Photograph of Atari 2600
Evan-Amos / Wikimedia Commons / Public domain

First mass-market cartridge console. Harmony-style flash carts and RGB/composite kits remain active.

Also known as: VCS, Atari 2600 Junior

Published open-source PCB projects

Atari 2600 composite AV mod board Open source · MIT

Atari 2600 composite AV mod

Open composite-video and audio upgrade board for Atari 2600 consoles.

Other catalogued projects

Mod License Notes
UnoCart-2600 Open source (GPL-3.0-or-later) Open STM32 flash cartridge for Atari 2600 ROMs.
Harmony Cartridge Mixed / partial source Popular commercial 2600 multicart. Firmware has published pieces; hardware is closed.
PlusCart Open source (GPL-3.0-or-later) Wi-Fi 2600 cartridge with published firmware.
2600 RGB / composite kits Mixed / partial source Video upgrade boards for heavy-sixer through Junior.

Browse these projects in the 3D PCB mod directory. Open-source rows can be shallow-cloned into the git bucket. Generated board renders belong on the artifact CDN, not in git. See the catalog wiki note.