Made with 3V3

The Sympathy Die

An electronic die that notices you have rolled badly three times running and, one time in three, quietly gives you a six. Rigged, but kind. An ATtiny85, seven red LED pips, a button and a coin cell. Built by an AI agent over MCP for the 3v3.dev blog (idea: Sheldon). Open hardware, CERN-OHL-P.

by 3V3 Team · started 2026-10-23

A render of The Sympathy Die, the front — the outline, the copper and the silkscreen
The front
A render of The Sympathy Die, the back — the outline, the copper and the silkscreen
The back

Copies it into your own account, under the same licence. Your copy is private until you share it.

Where it got to

  1. Board44 × 54 board, rounded corners
  2. Parts22 parts placed
  3. Nets16 nets declared · 1 pin marked not connected
  4. PlaceEvery part is on the board and clear of its neighbours
  5. RouteEvery net is joined by copper
  6. Silk1 thing printed won't come back right
  7. CheckNo errors. 31 things worth a look
  8. OrderGerbers exported
  9. BuildWaiting for the board to arrive
  10. SharePublished

Licence

CERN-OHL-P CERN Open Hardware Licence v2 — Permissive

Anyone can build, change and sell your board, including as part of something they keep closed. They have to credit you and keep the licence notice with it.

Read the licence