Jofre Oliveras — Studies ← Studies
S-004 · 2026 · Instruments

Fossil Synths

Functional PCB instruments in fossil form.
open sourceresonancetactileexpressivecymatics
drag to orbit
01 — The project

Anatomy as circuit

Fossil Synths is a family of playable art objects: real, manufacturable printed circuit boards whose copper is drawn as fossil anatomy. The trace routing follows the logic of the organism — chambers, segments, ribs — so that the electrical function and the fossil form are one and the same drawing.

The choice of fossils is the concept, not a style. A fossil is time made mineral: life that endured for hundreds of millions of years and survives only as an imprint in stone. Redrawing these creatures as state-of-the-art electronics makes the prehistoric futuristic — and turns the same gaze back on us. Every device we manufacture today is a fossil in waiting: our circuit boards will one day be read in the strata as the index fossils of the digital age, ruins of a civilisation that measured itself in gigahertz. Fossil Synths plays with that double time — instruments that sound in the present, drawn as what they will inevitably become.

Each board is a self-contained electronic instrument. Exposed gold copper (ENIG) on matte black solder mask makes the circuit legible as engraving: the component becomes ornament, the ornament is functional, and every creature is a production-ready file, not a rendering. The series also carries an inversion — creatures that geology compressed into fossil fuel return here as instruments, and, in the closing proposal, as candidates to draw part of their life from ambient light instead of burning anything.

The collection

Two creatures, one language

Ammonode

Ammonite — chambered spiral shell

A harmonic touch synthesizer. Eighteen chambers of the shell are touch electrodes — each fires a note, and sequences climb the spiral as arpeggios of sound and light. Cymatics and a Schumann coil.

Trilobeat

Trilobite — segmented exoskeleton

A step sequencer / groovebox. The twenty segments of the exoskeleton are touch-sensitive steps; patterns run down the animal's back as light, with an OLED and encoders in the cephalon.

Both instruments share a design language — gold on black, anatomy as routing, touch as the primary interface — and are conceived for exhibition, live performance and limited production.

02 / 03 — Architecture

How they are built

Ammonode

Harmonic touch synthesizer
MCU
STM32L496 — native capacitive sensing, USB
Touch
18 chamber electrodes, read by the MCU
Light
18 × SK6812 MINI-E, one per chamber
Audio
PCM5102 DAC → 3.5 mm line out
Motion
LIS3DH — tilt changes arpeggio mode

Trilobeat

Step sequencer / groovebox
MCU
STM32H743ZI — 480 MHz, audio synthesis
Touch
4 × MPR121 — segment electrodes
Light
20 × WS2812B addressable LEDs
Display
OLED SSD1322, 256×64, 16-level yellow
Audio
PCM5102A DAC → 3.5 mm line out
Controls
3 × EC11 encoders + expansion header
Dossier

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