ultrasonic Sensor: Enhance safety and navigation with real-time obstacle detection. The robot intelligently detects obstacles while moving forward, automatically stopping if an obstacle is detected within 20 cm.
- Speed Control: Adjust the robot’s speed to suit your preferences and optimize performance for different tasks and terrains.
- Gesture Control Using Ultrasonic Sensor and IR Sensor: Interact with the robot using hand gestures detected by ultrasonic and IR sensors. Experience a hands-free control experience like never before.
Building Your Own Arduino All-in-One Robot: Step-by-Step Guide
Step 1: Requirements
- Arduino nano
- Arduino nano shield (in my case I made it on zero PCB)
- Bo motor with bo wheels x 4
- Sg90 servo motor
- L298n motor driver module
- Ultrasonic sensor
- HC-05 Bluetooth module
- Infrared proximity sensor x 2
- Infrared receiver IR tsop 1738
- RGB LEDs common anode x 4
- 100 ohms resistor for leds x 12
- 18650 lithium-ion battery 3.7 volt 2000 mah
- 18650 2-cell lithium-ion battery holder
- On and off switch
- Zero PCB
- Male and female header pins
- Chassis (I am using a DIY cardboard sheet chassis)
Step 2: Arduino nano shield
To connect all the signal input and output pins to Arduino Nano, I made a shield that costs less than buying a readymade shield. In addition, I added a 5-volt regulator circuit using a 7805 voltage regulator to power up the Arduino Nano and other 5-volt components such as sensors, LEDs, etc. The input voltage in my case is 7.4 volts or 8.4 volts at full charge, which comes from two 3.7 volt lithium-ion batteries connected in series to give 7.4 volts. To ensure efficient and stable 5-volt output, I recommend using a buck converter such as LM2596.
Step 3: RGB LEDs
To easily mount RGB LEDs on a chassis, I created a circuit using a zero PCB. I used common anode RGB LEDs, with each red, green, and blue leg connected in series with a 100 ohm resistor. Then, I connected two RGB LED circuits in parallel - one for the front panel and another for the back panel. This means that the red-to-red, green-to-green, and blue-to-blue pins are connected, and the anode is common in all the RGB LED circuits, directly connected to 5 volts. I repeated this process to create another circuit.
Step 4: Mount the RGB LEDs on the chassis
To enhance the visual appeal of your chassis, it is recommended that you create precise and neat holes in the front and back panels for the purpose of attaching RGB LEDs. This will give your project an impressive and eye-catching appearance. The LEDs will emit vibrant colors that will illuminate your project and make it stand out from the rest. Follow the instructions carefully to ensure that the LEDs are perfectly aligned and secured. Once completed, you will have an aesthetically pleasing and professional-looking chassis that will impress anyone who sees it.
Step 5: Mount IR sensor, motor driver and Arduino shield
I have created an IR sensor module, but you can also use a pre-made one. To facilitate hand following and gesture control for your robot, mount the IR sensor on the left and right side of the front chassis, as shown in the picture below.
Mount the L298n motor driver using nuts and bolts.
Step 6: Make PCB for Bluetooth and IR receiver
Make a PCB for a Bluetooth and IR receiver to mount on top of the chassis. Extend the wires of signal and power pins to connect it to Arduino.
Step 7: Mount the servo motor on the top of the chassis
Mount the SG90 servo motor on the top of the chassis using screws. Make holes for mounting the 18650 battery holder, Bluetooth, and IR receiver PCB.
Step 8: Make all the connections
Please refer to the circuit diagram provided below and make all the necessary connections accordingly.
Step 9: Application
The application controlling the Arduino all-in-one robot was developed using MIT App Inventor. This bespoke mobile app enables smooth wireless robot control from a smartphone. Including functions such as voice control, obstacle avoidance, and hand tracking, the app provides a user-friendly and engaging control interface. Users can adjust the robot’s speed and change the front and back RGB LED colors with seven different options.
Step 10: Coding
The code for this robot is provided below. You can download it and upload it to your Arduino board.”