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Versions of the Huvud Toolboard

Render of Huvud v.050

0.50

Volume production about to start

  • Changed the power connector from a 2x1 Molex Micro-fit to a 2x2. The 2 extra pins are used for CAN bus. Allows one single connector back to klippy.
  • Removed the 4 pin CAN connector
  • Added ESD protection on the CAN bus
  • Test pads on the bottom for production testing

Prototypes

Pre production version

0.3

First Version

  • 4.7k thermistor pullup
  • 0.100ohm sense resistor for the TMC2209
  • It works!!!
  • External 3.3V voltage regulator
  • No USB, has to be flashed with an ST-LINK
  • Very noisy thermistor signal (only seen when measuring, still works good in klipper)
  • No SMDs smaller than 0603

0.4

  • USB
  • On board 3.3V voltage regulator
  • 110ohm sense resistor

0.41

  • 2.2k thermistor pullup to allow the use of PT1000 temperature proble
  • Smaller size. 42x42 mm with 31x31 mm screw pattern, matches NEMA 17.
  • Most small SMDs are 0402
  • Most connectors changed to JST-PH 2.0 mm
  • ESD protection on endstop and thermistor
  • Weak heater MOSFET (max 4A with no margins at all)
  • Forgot the pins for BOOT1, it's not possible to enter the bootloader

0.44

  • Greatly reduced ripple on 3.3V by redesigning and changing to a different voltage regulator IC
  • Greatly reduced thermistor noise, proper filtering of VREF