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Earlier this year, Ashu and Ava from JLCPCB reached out to offer some free prototyping for my projects. I was delighted and jumped at the opportunity.

A XIAO / QT Py compatible expansion with JR-style servo headers and bidirectional 3.3 v to 5 v level shifters on all 11 GPIO pins.

My Oops! All Servos! expansion boards for XIAO / QT Py microcontrollers, with servo headers and level shifters, are now available for purchase. Development sponsored by JLCPCB.

For CircuitPython Day 2026, I wanted to get close to the metal and write a module in C that I could call from CircuitPython. Finally, we bundle everything inside a class.

For CircuitPython Day 2026, I wanted to get close to the metal and write a module in C that I could call from CircuitPython. This time, we're looking at adding a module-level method.

For CircuitPython Day 2026, I wanted to get close to the metal and write a module in C that I could call from CircuitPython. This time, we're looking at the build process and adding an enum.

A managed switch with 2.5G and 10G networking for less than £40 showed up in my recommendations. Time for a cheap teardown, and who knows, maybe more.

Do the level-shifters work in both directions? Can you measure the current draw? How far can you push the Oops! All Servos!, microcontroller and servos? Development sponsored by JLCPCB.

I've finally caved; against my better judgement, I've added a dark colour scheme to my blog. In 2026, with modern CSS, this is easier than you might imagine.

Even though these boards were sponsored by JLCPCB, I still wanted to save some money, so I opted to handle the through-hole components myself. I also deliberately ordered a few unpopulated PCBs to use...

I'm proud to announce Oops! All Servos!, an expansion board for XIAO/QT Py compatible microcontrollers, breaking out all 11 GPIO pins into servo motor headers, the development of which has been sponso...

The full New Year Honours lists for 2014, recognising the achievements and service of extraordinary people across the United Kingdom.

Last week I published a new web toy, a Peter de Jong attractor visualiser. Written in plain JavaScript and rendering to a canvas, it comes with a small amount of interactivity to alter the co-efficien...

How to build quick and dirty network services, the Unixy, way with the venerable inetd approach.

How to build quick and dirty network services, the Unixy, way with the venerable inetd approach.

Job Title: 1009-314/1009-318 Senior Software Developer x2 | Grade: D | Hours: 35 (full-time) | Vacancy type: x2 Permanent | Location: NatureScot offices, home or hybrid | Closing date: Midnight 1st Ma...

I've been exchanging emails, discussing debugging protocols like I2C with my Spy! Break! Inject! and I thought that writing this up as a blog post might be useful to others.

In early December, Emily from PCBWay sent me a short message saying they were preparing some small gifts in time for Christmas and asking if I was interested in receiving them?

In this third and final installment in the series, I'll demonstrate how to retrieve trusted certificates for your internal infrastructure, automatically performing DNS-01 challenges from within OpenWr...

Open Source Hardware Association

Introducing momtag, or Mike's Opinionated Music Tagger. Keep a small collection of music reasonably and consistently organised.

In part two of this series, I'll show you how to retrieve trusted certificates for your private Caddy server, via Mythic Beasts.