[pizza]

Software-defined radios - you can do absolutely insane things with these. Listen to multiple radio stations as once, listen to ham radio, capture live images of the earth from geostationary satellites, watch live airplane traffic, listen to maritime radio, ...try to listen to signals using the moon as a reflector.., detect GPS jammers..., sync 5 of them to the same clock source and use them as a passive radar array to track objects' movements through walls..... use them for backyard radio astronomy to detect the ion trails due to the hydrogen emission line of blazing meteorites.... this shit is cheap too the most common basic model is like only 20 bucks.

Haskell

Jax / Awkward Array

Topological Data Analysis

Cocalc

CLIP

gitpod / vscodeweb / github codespaces

CodeQL

DDSP

mathlib

neovim

language-server-protocol

adafruit feather m0

rr

linear logic

tmux

[relbeek2]

I’ve been looking to get into SDRs. Do you have any recommendations on what to buy?

[mikewarot]

The cheap RTL2832 software dongles do a surprisingly good job, and can be had with antennas for $30-40. There are many different packages which can drive them, including SDRsharp and HDSDR.

--

GNU Radio lets you build flowcharts, and compiles them (via python) into real-time data flows. I've built all sorts of things in it, including one that tells me the direction to a VOR aircraft navigation beacon near me.

It also does audio frequencies, so can work with your speaker and microphone.

It's not the slickest package around, but it gets the job done, and it's open source.

[pizza]

I only have an rtl-sdr, it can only receive but is good enough for what I need. Also heard good things about hackRF (can tx as well as rx).

rtl-sdr.com has a buying guide: https://www.rtl-sdr.com/