2 layers73.7 × 45.5 mm EPD 3D G6, the printed circuit board in 3D

EPD 3D G6

[SUTD 02.180DH Worldbuilding: Critical and Creative Practices] a mechatronic interactive sculpture as a speculative design exercise

Open in PCBKit

Size: 73.7 × 45.5 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 41
Nets: 30
Pads: 98
Tracks, vias: 115, 0
Pours: 1
Routed: Yes
KiCad: KiCad 10.0 (file 20260206)
Created: 6 Aug 2026
Updated: 10 Aug 2026

Overview

EPD 3D G6 is an open-source printed circuit board by markantosa, from the markantosa/proofoffeeling repository on GitHub. It is a 2-layer board of 73.7 × 45.5 mm with 41 parts on 30 nets, routed with 115 tracks and 0 vias.

Its parts include 12 resistors, 9 diodes, 5 connectors, 3 capacitors and 2 ICs.

README

README.md

Proof of Feeling

Affective Core AC-7 — a speculative mechatronic artefact: an artificial robotic heart that makes a humanoid AI's internal state visible through pulse, motion, and light.

Proof of Feeling — rendered artificial heart with exposed PCB, mounted on its display stand
_{Render made in Blender.}

_{▶ Short demo — watch on YouTube}

See docs/design-reference.md for the full project concept and design brief.

Repository Layout

text

.
├── docs/               Project-wide documentation
│   ├── design-reference.md          Project context/story + physical prototype
│   └── pcb-design-reference.md      KiCad 10 PCB design reference
├── firmware/           ESP32-C6-Supermini embedded firmware
│   ├── src/             Servo sweep, LED chase, proximity speed, eye animation, BLE telemetry
│   └── include/          Pin assignments, tunables, BLE UUIDs
├── dashboard/          BLE debug dashboard — ASCII face/sonar/heartbeat, Web Bluetooth (Chrome/Edge only)
├── electronics/        KiCad PCB project (single-layer milled board)
└── mechanical/         3D models — printable STL/3MF tracked via Git LFS; source .blend files not included yet

Hardware Summary

ESP32-C6-Supermini
2x SG92R micro servos, 5V (continuous 0–180° sweep, mirrored) — chosen over MG995 for size
HC-SR04 ultrasonic sensor (proximity → continuous speed control)
1x momentary button, wired but currently unused by firmware
8x auxiliary LEDs, top-to-bottom chase ("pulse point" glow array)
I2C OLED (SSD1306-class), 4-pin header — always-on blinking eye
BLE telemetry (built-in radio) — feeds the debug dashboard, see below
Custom single-layer milled PCB (KiCad, electronics/)
Powered via 5V DC barrel plug

Tools

3D modelling — Blender
PCB design — KiCad
Firmware — written with the aid of Claude

Credits

Heart geometry developed from Realistic Human Heart (Sketchfab)

3D render of the populated AC-7 main board

_{Populated board render}

AC-7 PCB routing — single-layer milled board, B.Cu traces

_{B.Cu routing}

AC-7 board mid-fabrication on a desktop CNC isolation mill

_{Desktop CNC isolation milling}

Build

_Assembly

Finished AC-7 artefact — assembled artificial heart on its display stand

_{Finished artefact}

Getting Started

Project context, story, and what a viewer experiences: docs/design-reference.md
Firmware build/flash instructions: firmware/README.md
PCB design reference: docs/pcb-design-reference.md
KiCad project: electronics/EPD 3D G6.kicad_pro
BLE debug dashboard: dashboard/index.html — open directly in Chrome or Edge (desktop/Android; Web Bluetooth isn't supported in Firefox/Safari), click Connect, pick "AC-7"

Parts

Qty	Value	Footprint	References
8	LED	LED_THT:LED_D5.0mm	D1, D2, D3, D4, D6, D9, D10, D11
8	R	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R1, R2, R3, R4, R6, R9, R10, R11
2	100nF	Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm	C1, C2
2	4.7k	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R14, R15
2	Conn_01x03	Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Vertical	J2, J3
2	Conn_01x04	Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical	J4, J5
2	Conn_01x10	Connector_PinSocket_2.54mm:PinSocket_1x10_P2.54mm_Vertical	U1, U2
1	1k	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R12
1	2k	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R13
1	Barrel_Jack	Connector_BarrelJack:BarrelJack_GCT_DCJ200-10-A_Horizontal	J1
1	C_Polarized	Capacitor_THT:CP_Radial_D8.0mm_P3.50mm	C3
1	D_Schottky	Diode_THT:D_DO-201AD_P15.24mm_Horizontal	D12
1	SW_Push	Button_Switch_THT:SW_PUSH_6mm	SW1

The 32 most common of 41 parts.

Questions

How big is the EPD 3D G6 PCB?

It measures 73.7 × 45.5 mm and has 2 copper layers, 1.6 mm thick.

What parts does the EPD 3D G6 use?

41 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the EPD 3D G6 KiCad files?

From the markantosa/proofoffeeling repository on GitHub, at the commit this page was made from: the board is electronics/EPD 3D G6.kicad_pcb and its schematic electronics/EPD 3D G6.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the EPD 3D G6 design in my own project?

Its repository states no licence, so its author keeps all rights: ask markantosa before reusing the design.

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/markantosa-proofoffeeling" title="EPD 3D G6 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/markantosa-proofoffeeling.jpg" alt="EPD 3D G6" width="1200" height="900">

A picture that opens the board, for a README

[![EPD 3D G6](https://pcbkit.io/embed/boards/markantosa-proofoffeeling.jpg?size=s)](https://pcbkit.io/boards/markantosa-proofoffeeling)

Source

Repository: markantosa/proofoffeeling
Board file: electronics/EPD 3D G6.kicad_pcb
Commit: 52a0539
Licence: Not stated

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