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Bertrand Selva

Passionate about embedded systems and multidisciplinary projects combining physics, signal processing, and software development

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115 Following
6 Projects
38 Likes
bertrand-selva
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This user joined on 04/19/2025.

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Encrypted off-grid LoRa messaging terminal with GPS sync and dynamic key destruction. No network, no trace, full control.
Project Owner Contributor

Pi PICO LoRa text messenger

bertrand-selvaBertrand Selva

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How to spy on your neighbor (scientifically)? Acoustic parabola + NLMS on ESP32.
Project Owner Contributor

Acoustic Parabola with NLMS Adaptive Filtering on

bertrand-selvaBertrand Selva

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A low-cost MEMS gyrocompass measures Earth s rotation to determine true north and latitude, independent of magnetic fields.
Project Owner Contributor

No More Compass: True North via Earth s Rotation

bertrand-selvaBertrand Selva

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This project presents a compact system capable of determining the direction and elevation of a sound source in real-time with Pi PICO
Project Owner Contributor

Acoustic Targeting Module for Tactical Drone

bertrand-selvaBertrand Selva

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for Solar and Subsurface Monitoring
Project Owner Contributor

High-Precision MEMS Magnetometer

bertrand-selvaBertrand Selva

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DIY off-grid terminal using Arduino Mega, TCM3105 modem, GPS, and error correction for resilient text communication.
Project Owner Contributor

Fallout-Style Communication Terminal: AFSK Modem

bertrand-selvaBertrand Selva

Things I've Built

MEMS-Based Gyrocompass

Gyroscopes mounted on a rotating platform and measurement fusion with a Kalman filter. No magnetic field needed — it finds north just by measuring the Earth’s spin! https://www.youtube.com/watch?v=U-fFy3L0FEQ

3D Sound Direction Detection System

A device that estimates the direction and elevation of a sound source using four microphones. It processes audio signals via FFT-based cross-correlation to determine time differences of arrival https://www.youtube.com/watch?v=_IeDw05at84

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Make the invisible visible for about $500.
Project Owner Contributor

Open Ground Penetrating Radar

glenn-powersGlenn Powers

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A versatile autonomous environmental drone using a buoyancy engine
Project Owner Contributor

OSUG: Open-Source Underwater Glider

alexwalexw

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Full-on Spotify scrolling and streaming via a Raspberry Pi Zero W and the original iPod clickwheel. Bluetooth, WiFi, and haptic feedback!!
Project Owner Contributor

sPot: Spotify in a 4th-gen iPod (2004)

guy-dupontGuy Dupont

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Follow for the 'Hacklet' and latest news about hackaday.io
Project Owner Contributor

Hackaday.io Project

lutetiumLutetium

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Get the most out of your (heltec/ttgo/aliexpress) ESP32 LoRa OLED development board
Project Owner Contributor

ESP32 - LoRa - OLED Module

datadata

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Launch monitor using low-cost Raspberry pi and camera hardware to determine ball launch speed, angles and spin
Project Owner Contributor

PiTrac - The DIY Golf Launch Monitor

james-pilgrimJames Pilgrim

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A small Z80 computer with composite video, serial and a hard drive with CP/M
Project Owner Contributor

Z80 Microcomputer System

256byteram256byteram

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Loko is the 12 gram GPS tracker with extreme battery life.
Project Owner Contributor

Loko-Offline GPS tracker with 270 days battery

akio-satoAkio Sato

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Leveraging the Programmable Power Supply (PPS) of USB PD 3.0 and 3.1 to make an ultra-compact bench power supply
Project Owner Contributor

PocketPD - USB-C Portable Bench Power Supply

centylabCentyLab

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The G-EDM is an electrical discharge machine that supports sinker EDM, EDM engraving, EDM drilling and Wire EDM operations. #Drahterodieren
Project Owner Contributor

G-EDM

gedm-devgedm-dev

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A solar-powered, Raspberry Pi-like Board idea that runs on 5mW
Project Owner Contributor

The FemtoTX Motherboard Standard

giovanniGiovanni

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Goal of the project is to develop and build a homebrew 16 bit relay computer
Project Owner Contributor

Homebrew 16 bit relay computer

peterPeter

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An RS232C serial terminal using MC6802 & LED dot matrix display modules
Project Owner Contributor

6802 Serial Terminal

mitsuru-yamadaMitsuru Yamada

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Open Source, Child-Focused Leg Exoskeleton for accessibility in developing communities.
Project Owner Contributor

Alice Open Source Exoskeleton 2021 Update

jess-tamez-duqueJesús Tamez-Duque

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An Open source Braille embosser in the spirit of RepRap
Project Owner Contributor

BrailleRAP DIY Braille embosser

stephaneStephane

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MeshWalkie: A handheld Compact Wireless Multi-Tool for Lora and Hackers.
Project Owner Contributor

MeshWalkie

openembedOpenEmbed

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Add mapping and MQTT-interfacing with ESP8266 and an IMU
Project Owner Contributor

Old Roomba, new tricks

simon-jansenSimon Jansen

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A Birdhouse with Internet
Project Owner Contributor

LoRaWAN Birdhouse

jan-schlieperJan Schlieper

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Mitsuru Yamada wrote 05/09/2025 at 05:02 • point

Thank you for liking and following my #6802 Serial Terminal! The terminal had been underutilized recently, but with this project, it is now in constant operation.

  Are you sure? yes | no

Mitsuru Yamada wrote 05/03/2025 at 23:44 • point

Thank you for liking and following my #Equatorial Mount using Rotarystage, 6502 Computer! I have reorganized my own computer systems of previous projects into this computer system.

  Are you sure? yes | no

Mitsuru Yamada wrote 04/30/2025 at 05:18 • point

Thank you for following me! Recently, I have been doing new improvement for mechanical systems related to the telescope mount controller project.

  Are you sure? yes | no

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