Build It
Do-it-yourself science and technology projects: physics experiments, electronics, home lab, software and sensors.
Track Aircraft With an RTL-SDR Dongle and ADS-B at 1090 MHz
How ADS-B works on 1090 MHz, how to size a vertical antenna, and how to go from an RTL-SDR dongle to a…
How to Set Up Pi-hole for Network-Wide DNS Ad Blocking
A step-by-step Pi-hole setup guide: how DNS sinkholing works, the install, pointing your router at it, a test, what can go wrong,…
Build a Local RAG Notes Search With Ollama and Python
A step-by-step guide to a local question-answering tool over your own notes: chunking, embeddings with Ollama, vector search, and the ways retrieval-augmented…
Debug I2C and SPI With a Low-Cost Logic Analyzer and PulseView
A step-by-step guide to capturing I2C and SPI with an inexpensive USB logic analyzer and sigrok PulseView: signal basics, sampling-rate rules, decoder…
Build a Diffusion Cloud Chamber and Watch Cosmic-Ray Tracks
A parts list, build steps and safety notes for a dry-ice diffusion cloud chamber, plus a guide to telling muon, electron and…