Bring Me The Head of Emperor Trajan!

A friend asked me to 3d print this 3D scan of Emperor Trajan. Its taken me a while to get round to it though (guiltguiltguilt!). I decided to chop the scan so just his head and shoulders were visible using Fusion 360’s mesh editing tools. I tried printing it upright originally, but it failed partwayContinue reading “Bring Me The Head of Emperor Trajan!”

Taking a Google Stadia Controller Apart and Dumping its ROM

I acquired one of these in a deal Google had running. After trying it out, I decided it wasn’t really for me, so I had an unused Stadia controller lying around…. The design is interesting; in order to reduce latency, it connects directly to Google via WiFi by itself, rather than locally to the Chromecast.Continue reading “Taking a Google Stadia Controller Apart and Dumping its ROM”

Identifying a thermocouple

Next up in the riveting Thermocouple series is how to identify an unknown thermocouple as a Type K. There are loads of videos on Youtube on this, but I didn’t find them completely conclusive. Many of them advise “checking the colours of the leads”. Surprise! There are at least six different standards for colour codingContinue reading “Identifying a thermocouple”

The Perils of cheap Ebay stuff, or, why doesn’t my MAX31855 thermocouple board work?

I’ve been playing around with Type K thermocouples for a project. These are cheap, commonly available, and can read a temperature range from –270C to 1260C (though it depends on the exact thermocouple). It looks similar to this (you stick the metal pointy end in the hot thing): The above is a Type K thermocouple,Continue reading “The Perils of cheap Ebay stuff, or, why doesn’t my MAX31855 thermocouple board work?”

What’s eating my Cotyledon Orbiculata?

It’s not been looking well for a while, poor thing….. Then I spotted the underside of the leaves were covered in little black things…. to the microscope! Aphids! Bastards! Well, getting rid of them is relatively easy: blasting it in the shower removes them. I could try some isopropyl alcohol, but I’m worried it’ll harmContinue reading “What’s eating my Cotyledon Orbiculata?”

Mini Tesla Coil kit from Ebay! (playing Bohemian Rhapsody)

I’ve been enjoying Electroboom’s Youtube channel, and was really interested in the various Tesla coil videos. I had a look at the OneTesla DIY kits: they look great, but way too expensive for an afternoon’s fun. Plus, shipping to the UK would likely be a faff. Somehow I had the idea to check on Ebay:Continue reading “Mini Tesla Coil kit from Ebay! (playing Bohemian Rhapsody)”

Writing A Speaker Horn Music Visualiser

As soon as I decided to add the 5×5 Blinkenlights matrix to the horn, it obviously needed to be turned into a music visualiser. Googling for “mopidy audio visualizer” found this post, where someone did exactly that. But it wasn’t on a Pi, ran some other software, didn’t talk to a 5×5 matrix, and –Continue reading “Writing A Speaker Horn Music Visualiser”

1920s Spotify Speaker Horn

I inherited an old “Revo” speaker horn from my dad. I have a strong suspicion he acquired it from a “job lot” in an auction somewhere. He gave it the rather fetching red/gold/black paint job. Anyway, its been in my flat looking kinda cool for ages: I wanted to make it even more cool 🙂Continue reading “1920s Spotify Speaker Horn”

New Tools!

I’ve been struggling with a pair of worn out snips for all my snipping/wire stripping needs for years. For some reason I didn’t realise that I could just.. order something better. I’ve now rectified this. From left to right: “Proster SN-28B” Dupont crimpers (and set). They’re not a brand I recognise, but seem to workContinue reading “New Tools!”

Turning an old Amazon Kindle into a eink development platform

I fancied getting an eink screen to use for future projects. I bought a wee one with a raspberry pi “hat” attached. However, I realised later that I could maybe just re-purpose an old Amazon Kindle ebook reader. I’ve messed with Kindles before, ages ago: I ported an Infocom interpreter and a Manga reader toContinue reading “Turning an old Amazon Kindle into a eink development platform”