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Lukes Laboratory

HUVUD Toolboard

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    V.62 Keeps all the HUVUD you trust but adds a termination resistor+Jumper, and capacitors for a cleaner accelerometer reading!

    Now at a lower price to boot!

    Speaking of Boot-ing, Huvuds will come pre-flashed with CANBOOT!

    Use the bundle widget above to get quantity discounts.

    If you're looking for setup, configuration, and other questions join my discord! - Great video explaining why CAN toolheads are so interesting!

    Controller Board designed for use with Klipper firmware, especially for extruders to simplify wiring without losing features. Comes with complete connector set needed.

    The HUVUD toolboard is designed to simplify wiring and configuration for extruders on klipper-based machines, particularily useful for toolchangers or extra large machines, but provides advantages for even the smallest of machines.

    CAN adapters in the meantime (aff links):

    • Waveshare - Good for One HUVUD
    • Innomaker - I've used this on 3x printers with a single huvud. I can work to find the firmware version with the multi-huvud fix.

    All Sales support the original creator!

    Key Features (V.62):

    • Simplifies Wiring for any extruder head down to 4 wires - Skip the wire bundle!

      • V+, V-, Can_H, Can_L

    • Designed for serial tunneling through CAN

      • Now comes with modifiable traces to enable direct serial thru the 4pin header
      • Now comes with jumper for termination resistor!
    • Uses a 32bit STM32F103 MCU

    • IO include:

      • 3x Endstop Pins W/ 5v

      • 2x Thermistor (Compatible with Thermistors and PT1000) REV 2/15/2022 Now using a .1% pullup resistor for supreme high-temperature accuracy!

      • 2 PWM fan outputs

      • Heater Output - 6A MAX

      • 4 wire Stepper Motor

      • Single-connector CAN+Power

      • USB connector for Flashing Firmware and can double as backup signaling

      • TMC 2209 stepper driver with digital current control

      • Indicator LED’s for quick status updates

      • ADXL345 onboard for easy input shaping and future features

    CAN distribution board is currently in development which will combine same single-connector design for multiple toolboards on a single machine.

    Changes from last produced set (V.5)

    • Added extra thermistor channel
    • Added 2x endstop channels
    • Endstops now support 5v
    • Cuttable traces on the backside now supports direct serial over 4-pin connector
    • Now comes in black!








    Step:PB3 |  Dir:PB4  | EN: PB5 | UART: PA10 | TX:PA9


    .110 Sense Resistor

    Max recommended current – 1A RMS



    Screw Terminal

    Max recommended 6A


    PA0, PA1

    JST PH 3 Position

    2.2k pullup .1%

    Fan 1


    JST PH 2 Position

    Max 1A

    Fan 0


    JST PH 2 Position

    Max 1A

    Endstop Connector

    PB10, PB11, PB12

    JST PH 5 Position

    5v Tolerant

    Motor Connector

    JST XH 4 Position

    Pairs noted on board




    Spare Header

    CLK:PA14 | BOOT1:PB2 | SWDIO:PA13

    Dupont 3x2 Header

    Short Boot1 with 3.3V to enter bootloader mode


    PA11, PA12

    Micro USB

    No 5v+ input

    Input Connector

    CANH/CANL: (PB8/PB9) / USB: (PA11/PA12)

    Microfit 3.0 2x2

    CAN input default – Use solder bridges on backside to enable USB connection