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Drone Autopilot

Consumer electronics Drone Embedded hardware development Firmware development Robotics

Today, you can buy drones in all kinds of shapes and sizes. The market offers ready-to-use drones with GPS, autopilot, and camera. However, when commercial drones weren't in great demand, there were lots of amateurs who constructed their drones from scratch.

One e-commerce store was selling components for do-it-yourself unmanned aircraft. Because there were many competing stores of the same kind on the market, it was hard to offer a competitive advantage. The owner of this particular store decided to build a ready-to-market product whose target audience would be people without skills in aeromodelling.

PCB based on Atmel AVR XMEGA microcontroller with everything needed for the autopilot system.


Integra Sources was hired to develop an autopilot system that could enable a drone to fly autonomously and could be used with any type of drones, from quadcopters to fixed-wing systems.


We designed a circuit board based on the Atmel AVR XMEGA microcontroller, which was much smaller than the other analogs in existence at that time. Despite its size, we managed to pack in everything you need for an autopilot system including a gyroscope, accelerometer, pressure sensor, GPS, and a barometer. 

The device we designed runs ported and customized ArduPilot firmware written in C/C++ (AVR Studio IDE). The firmware works with a native host PC application called MissionPlanner. It's a great tool for setting up drones and planning flight missions.

PCBA of the drone autopilot prototype
Drone autopilot prototype board

Scope of work

  • Schematics design
  • PCB design
  • Generation files for the manufacturer
  • Ordering the components and PCB manufacturing
  • Prototyping assembly
  • Hardware testing
  • Debugging
  • Firmware development

Technologies Used

  • ATXmega series MCU with AVR core was used for this project.
  • Altium Designer IDE was used for Schematics and PCB design.
  • The firmware was implemented using C/C++.
  • AVR Studio IDE was used for firmware implementation.
  • For precision positioning GPS, accelerometer, gyroscope, barometer, and DCM (Direction cosine matrix) based algorithms are used.
  • The device has 6 RC inputs for remote control equipment like RC radio receivers, and 6 RC outputs to control motor controllers, servos, etc.
  • The device has several buttons, switches, and LEDs.


The device we delivered is an autopilot system for a drone that controls all peripherals, actuators, and motors. It enables remote control and autonomous completion of flights. It is a great choice for people who prefer to buy ready-to-use quadcopters rather than building DIY drones from scratch.

Device appearance

The circuit board for the Drone Autopilot has a three-axis accelerometer, a three-axis gyroscope, a pressure sensor, and GPS on board. It has up to six radio control inputs to receive control from the radio control receiver and up to six radio control outputs to control motors and/or servos. The board has four external serial interfaces to connect extra modules.