Real Time Face Detection and Tracking Robot using Arduino
Have you ever wanted to develop a robot while tracking your face by just using an Arduino and without having to learn programming languages such as OpenCV, Visual Basic and C#? If you're…

Know the mission before touching a wire.
Understand what you are making, prepare the right tools, and make the workbench safe.
Project details
Real Time Face Detection and Tracking Robot using Arduino is a arduino project. Have you ever wanted to develop a robot while tracking your face by just using an Arduino and without having to learn programming languages such as OpenCV, Visual Basic and C#? If you're…
- Source pages
- 850-854
- Named parts
- 7
- Build goal
- Working, tested prototype
Tools you need
- Digital multimeter
- Wire stripper and side cutters
- Soldering iron with a fine tip
- Current-limited bench supply
- Computer with a data-capable USB cable
Use eye protection, good lighting, and a clean insulated surface throughout the build.
Safety precautions
- Disconnect every power source before changing a connection.
- Check component polarity, pinout, and supply voltage twice.
- Use a current limit for the first power-up.
- Keep liquids, loose metal, and uninsulated wires away from the bench.
Gather, identify, and understand every part.
Use the standardized inventory, then open What's this? to learn each part's role, advantages, limitations, handling, and specifications.
What's this?Image, role, pros, cons, handling & specifications
MODULE LEARNING VIEWArduino Nano
A programmable controller that reads inputs, makes decisions, and drives the project's outputs.
What it does hereIt is the control centre and must use the documented board, pin map, supply, and logic level.
Buy / compare this part ↗Advantages
- Reprogrammable and reusable
- Large learning ecosystem
- Complex behaviour remains changeable
Limitations
- GPIO voltage and current are limited
- Some pins affect boot or communication
- Loads normally need a driver
Handling
- Disconnect power before rewiring
- Avoid static discharge
- Never power motors, relays, or pumps directly from GPIO
Specifications to verify
- Use the exact model, value, package, and rating listed for Arduino Nano; similar-looking parts are not always interchangeable.
- Confirm operating voltage, logic level, pinout, memory, USB interface, and maximum GPIO current.
What's this?Image, role, pros, cons, handling & specifications

Servo motor SG90 – 2Nos
An output component turns an electrical control signal into light, sound, motion, switching, or displayed information.
What it does hereIt presents the circuit result or acts on the physical world.
Buy / compare this part ↗Advantages
- Makes system state visible
- Can be tested separately
- Supports clear troubleshooting
Limitations
- Loads may exceed controller current
- Polarity or driver direction can matter
- Inductive loads create voltage spikes
Handling
- Use the documented driver stage
- Check polarity and load current
- Add flyback protection for inductive loads
Specifications to verify
- Use the exact model, value, package, and rating listed for Servo motor SG90 – 2Nos; similar-looking parts are not always interchangeable.
- Confirm voltage, current, polarity, interface, driver requirements, and duty cycle.
What's this?Image, role, pros, cons, handling & specifications

Android Phone with decent camera
A named project component whose exact role is defined by the source circuit and build guide.
What it does hereIt performs a documented electrical, control, interface, or construction function in this project.
Buy / compare this part ↗Advantages
- Selected for this project
- Can be checked independently
- Supports modular troubleshooting
Limitations
- Substitutes may differ
- Generic names can hide variants
- Pinouts and ratings vary
Handling
- Compare the received part with the source
- Keep it labelled
- Do not force connectors or adjusters
Specifications to verify
- Use the exact model, value, package, and rating listed for Android Phone with decent camera; similar-looking parts are not always interchangeable.
- Confirm dimensions, ratings, connection method, polarity, and environmental limits.
What's this?Image, role, pros, cons, handling & specifications

HC-05/HC-06 Bluetooth Module
A named project component whose exact role is defined by the source circuit and build guide.
What it does hereIt performs a documented electrical, control, interface, or construction function in this project.
Buy / compare this part ↗Advantages
- Selected for this project
- Can be checked independently
- Supports modular troubleshooting
Limitations
- Substitutes may differ
- Generic names can hide variants
- Pinouts and ratings vary
Handling
- Compare the received part with the source
- Keep it labelled
- Do not force connectors or adjusters
Specifications to verify
- Use the exact model, value, package, and rating listed for HC-05/HC-06 Bluetooth Module; similar-looking parts are not always interchangeable.
- Confirm dimensions, ratings, connection method, polarity, and environmental limits.
What's this?Image, role, pros, cons, handling & specifications

Computer for programming
A named project component whose exact role is defined by the source circuit and build guide.
What it does hereIt performs a documented electrical, control, interface, or construction function in this project.
Buy / compare this part ↗Advantages
- Selected for this project
- Can be checked independently
- Supports modular troubleshooting
Limitations
- Substitutes may differ
- Generic names can hide variants
- Pinouts and ratings vary
Handling
- Compare the received part with the source
- Keep it labelled
- Do not force connectors or adjusters
Specifications to verify
- Use the exact model, value, package, and rating listed for Computer for programming; similar-looking parts are not always interchangeable.
- Confirm dimensions, ratings, connection method, polarity, and environmental limits.
What's this?Image, role, pros, cons, handling & specifications

D printer (optional)
A named project component whose exact role is defined by the source circuit and build guide.
What it does hereIt performs a documented electrical, control, interface, or construction function in this project.
Buy / compare this part ↗Advantages
- Selected for this project
- Can be checked independently
- Supports modular troubleshooting
Limitations
- Substitutes may differ
- Generic names can hide variants
- Pinouts and ratings vary
Handling
- Compare the received part with the source
- Keep it labelled
- Do not force connectors or adjusters
Specifications to verify
- Use the exact model, value, package, and rating listed for D printer (optional); similar-looking parts are not always interchangeable.
- Confirm dimensions, ratings, connection method, polarity, and environmental limits.
What's this?Image, role, pros, cons, handling & specifications

V Battery
A power component supplies, converts, stores, or regulates energy for the project.
What it does hereIt must provide the documented voltage, polarity, isolation, and sufficient current safely.
Buy / compare this part ↗Advantages
- Stable power improves reliability
- Current limiting protects first tests
- Regulation reduces resets and noise
Limitations
- Wrong polarity can cause immediate damage
- Underrated parts overheat
- Mains circuits require qualified supervision
Handling
- Measure output before connection
- Use a fuse or current limit
- Insulate exposed conductors
Specifications to verify
- Use the exact model, value, package, and rating listed for V Battery; similar-looking parts are not always interchangeable.
- Confirm input/output voltage, current, polarity, connector, isolation, and thermal rating.
Connect one verified path at a time.
Explore the named components and standardized signal flow, then use Source Check to verify exact physical pins, values, and topology before applying power.
Trace this circuit.
Real Time Face Detection and Tracking Robot using Arduino: interactive parts, standardized terminals, responsive anchored wires, student explanations, and the original circuit reference in one shared system.
Trace before wiring
Follow power, ground, inputs, processing, and outputs in that order. Never guess a pin from package shape alone.
Connect with power off
Make short, labelled connections and share a common ground only where the schematic requires it.
Inspect every joint
Check continuity, polarity, adjacent shorts, and loose connections before the first power-up.
Open all source diagrams and build views 3 visuals



Confirm the hardware-only control path.
This project does not include firmware in the source. The circuit itself provides the required behaviour.
How to connect
- Match every controller label to the circuit view and source pin map.
- Join grounds before signal wires when separate low-voltage supplies are used.
- Keep motors, relays, pumps, and other loads on a suitable driver and external supply.
Common mistakes
Reversed VCC/GND, board-label versus GPIO-number confusion, missing common ground, and charge-only USB cables.
Troubleshoot
Disconnect loads, continuity-test one path at a time, then test with a current limit.
Software preparation
No IDE, board package, library, or firmware upload is required for this project.
If you add a programmable controller as an extension, document its pin map separately.
How to upload code
The original design is implemented entirely in hardware, so proceed after verifying the circuit and supply.
Assemble, deploy, test, and troubleshoot.
Use the complete source notes in build order, then pass the final checks before calling the project finished.
Build in functional stages
- Power and regulation
- Controller or processing stage
- Inputs and sensors
- Outputs and loads
- Enclosure and strain relief
Power up safely
- Inspect unpowered continuity first
- Apply the lowest safe current limit
- Measure supply rails before signals
- Add one load at a time
- Record expected and actual results
Work from simple to complex
- Confirm power, ground, polarity, and orientation
- Compare each pin with the source
- Test inputs separately from outputs
- Replace only one variable at a time
- Power off before every correction
Follow the documented instructions.
These notes come from this project's source and remain in their original order.
Project overview
Project build noteHave you ever wanted to develop a robot while tracking your face by just using an Arduino and without having to learn programming languages such as OpenCV, Visual Basic and C#? If you're interested in learning more about how we can implement face detection with Arduino and Android, read on. In this project, you'll move the mobile camera with the help of servos to follow you around. Using an Android Mobile Phone offers the advantage of not having to invest in a camera module, and all of the image detection is done on the phone itself, so you do not need an Arduino-based computer for this. Our Bluetooth Module communicates wirelessly with mobile devices using the Arduino Uno.
Processing Android was used to create the Android application used in this project. You can either download the APK file (see below for details) or install the application directly from the Processing Android website. Alternatively, you may use the Processing Code provided in the Tutorial to create a more interesting Android Application. Our previous Processing projects will give you more information about Processing. After following this, you will be able to build a Mini Tilt and Span Robotic Arm with the capability of tracking and moving along with your face. This (with further advancement) can be used to record vlog videos or even take selfies using the front and rear cameras on your mobile phones. The exact centre of the screen is positioned exactly where your face is. Therefore! How
does that sound? The Demo Video at the end of this article shows how it works. Let's figure out how to do it... This project has been designed to be as simple as possible, anyone with a basic understanding of hardware or programming can use these guidelines to make it work in no time. However, once you make it, I suggest you dig deep into the code so you can get a real understanding of how it works.
Materials Required
Project build noteArduino Nano Servo motor SG90 – 2Nos Android Phone with decent camera HC-05/HC-06 Bluetooth Module Computer for programming 3D printer (optional) 9V Battery Two servo motors are used in the circuit, one for moving the mobile phone left and right, and another for tilting it up and down. As a result, the Arduino Nano will instruct the servo to move in the direction requested by the
Bluetooth module (HC-05). All of the circuit components are powered by a 9V battery.
Setting up your Android Application
Project build noteEarlier I mentioned that this Android application is the brain behind the project. Processing Android was used to develop this android application. The steps below will show you how to download and launch the application directly on your smartphone. Download the APK file from here http://bit.ly/face_tracking_download (Server 1) or https://drive.google.com/file/d/1SrPrcxjs8jOFUDYYw_FaHrk01cteqD8n/vi ew?usp=sharing (Server 2) Circuits such as those shown above should be powered on. Look for the Bluetooth module named "HC-05" in your phone's settings The name should always be " HC-05 ", as only then the application will work if you haven't named it anything else. Use the password " 1234 " or " 0000 " to pair with your Bluetooth module. The application will now launch in portrait mode. Across the top of the screen, you will see your camera screen and "Connected to: HC- 05 ". The top left corner of your screen will also display the pixel's position when you move your camera over a face.
By adding some additional advancements for which you won't have to code your own Android application, you can take this Arduino Face Tracking Project to the next level. You might think that creating an Android application is a complicated thing, but trust me, it's very easy with processing. With your own creativity, you can make any advancement you want.
Working
Project build noteThen, once our hardware, code, and Android application are ready, we can start the building process. Simply power your Arduino and open the android application. The HC-05 Bluetooth module (must be called HC-05) will automatically connect to the application when it detects a face. In order to use our mobile holder, simply place the phone in the holder and sit back. As your phone's servo motors move, you should notice your face cantered on the display. Your mobile phone will now follow your movements when you move within the camera's range.
You built Real Time Face Detection and Tracking Robot using Arduino.
You followed the full workflow from understanding the mission to testing the finished project. That is a real engineering achievement - well done.
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