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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.

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.

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...

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...

picoCAD 2 is a 3D modelling tool that lets you make low poly models with a unique aesthetic, A fun, easy, and accessible 3D modeller focusing on the bare essentials.

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.