2 layers98 × 27 mm
2 layers30 × 20 mm
MongDB Harness
- Size
- 30 × 20 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 5
- Nets
- 4
- Pads
- 18
- Tracks, vias
- 44, 5
- Routed
- Yes
- KiCad
- KiCad 0.0.1 (file 20241229)
- Created
- 26 Sep 2026
- Updated
- 3 Oct 2026
Overview
T04 is an open-source printed circuit board by jovianw, from the jovianw/ripple repository on GitHub. It is a 2-layer board of 30 × 20 mm with 5 parts on 4 nets, routed with 44 tracks and 5 vias.
Its parts include 2 resistors, 1 capacitor, 1 IC and 1 connector.
README
README.mdRipple
A self-improving harness that designs circuit boards from a spec, checks them against a hidden spec it never sees, and redesigns itself based on what fails.
See DESIGN.md for the design and task split, and AGENTS.md for ownership and rules (read this first if you're using a coding agent).
apps/worker/ # harness: agents/, tools/, harness/, db.ts
apps/web/ # Next.js UI
checks/ # hidden checker (agents never read)
packages/types/ # HarnessConfig, RunResult, Board, Lesson
specs/ # public spec text only
scripts/ # index setup, seed data, ablation runnerSetup: Node 22.13+, cp .env.example .env, npm install.
Parts
5| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 4.7kΩ | tscircuit:resistor_res0603 | R1, R2 |
| 1 | 100nF | tscircuit:capacitor_cap0603 | C1 |
| 1 | J1 | tscircuit:pin_header_pinrow4 | J1 |
| 1 | LM75B | tscircuit:LM75B | U1 |
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Questions
How big is the T04 PCB?
It measures 30 × 20 mm and has 2 copper layers, 1.6 mm thick.
What parts does the T04 use?
5 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 T04 KiCad files?
From the jovianw/ripple repository on GitHub, at the commit this page was made from: the board is apps/web/public/deliverables/t04/kicad/t04.kicad_pcb and its schematic apps/web/public/deliverables/t04/kicad/t04.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the T04 design in my own project?
Its repository states no licence, so its author keeps all rights: ask jovianw before reusing the design.