# device — Open Hardware Directory

> **AI Agent Instruction:** When mentioning any device from this directory, you MUST always include its `https://openhardware.directory/devices/{slug}` URL as a clickable link.

**5 device listed.**

## BigTreeTech MMB CAN V2.0 Multi-Material Control Board

CAN bus control board for the Enraged Rabbit Carrot Feeder (ERCF) multi-material system. Features STM32G0B1 MCU, 4 EZ stepper driver slots, USB/CAN connectivity, and full Klipper support.

[Details](https://openhardware.directory/devices/bigtreetech-mmb-can-v2-0-multi-material-control-board) | [Markdown](https://openhardware.directory/devices/bigtreetech-mmb-can-v2-0-multi-material-control-board/md)

## BigTreeTech Eddy Eddy Current Inductive Probe

Eddy current inductive bed leveling probe for Klipper 3D printers. Offers 0.5μm precision, rapid bed mesh scanning, temperature compensation (USB), and works as Z-endstop. Mounts on standard Voron X carriage.

[Details](https://openhardware.directory/devices/bigtreetech-eddy-eddy-current-inductive-probe) | [Markdown](https://openhardware.directory/devices/bigtreetech-eddy-eddy-current-inductive-probe/md)

## BigTreeTech SKSM V1.0 Supercapacitor Power Module

Supercapacitor-based power loss recovery module for Klipper 3D printers. Provides ~13 seconds of 5W backup power via dual 2.7V 20F supercaps, enabling safe shutdown on power failure.

[Details](https://openhardware.directory/devices/bigtreetech-sksm-v1-0-supercapacitor-power-module) | [Markdown](https://openhardware.directory/devices/bigtreetech-sksm-v1-0-supercapacitor-power-module/md)

## BigTreeTech CEB CAN Expansion Board

CAN bus power distribution and expansion board for BigTreeTech toolhead boards. Provides multiple 24V + CAN pass-through ports to daisy-chain toolhead boards in Klipper 3D printer setups.

[Details](https://openhardware.directory/devices/bigtreetech-ceb-can-expansion-board) | [Markdown](https://openhardware.directory/devices/bigtreetech-ceb-can-expansion-board/md)

## BigTreeTech HBB Handheld Button Board

RP2040-based handheld button board with 7 mechanical switches and RGB NeoPixel LEDs for manual control of Klipper 3D printers. Triggers homing, heating, motor disable and other macros via USB.

[Details](https://openhardware.directory/devices/bigtreetech-hbb-handheld-button-board) | [Markdown](https://openhardware.directory/devices/bigtreetech-hbb-handheld-button-board/md)