59 lines
1.4 KiB
Markdown
59 lines
1.4 KiB
Markdown
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# Versions of the Huvud Toolboard
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## 0.50
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Volume production about to start
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+ 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.
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* Removed the 4 pin CAN connector
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* Added ESD protection on the CAN bus
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+ Test pads on the bottom for production testing
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# Prototypes
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## 0.3
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First Version
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* 4.7k thermistor pullup
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* 0.100ohm sense resistor for the TMC2209
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+ It works!!!
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- External 3.3V voltage regulator
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- No USB, has to be flashed with an ST-LINK
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- Very noisy thermistor signal (only seen when measuring, still works good in klipper)
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* No SMDs smaller than 0603
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## 0.4
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+ USB
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+ On board 3.3V voltage regulator
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+ 110ohm sense resistor
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## 0.41
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* 2.2k thermistor pullup to allow the use of PT1000 temperature proble
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* Smaller size. 42x42 mm with 31x31 mm screw pattern, matches NEMA 17.
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* Most small SMDs are 0402
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* Most connectors changed to JST-PH 2.0 mm
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* ESD protection on endstop and thermistor
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- Weak heater MOSFET (max 4A with no margins at all)
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- Forgot the pins for BOOT1, it's not possible to enter the bootloader
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## 0.44
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+ Greatly reduced ripple on 3.3V by redesigning and changing to a different voltage regulator IC
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+ Greatly reduced thermistor noise, proper filtering of VREF
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