Build Your Own Drone from Scratch with ESP32

# Build Your Own Drone from Scratch with ESP32: The Open-Source Project "Flix"

Have you ever dreamed of building your own drone from scratch? Not just assembling a pre-made kit, but selecting the chips, designing the circuits, 3D printing the frame, soldering the components, flashing the firmware, and tuning the parameters until it takes off right from your hands? This is the ultimate romance for tech enthusiasts!

While it might sound intimidating, requiring a huge budget or reading thick technical manuals, the **Flix** project changes everything. It lowers the barrier to entry, making drone-building accessible to anyone.

## What is Flix?

Flix is a fully open-source quadcopter project based on the ESP32 chip, created by a Russian developer. Everything—firmware code, circuit diagrams, and 3D models—is freely available on GitHub.

Its core philosophy is simplicity. Unlike commercial drones that use closed-source protocols and "black box" chips, Flix uses highly readable, concise firmware written in Arduino.

## How to Build It? (Step-by-Step)

### Step 1: Gather the Components
Flix uses standard, off-the-shelf electronic components that are incredibly affordable. Here is the parts list:

- **Brain:** ESP32 Mini Development Board (Cheap, powerful, and includes Wi-Fi)
- **Balance:** GY-91 / MPU-9250 / MPU-6050 IMU (Tells the drone its orientation)
- **Heart (Motors):** 4x 8520 3.7V Brushed Coreless Motors
- **Wings (Propellers):** 4x 55mm or 65mm Propellers (Ensure correct CW/CCW placement)
- **Muscles:** 4x MOSFETs (e.g., 100N03A) to control motor speed
- **Energy:** 3.7V LiPo Battery & Charger
- **Skeleton:** 3D Printed Frame (STL files provided; print yourself or order online)
- **Misc:** Resistors, wires, screws, double-sided tape.

### Step 2: Build and Assemble
1. **Print the Frame:** Download the STL files and 3D print the drone's skeleton.
2. **Soldering:** Follow the circuit diagram to solder the ESP32, IMU, MOSFETs, and motor connectors.
3. **Assembly:** Mount all electronics and motors onto the frame and attach the propellers.

### Step 3: Flash the Firmware
Connect the ESP32 to your computer and flash the Flix firmware using the Arduino IDE. Once done, you can control the drone via Wi-Fi using a computer, gamepad, or smartphone.

## Simulation and Learning

The creator also provided a Gazebo-based simulation environment. You can test and tune parameters (like PID) virtually before real-world flights. With less than 2000 lines of code, Flix serves as an excellent educational tool to understand attitude calculation, motor mixing, and remote control parsing.

## Conclusion

Flix proves that the joy of creation doesn't require a high budget. It's a key to unlocking the secrets of flight control and experiencing the journey from code to reality. 

*Safety First:* Always fly in open, unpopulated areas!