Interactive-Demo
AI
Giving Claude Code a Logic Analyser: A Minimal Bench Harness for Zephyr on the nRF52840
An AI coding agent can write, build and flash firmware, but it cannot see the LED. This article builds a small Claude Code harness for Zephyr on the nRF52840 DK that closes the loop with real measurements from an Analog Discovery, and shows what it caught that reading the code never would.
Derek Molloy
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Oct 26, 2026
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45 min read
Arduino
A Radar Scope on the Arduino UNO Q: Multi-Target Tracking with the Ai-Thinker RD-03D mmWave Sensor
UNO Q with a 24 GHz radar wired to the board to build a live radar scope - the MCU turns a binary sensor stream into three tracked targets, and the Linux side draws them sweeping across a web dashboard. Along the way, a proper look at how FMCW radar works, all showing the strength of mmWave radar.
Derek Molloy
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Aug 10, 2026
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73 min read
Zephyr
The Zephyr Devicetree: An Interactive Demo
A gentle, but complete introduction to the Zephyr devicetree, taught through the one thing every beginner gets wrong - which way round an LED is wired. Built from nothing on a low-cost Seeed XIAO nRF52840, with three onboard LEDs, one external LED wired deliberately backwards, and a button.
Derek Molloy
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Aug 07, 2026
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69 min read
Embedded
How Charlieplexing works: an interactive demo
Eleven pins, 104 LEDs, and a scan you can slow down until the trick falls apart. An interactive walkthrough of the Arduino UNO Q's charlieplexed matrix, built from the board's own devicetree.
Derek Molloy
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Jul 29, 2026
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28 min read