This repository contains processing code for a software defined radio based passive radar. Passive radars don't transmit any signals of their own - instead, they locate targets by detecting the echoes of ambient radio signals that bounce off of them. Uses FM radio broadcasts as the illuminating signal. This is not realtime - it analyzes stored PR information and displays it, and it's not quick. It does tell you how to collect your own radar data, however, as well as which SDRs are feasible.

Software that decodes the following digital transmission modes: POCSAG512, POCSAG1200, POCSAG2400, FLEX, EAS, UFSK1200, CLIPFSK, AFSK1200, AFSK2400, AFSK2400_2, AFSK2400_3, HAPN4800, FSK9600, DTMF, ZVEI1, ZVEI2, ZVEI3, DZVEI, PZVEI, EEA, EIA, CCIR, Morse code (CW), X10.

Give it a recording or stream of raw audio and it can try to make sense of it. This includes the output of utilities like rtl_fm.

Software and documentation for getting media signals (FM RF) out of VHS VCRs, processing them, and writing them out to lossless digital formats for archival.

A collection of the best free and open source hamradio projects!

Charles Grassin

I am a young systems engineer in Paris, recently graduated in embedded systems. Electronics and code being my passions, I enjoy working on innovative open-source/hardware projects.

Dual language site - english and french.

Using an RTL-SDR device to do spectrum analysis. Uses numpy, pyQtGraph, rtlsdr modules. Short, sweet, and to the point.

A pure Python implementation of Fast Fourier Transformations (FFT) for Circuit Python. Ideal for use with the PyBadge, but should work with any Circuit Python-enabled platform. Requires an analog signal input of some kind.

F/OSS software for developing brain/computer interfaces. Compatible with a fair number of commercial EEG devices. Runs on Windows as well as Linux.