Terence Eden. He has a beard and is smiling.

Terence Eden’s Blog

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Setting the time on the Tildagon

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Hexagonal circuit board with circular screen. It is showing the date and time.

I'm beginning my adventures in MicroPython in the hope that I'll have something interesting working on the Tildagon Badge for EMF2026. Here's a basic implementation of a clockface. Here's how to set the time on the badge. There's a hardware clock which should keep time between reboots. Install mpremote on your computer. Connect the Tildagon to your computer using a USB-C data cable On your…

Displaying a QR code in MicroPython on the Tildagon Badge

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A hexagonal circuit board with a circular screen. The screen displays a monochrome QR code.

This was a bit of a labour of love - and something I wanted to get running during EMF Camp. I'm documenting in the hope it'll be useful for EMF 2026! Here's the end result: Background I'm going to assume that you have updated your badge to the latest firmware version. You will also need to install mpremote on your development machine. You should also have successfully run the basic Hello,…

EMF 2024 - A Quick Retrospective

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Selfie of me in front of a Tesla Coil. A big metal tube shooting sparks.

Six years ago, I went to my first EMF Camp. The next event was cancelled by Covid. The one after that saw me come down with Covid - although I presented remotely. So I was beyond thrilled to be able to attend & speak this year. There's always a risk that you can never recapture the magic of your youth. But EMF is consistently brilliant. A delightful alternative reality of robots, lasers, art,…

Infrared Infrastructure

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Portacabin with hotspots.

I recently went to EMF Camp (which is Glastonbury for geeks - lots of random electronics, talks, art, and camping). Naturally, I took along my Infrared camera and pointed it at interesting things! First up… sewage! Festivals often have big tanks to take away human effluence. But how can you, a normal human, tell how full they are? Luckily, fresh sewage is warm. Phone boxen were plenty - t…

Chatting Solar Panels at EMF Camp

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A lot of very blurry faces overwhelmed by the light saturation.

I fucking loved my first visit to #EMFcamp. After two years of lockdown, I was over-excited at the chance to be with all my friends in a field this year. I was over-excited about doing a talk about my beloved solar panels. I was over-excited about sleeping in a goddamned camper-van! I was even - sadly - excited at seeing my name broadcast on TELETEXT! Photograph © Skylar MacDonald 2022. All …

Reflections on #EMFcamp - a Science-Fact Convention

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Terence and Liz in front of Lasers at emfcamp.

At a science-fiction convention, you queue for hours to hear a bit-part actor describe what it was like on the set of a forgotten sci-fi show. At a science-fact convention, you have a beer with a person who is literally changing the world with a laser cutter, some diodes, and a smattering of Python. Welcome to ElectroMagnetic Field! (I've stolen the subtitle from Ken MacLeod's description of…