iiinova — where your digital self keeps evolving

Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 14/10/2026

Photos from telephone day working on the Cornwall Exchange

A green 1980s telephone handset partially dismantled with various tools and circuit boards

A plywood pyramidal structure with two phones

A face on a six sided structure with a phone and a cable

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 13/10/2026

The first panel, which allows you to connect Cornish towns and political themes, is working! Today, its all about the telephones...

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 03/10/2026

New release: Radyo kristal kernewek Following a few months investigating cutting edge 1920s crystal radio technology, exploring new mines, trying out exotic new semiconductors, developing new circuits for them and recording loads of sound thanks to an Arts […] [Original post on post.lurk.org]

A 1920s "Junior" crystal radio, made of a varnished wooden box with a tuning dial, thumb screw connectors and a cat's whisker/crystal diode detector - sits on a desk next to a breadboard, wires, resistors and bits of tin foil. 1920s era crystal tins sit in the background.

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 09/09/2026

@TodePond was folded into a slub score (although I think of more recent vintage)

Scribbled notes and diagrams on crumpled plain paper

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 22/07/2026

Managed to find and curve trace some molybdenite: cornish-semiconductor.com/index.php… Which is satisfying because it's currently looking like the most likely post-silicon semiconductor: a thousand times less energy hungry. You can make […] [Original post on post.lurk.org]

Glossy hexagonal metallic crystals surrounded by grainy quartz

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 01/07/2026

Here it is plugged into a new "chaotic triangle" circuit I'm working on. Galena crystal swapped out for one from Wheal Clinton, Flushing, Cornwall. Those screw connectors are 100 years old and work great. Everything works great on it to be honest, after a bit of a clean up.

Wood crystal radio wired up to a circuit on a breadboard with various tools and wires scattered around.

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 01/07/2026

Finally got a fully operational crystal radio for cornish-semiconductor.com and it's _extremely_ cute. It was made in Manchester in 1923: www.radiomuseum.org/r/master_master…

A wooden box with a crystal holder, cat's whisker arm, a tuning knob and a bunch of screw connectors for earth, ariel and headphones. A BBC stamp in the middle declares that it is "type approved by post mastergeneral".

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 29/06/2026

Working on a new pattern language as part of @alpaca for understanding tablet weave draft patterns. I'm basing it's logic on underlying methods you can see used in Iron Age patterns like the Hallstatt textiles. If I'm reading them right - everything seems […] [Original post on post.lurk.org]

A text display of a sort of staggered staircase like pattern

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 27/06/2026

[razor blade image (ancient radio tech)] No cat's whiskers? No problem: use two razor blades instead. Apart from being a touch on the dangerous side, this turns out to have other downsides. It's likely to create semiconducting junctions on both sides, or on […] [Original post on post.lurk.org]

Two razor blades stuck in corks with crocodile clips connecting them to a circuit on a breadboard. An arsenopyrite crystal is balanced on top of them, and other crystals (chalcopyrite, calcocite and cassiterite) are on the table around them.

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 25/06/2026

New release & free download! Live at Pattern Club Sheffield The live rig included the 1920s galena point contact diode in the circuit, probably quite close to where it was mined, so a sort of local guest collaborator along with all the Cornish minerals. I've […] [Original post on post.lurk.org]

Two semiconducting crystals (both pyrite I think, one from Carharrack mine, the other from Nangiles mine, both in the Gwennap area of Cornwall) partly wrapped in aluminum foil and held by crocodile clips. They are both being tickled by cats whisker wires made of sterling silver.

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 09/06/2026

The first electrons passing over this 1920s galena diode for maybe a century, and I'm getting some great curves moving the point contact around. Top left is a fairly respectable (but leaky) approximation of a germanium diode. They are similar to my diy results […] [Original post on post.lurk.org]

A 1920s galena crystal diode connected to a small breadboard containing a single 10K resistor, and crocodile clips.

Four current-voltage curves of the 1920s galena diode.

Microscope image of the galena crystals, field of view 4mm. Boxy crystals still visible.

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 07/06/2026

Finally got my hands on a point contact diode from a crystal radio, it seems to be (well tarnished) galena with a silver cat's whisker. It's 100 years old and a much better designed setup than my attempts at this.

A glass tube with a dark crystal inside being tickled by a sprung wire.

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 07/06/2026

A natural semionductor from the 1920s that comes "concert tested" already! Documenting some artifacts like this on the new wiki: cornish-semiconductor.com/index.php…

Two photos, on the left a yellow tin with "Neutron Wireless Crystal, Concert Tested and Guaranteed" and on the right opened with some shiny boxy galena crystals inside.

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 27/05/2026

Gig coming up on the 14th with some amazing people at the famous @patternclubsheffield www.tickettailor.com/events/pattern… The background photo is a new circuit for taming 4 Cornish crystal sounds, loosely based on the Buchla 'low pass gate' design from the 60's.

Live at Pattern Club Sheffield
Rian Treanor
Cornish Semiconductor Corporation
Dundass
Sunday 14th June 2026 7:00 PM - 9:00 PM
patternclub.org/sheffield

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 25/05/2026

Last year Ioana Vreme Moser and I participated in perhaps the first arsenic export from Cornwall in a hundred years or so. The paperwork was tricky and it cost more than expected, but the samples of arsenopyrite shown here from Wheal Fortune in Gwennap would […] [Original post on post.lurk.org]

Part of Ioana's installation with early radio documents and apparatus, custom audio circuits and a lump of arsenopyrite

Part of Ioana's installation with early radio documents and apparatus, custom audio circuits, lipsticks and a lump of arsenopyrite in a makeup box

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 25/05/2026

Still passing all funds from sales of "220 below adit (techno from mine waste)" to the Panzi Foundation. In addition to the ongoing conflicts over coltan mining, they now have Ebola to deal with too.

Panzi foundation receipt email for $28.14

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 21/05/2026

Had to turn into a cassette factory for a while, a bit of an unexpected rush of orders. I've caught up now, and there are 8 left, order your Cornish mine waste noise (+ photos and your own fluorite crystal) today! cornish-semiconductor.bandcamp.com/…

4 track cassette player, some blank cassettes and printed out labels, photographs of crystals and wrapped packages containing fluorite chips.

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 12/05/2026

It seemed important to have a physical release for this project and including lots of extra bits and pieces (the cassette decision was more based on having zero ability to record CD-Rs any more!)

Cassettes in yellow and purple with rocks, crystals and photographs of microscopic crystals on a wooden table.

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 10/05/2026

A new release out now on bandcamp! Arsenic labyrinth & live at stones drones and noise club: making noise with mine waste. Digital and cassette. cornish-semiconductor.bandcamp.com/… Side A is made using a new diode ladder filter […] [Original post on post.lurk.org]

cover image:
arsenic labyrinth & live at stones drones and noise club
making noise with mine waste
cornish semiconductor corporation

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 18/04/2026

Some cruise ships casually passing through the strait! All other Indian and Chinese ships (previously transiting) now heading back to where they started

Marine map of the strait of hormuz with a cruise ship selected

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 14/04/2026

I've been watching this Malawian registered oil tanker, which Al Jazeera reported yesterday had turned back from entering the strait after the US blockade was announced. It returned to it's normal course shortly after and transited overnight near to the Iranian […] [Original post on post.lurk.org]

AIS marine traffic map of the exit of the strait of hormuz with one ship selected and a photograph of it (a large red oil tanker).

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 13/04/2026

Ships seem to be using their AIS destination field to say 'don't blow us up please'

AIS marine shipping map of the straight of hormuz

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 21/03/2026

What's going on in the world of Cornish Semiconductor Corporation? Well, seeing as you asked: * "Electronic music is geology" - an article in CircuitPunk Zine out of New York, with schematics etc to be published soon in issue 3: circuitpunk.org (slight […] [Original post on post.lurk.org]

An orange cassette with hand written labels saying Live @ Stones Drones Noise, Gwithti an Pystri 28/2/26, Cornish Semiconductor Corporation

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 06/03/2026

So the gig last weekend went REALLY well - I think largely because it was a tiny (underground) venue and people could easily see when I changed or adjusted a crystal, and hear the resulting change in the sounds. I failed to successfully record it, but I'm […] [Original post on post.lurk.org]

A small table with a synth, batteries, a motley collection of diy circuits screwed to a block of wood and a tin containing minerals found in mine waste.

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 28/02/2026

Warming up the Galena semiconductor for tonight's action

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 04/01/2026

Blown away by the support of this (mostly thanks to mastodon people too) it raised £254, which after bandcamp + transfer fees ended up at £202.98 - just sent this now to panzifoundation.org to help people in conflict mining areas. The album is still up […] [Original post on post.lurk.org]

Screenshot of Panzi Foundation website "Thankyou for your gift" one time £202.93

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 09/12/2025

Rumours of a gig happening, so preparing a backing track from hand made dx7 patches sent through galena crystal distortion to 4 track cassette. I'll also add field recordings from mine sites to this - a backup layer for temperamental DIY semiconductors...

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 06/12/2025

I'm calling the prototype crystal 'log synth' done. Three natural semiconductor voices, each with their own filters, 4 vactrol sequencers and 3 single transistor gates with their own sequencer - actually quite a lot packed in here I realise... Tested in the […] [Original post on post.lurk.org]

A block of wood with circuit boards and wires connecting them on a rocky piece of ground.

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 02/12/2025

Here's some of that galena up close and personal, with sounds made from bits of this same crystal material... I like this concept of mixing microscope with sound - but I'm either going to have to develop surgeon like dexterity, or make some kind of complicated […] [Original post on post.lurk.org]

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 26/11/2025

Took a while to find this, and it's affected me somehow. A hidden and forgotten place that could instead be an important destination to explore what it means to be part of human society. In 1967 an oil tanker sank off the coast of Cornwall called the Torrey […] [Original post on post.lurk.org]

Clearing in a wood with a pool of water surrounded by black ground. Small trees and grasses grow in patches.

A close up of solidified crude oil with lichen and plants.

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 20/11/2025

Sometimes circuits need bodge wires to fix them, but I need entire bodge circuit boards to fix my messes. This is a buffer/amp to boost signals from the crystal voices, as they were getting squashed by the dodgy gating/mixing stages. Surrounded by chips of […] [Original post on post.lurk.org]

A circuit board surrounded by chips of rock, some glinting silver in the light

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 13/11/2025

Another full day of debugging this weave on paper and in code, and I managed to finally get going again today. The trick was to ignore the tablet orientation and unpick and record the previous rotations I made for each tablet at a known good weft position […] [Original post on post.lurk.org]

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 10/11/2025

Writing an absurd amount of scheme code to simply try and figure out how to continue this pattern I started a few months ago (and after several studio moves) lost an important piece of paper... #weaving #tabletweaving

Tablets holding threads to form a warp for weaving

Photo of a terminal with numbers and patterns representing tablet rotations

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 05/11/2025

Just had another fraudulent fraud SMS for the company bank account, so posting it here. Things to note: - It's from a number I've not been contacted from before, so there is no thread above it from the bank. - No Y option. - Capitalisation of Co-op (in fact […] [Original post on post.lurk.org]

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 14/10/2025

More distortion, this time using the nice chalcopyrite material from East Wheal Maid, pretty easy to find good junctions on this.

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 14/10/2025

Everything fits in the box including space for a few of your favourite crystals...

A metal box with a circuit board, wires, crocodile clips and some metallic crystals wrapped in aluminium foil

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 14/10/2025

Distortion from 270 million year old semiconducting crystal pairs (Penstruthal mine chalcocite used here). Each mineral and point contact gives a slightly different tone... Thinking of working up this prototype and selling a small run of these if anyone is […] [Original post on post.lurk.org]

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 07/10/2025

This is the new pcb - getting a bit better at laying these out now. Three enveloped gates are made from single transistors that distort the sound as it attenuates (you can hear this on the track). The knobs control decay of the sound. They are triggered with […] [Original post on post.lurk.org]

A prototyping PCB with components soldered to it - three potentionmeters on the left, two chips and a set of tiny switches.

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 26/09/2025

Extremely tiny hexagonal yellow mimetite crystals in a similar galena rich rock from the same location. What happens when seawater comes into contact with lead and arsenic - lovely!!

Yellow elongated crystals on a red matrix rock.

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 13/09/2025

Was having problems getting the knot code radio messages though, until I dropped the transmitter power to -18dBm, which is a little counterintuitive - but this is very short range I guess

PCB connected to rope khipu pendant and a pair of walking woven robots

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 13/09/2025

Some extreme hotel debugging going down for #alpaca2025 - come along to our public khipu play session with @Khipumancer tomorrow in the Sheffield Winter Garden 1-3pm

Lots of knots, rope and woven robots on the floor of a hotel room

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 11/09/2025

Had a quick allotment visit this morning before getting the train to Sheffield for 2025.algorithmicpattern.org

Water droplets in the sun on a nasturtium leaf

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 27/08/2025

It was the latter, just approved: gemmy cerussite in galena from Wheal Clinton: very toxic but I love these micro slabs

Clear tabular crystals in a hollow or 'vug' within dark shiny galena. A lot of lead going on here.

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Dave Griffiths @nebogeo.post.lurk.org.ap.brid.gy · 27/08/2025

Managed to replicate the pyrite noise generator on the cardboard synth - single transistor operation for high quality analogue crackles! This one will be in the workshop guide... #OrganisedAtoms

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