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Dual-Barometer System

A compact PCB designed to provide wide-range pressure measurement, redundant sensing and onboard calibration for embedded systems where reliability, accuracy and easy integration are key.

Status KiCad
REXUS/BEXUS Program


Overview

The main goal of this PCB is to improve the reliability and accuracy of pressure measurement in embedded sensing systems.

It is especially useful in applications where pressure conditions may vary significantly during operation and where a single commercial sensor may not provide enough range, resolution or calibration stability.

The board is designed to support:

  • Wide-range pressure measurement.
  • Redundant pressure sensing.
  • Altitude estimation.
  • Sensor cross-validation.
  • Onboard calibration storage.
  • Easy integration with a main controller.

Main Features

  • Dual-barometer architecture.
  • TE MS5803-01BA high-resolution pressure sensor.
  • Amphenol NPA-730B low-pressure backup sensor.
  • Shared I2C communication bus.
  • Onboard Microchip 24LC02B EEPROM.
  • Storage of board-specific calibration coefficients.
  • Plug-and-play calibration approach.
  • Compact PCB for embedded sensing applications.
  • Custom KiCad symbols, footprints and 3D models.

Contributing

· Code of Conduct · Contributing Guide ·

We welcome collaboration from the aerospace and software community. For major changes or data inquiries, please open an issue first.

License

Copyright © 2025-2026 The BLESS Project Team

This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at http://mozilla.org/MPL/2.0/.

Credits & Team

Supported by the REXUS/BEXUS Program and our generous sponsors.

About

Open-source dual-barometer PCB with redundant pressure measurement and onboard EEPROM calibration.

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