I just saw these “qt py” boards from adafruit, they are so low profile and they seem to be either samd21, esp32 or rp2040 based. Search Results for 'qt py' on Adafruit Industries Adafruit Industries, Unique & fun DIY electronics and kits : Search Results - Tools Gift Certificates Arduin…

[image] Antun_Skuric: I was wondering if some of you have had a chance to test the simplefoc on these tiny mcus? I’ve tested on the SAMD21 version, but I was only running the code and testing communications, not really running a motor… They’re a bit low on pin-count, but otherwise no reason …

Nice! yeah, the pin count is really low. But they might allow for encoder based closed voltage closed loop control. Even maybe with current sensing. [image] I was wondering if this could be a good format for SimpleFOCmini.

I’m using the waveshare rp2040-zero which has almost the same footprint. (~4€) I never missed current sensing for gimbal motors. It builds a nice little package with the simpleFOC-mini. [_zero_mini-sandwich]

Nice! Is there some kind of standard dimension/pinout for these boards? It seems that they are more or less 18mm wide.

The waveshare version has a few more pins (23) which makes it 18x23.5mm. Unfortunately you can’t use these pins on a breadboard test-setup.

At least Seeed and Adafruit have agreed on the “standard” :smiley: @o_lampe is that your extruder?

Yes, it’s part of it. The whole setup looks like this: [3506VS2804]

What printer is it for? Did you open-source the designs? I’d be interested in trying it out sometime…

What are the advantages of using a BLDC in an extruder?

That’s a good question! For me, probably only that I have lots of BLDCs and drivers for them… Perhaps the motor can be more quiet and have more torque when driven with FOC. But that would work with a stepper motor also. But for the stepper the demands on MCU and sensor are much higher for FOC, due …

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Adafruit QT PY or Seeed Xiao boards and simplefoc

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question, qtpy

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