Joe Desbonnet

RCWL-0516 microwave radar 790

Everything I could find about a cheap Doppler-radar motion sensor module, an alternative to a PIR sensor. The carrier turned out to be about 3.18 GHz, found with a HackRF.

repo discussion

Efergy energy-monitor decoder

Decoding the radio frames sent by Efergy electricity monitors, using a cheap RTL-SDR dongle.

rtl-sdr-efergy efergy-e2

Camera gimbal protocols

Reverse-engineered radio protocols and control code for the DJI RS3 (Bluetooth LE) and Zifon PT5000 (nRF24L01-style 2.4 GHz) camera gimbals.

dji_rs3_control RS3 web app zifon_pt5000

GNSS / RTK positioning 33

Software, scripts and data for real-time and post-processed kinematic satellite navigation, a low-cost RTK survey kit and a Java GNSS library.

GNSS_RTK RTK_survey java_gnss survey video

GPS Selective Availability switch-off

GPS receiver data and a visualisation of the moment Selective Availability was switched off on 2 May 2000, when civilian accuracy improved about tenfold.

repo

ECG front ends

Code and PCBs for TI ADS1x9x ECG front-end chips, including an LPC824 + ADS1292R board and LPC1114 firmware.

ADS1x9xECG LPC824_ADS1292R LPC1114 firmware

PPG, SpO₂ and blood pressure

Tools for analysing photoplethysmogram signals, MAX30102 SpO₂ sensor firmware, and an add-on that turns a low-cost blood pressure monitor into an ambulatory one.

PPG_Tools MAX30102 LPC824_BP

AS7265x 18-channel spectrometer 12

C library and utility for the AMS AS7265x spectral sensor (410–940 nm), experiment data, and work with the Hamamatsu C12880MA micro-spectrometer.

as7265x experiments C12880MA

Thermal & time-of-flight cameras

Convert raw radiometric FLIR E4/E8 images into temperatures without proprietary software, plus tools for the Terabee 3Dcam 80×60 time-of-flight camera.

flir_tools terabee_3dcam_tools

Radiative heat balance

A physics simulator that explores how surfaces heat up when exposed to the sun or other radiative sources.

simulator repo

Fourier (DFT) learning tools

Browser-based tools for learning the discrete Fourier transform and convolution, with interactive plots.

DFT tool convolution

Audio → waterfall plot 8

A script that renders an audio file, such as an MP3, into a video of a scrolling spectrum waterfall.

repo video

Acoustic pulse reflection 13

Experiments with the k-Wave acoustics toolbox and Octave, simulating how an acoustic pulse spreads and reflects.

repo video

WS2812B LED matrices

WS2812B RGB LED drivers for the LPC824, and an experimental 30×16 LED matrix that became a Christmas decoration.

LPC824_WS2812B WS2812B_matrix hohoho

LPC8xx firmware & PCBs

Bare-chip ARM Cortex-M0+ projects: a sous-vide controller, RFM69/LoRa radio boards, flash-as-EEPROM, and breakout PCBs.

sous vide RFMxx board flash EEPROM TSSOP20 breakout

JBDiff binary diff 40

A Java translation of Colin Percival's bsdiff binary diff and patch utility.

repo

History and harbour

Online editions of James Hardiman's History of Galway (1820) and William Wilde's Lough Corrib (1872), plus a harbour webcam with a tide gauge and sun, moon and Venus overlay.

Hardiman Lough Corrib webcam video