I used the extra 5V pins to power the LED ring around the button on my funwheel so it lights up when the board is powered.
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I can report that 3 out of 5 focers show the power regulation issue. All five of them are from the dreaded lot 88ASYCTG4. When ramping up the voltage on them the 5 volt rail stops at 5,2V for the good ones and exceeds 5,2V on the bad ones. I hope i did not break the other parts on the 5V rail by going up to 5,5V. Will replace the bad DRVs, waiting on new ones from china. By the way @shaman excellent work with the FOCers the good ones perform like a charm.
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I’m glad you took caution in powering up the boards. Going up to 5.5V shouldn’t have hurt anything. Glad the good ones are working well!
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Would love to see the wire routing and internal packaging of this.
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Hi, I will hopefully have fully assembled unit by the end of the weekend. Here is a link to an update/more info.
I was hoping the picture would show up but it does not in the preview, so here it is 
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Perhaps someone could help me… I tried to flash my second FOCer, but during the flash, when verification started it stucked (for some reason), verification failed and now I cannot connect to MCU anymore… is there something I can do? I tried several STM-LINK programmers, double checked all pins and it still connects to good FOCer, but this one is not able to connect…
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You have probably bricked the MCU, you will need to reset it manually and program it afterwards.
https://www.youtube.com/watch?v=jEz0C2bT2M0&t=2s This may help you program it from scratch.
First do as he says, erase the memory, flash bootloader and then firmware all possible through the st-linkV2
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nice reference.
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If I could buy you a cup of coffee… man… I would do that. Now I simply say Thank you. You just saved me the whole evening of soldering another FOCer as I thought this is screwed. Appreciate that.
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No problem, glad I could help!
Would like to see some pictures of it taken apart.
What kind of cost is there for the stamped metal parts?
At the moment it is just a shell 
the insides is empty. All it contains is some bare PCBs. I will post pictures once there actually is something to show. The cost of just the enclosure is around 10-15€ if you buy one. I will be making 20 units which I considered the minimum to buy to get quantity discounts on parts and based on that I will put them in enclosures or just the front panel etc… I will update this on probably my own thread to not hijack this
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Edit: Got removed the build question, got it working, likely was an issue on my side. I rebuilt everything including bringing over the drv file changes and it detected the same now.
I was going to test if the additional hall effect sensor filtering was helpful on my onewheel: https://github.com/vedderb/bldc/issues/182
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The additional software filtering helped out a ton for my onewheel at higher motor currents (which helped out with motor torque at low speeds). I might look at increasing the hall effect filter from the 2.2k on the focer to the 100ohm was tried out on that github issue.
If anyone wants a build to test out let me know.
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I wonder if the high currents through the motor is causing a lot of noise to get coupled into the Hall effect sensor signals. I might check this out under the oscilloscope
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Can’t see how a Trampa vesc is relevant in this topic.
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…and $785.00!!!
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