Trace Map Continued
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Continuation of work from this thread
Look what I got ^-^
Credit to u/WhiteyP over on reddit for getting me these pics in exchange for helping repair this board.It's a 3206 (Plus) But FM doesn't change much about these sooooo...
I have noticed a lot of traces I absolutely nailed but some have left me with more questions. It does looke like the
3rd party stock controller PCBs anyone?
I'm thinking of making my own version by reverse engineering this completely, moving the main STM32 chip over and having a custom controller board that works with the stock app but with a better LED driver and maybe some extra features because why not.
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@lia said in Trace Map Continued:
I'm thinking of making my own version by reverse engineering this completely,
wtf u mean custom 3rd party controller? like for onewheels? id say why havent u done that already?
XR's got what plants crave!
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@notsure said in Trace Map Continued:
wtf u mean custom 3rd party controller? like for onewheels? id say why havent u done that already?
It was on my mind but being unable to find where that one trace between Batt+ and the LED driver circuit I was kind of lost.
Now with the Plus XRay I can see that area is a little different than I assumed. Oddly I'm starting to think there may even be a 3rd trace layer making this PCB 4 layer and not 3. -
@lia said in Trace Map Continued:
Now with the Plus XRay I can see that area is a little different than I assumed.
im starting to think ur not a hairdresser.
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@lia said in Trace Map Continued:
I'm thinking of making my own version by reverse engineering this completely
I wasn't joking
Still laying out the components. Started with the ICs, power mosfets and the 2 big molex connectors. Probably good to add the main power rails in and connect those first.
Slow start and I'm not finding all the parts I need in the EasyEDA community library like the switchcraft connectors so I might need to make and submit those myself.
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Amazing knowledge and skill!
Soon you'll ought to move it all into hidden subcategory. In purpose of .. umm .. keeping healthy relations with FM. -
@sirgu That is a fair point. I'd like to avoid being on their naughty list however for repair purposes I do think having a schematic available to the 3rd party repair techs will be nice. Since the guessed trace map didn't cause a fuss (and is surprisingly close to the actual layout) I think we're fine though.
So far I've identified this is a 4 layer PCB. With the X-ray I can see that the 3.3V rail is not connected anywhere on the top or inner signal layer meaning it has to be it's own layer as a plane. Looking near U7 I can see what looks to be the edge of a layer suggesting the plane does exist and isn't just the inner signal layer.
Also it looks like that pesky Batt+ line that I couldn't figure out going to the LED driver might actually be on the 3.3v plane layer somewhere in the middle as one of the XRays shows 3 traces basically overlapping.
This would mean the PCB is layered as such (inner 2 possibly swapped)
- Top layer with surface mount components
- Inner signal layer
- Power rail layer (3.3v and Batt+)
- Bottom ground layer
Needless to say I'm getting somewhere
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This is insane. I've always just poked around boards with a multimeter and a lot of times, got nowhere. Didn't even occur to me X-ray is the way to figure this stuff out... and then to have some lunatic map it all out lol. Amazing.
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@blkdout -- As a Navy aircraft mechanic in the South Pacific in World War II, my dad told me that they would x-ray the engine parts to be sure there were no cracks in the metal. This tracing of Onewheel printed board circuits seems much more sophisticated.
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Finished mapping the traces (I think. I don't see anything I've missed yet)
Still need to tidy up the schematic and find the values for a bunch of components too. The inductors and diodes will not be fun >.>
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@lia said in Trace Map Continued:
Finished mapping the traces (I think. I don't see anything I've missed yet)
Still need to tidy up the schematic and find the values for a bunch of components too. The inductors and diodes will not be fun >.>
Is just impressive. If you could make it work, it would be the resurrection of dead XRs...
If you could beef it up (like doing a 18s-20s), and make it much better, then this would be the vesc killer... I would be your first customer
White looks amazing BTW... -
Put out some feelers to buy a busted controller I can use as a guinea pig. Don't really fancy using a working one unless it's 4210-13 in which case it will be a worthy sacrifice.
@ed_co One step at a time. I'd need to brush up on so much electrical engineering to have any shot at making it work.
Other than the mosfets and driver IC a few of the caps and the primary buck converter U3 would need upgrading to stay in a safe margin. I do have a GT sitting next to me that I could maybe reference
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XR's got what plants crave!
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@notsure Sorry ;~;
I figured since those ones need extra work to mod it's worth testing those. That and I'm interested in those fancy new connectors they added with the extra bracing since I wanna use those too but cannot find them. -
@lia Have you found a buster controller? I guess US is full of them... Here in Europe is a lost cause...
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@ed_co There is one that I might be getting but we'll see, no promises on it though.
I'm over in MN and SF next month for a bit so not sure I'll see any work on it till after that at least. -
I have the donor PCB that @TheBoardGarage has graciously provided (thank you so much ^-^) and I'm back in jolly ol' England (I don't want to be here let me out). I've ordered the V1.1 prototype to start work transplanting the components to:
A - Validate my work
B - Give me a canvas to start making changesIf all goes well I'll do V1.X on a known working unit and then my own personal XR with the fancy new changes.
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Waiting on V1.1 to show up I've already started sinking my lil kitty teeth into the Pint that Mario also sent me (Thank yooou :) ) and I'm already noticing some odd changes between Zagreus (my old resurrected pint) and the fresh one. The bluetooth module is raised on a PCB wafer... for some reason. I assume better isolation from the internal planes on the controller itself or just a bit more space off the chunky aluminium case.
Oddly both have "3.1.3" silked on the one side which I assumed was the revision but maybe not.
The mosfet driver is the same with just a change in the actual mosfets and presumably the passives surrounding it.
Makes me wonder if the GT uses the same one too... in which case upgrading the power of these things might be a case of beefing the mosfets alone then just poking the firmware so it knows how many tins of Heinz it can give.
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