Hydra

Run up to 8 hotends from a single board. Hydra is a dedicated control board for hotend-changer and toolchanger printers. It puts every tool's heating, cooling, lighting and sensing on one board, so you don't need a separate board for each hotend.

What it handles

• Up to 8 hotends: one board for your whole tool rack
• Up to 9 fan sets: cooling for every tool, plus a spare. Fan voltage is selectable between 5V and 24V, so you can run whichever fans your tools use
• Up to 8 LED chains: lighting for each tool
• 8 end stop ports: wire in filament sensors, dock detection, or whatever per-tool sensing your build needs. Voltage is selectable between 3.3V and 5V to match your sensors
• CAN or USB: connects to your host however your build is already wired

Who it's for

Makers building a new multi-hotend machine or upgrading an existing hotend changer who want one purpose-built board in charge of every tool.

Documentation

Full documentation and project files are on GitHub.