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Inductores

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Everything posted by Inductores

  1. Hi all, I was wondering if some of you would be interested in developing an open-source EUC motherboard to substitute some of the current motherboards provided by the manufacturers. The advantage of this? Completely custom design and free for the community! I'm able to design the board related to the hardware (from schematics, to layout, manufacturing and assembling), but I'm definitely NOT good at firmware in any of the cases (uC, FPGA, SoC...). That's why I would like to know if there is some interested person to collaborate with the SW/FW part in this project. I would like to make the design for my current EUC (Rockwheel GT16), but I don't mind to make the layout for any other EUC (the schematics would be 99% the same). If there is a REALLY interested person to help me, I offer myself to give away a custom motherboard(s) for free to test and develop the FW (and SW if possible, but I guess Wheellog would be a good start). Any interested to collaborate?
  2. Inductores

    Open-source EUC motherboard

    You're right, so getting the schematics from the original board is a way to understand how it works and then it can be a point of reference for a new design.
  3. Inductores

    Open-source EUC motherboard

    Today was a productive day
  4. Inductores

    Open-source EUC motherboard

    I don't know if you have access to the paper, but I do, and the picture of the designed EUC is very similar (I would say almost identical) to an Inmotion V5: It would be interesting to know the uC used in the Inmotion V5 board to know if the design is identical.
  5. Inductores

    Open-source EUC motherboard

    Some new components added, step by step...
  6. Inductores

    Gyroscope IC sensor used in the GT16

    Hi all, I would like to know if some of you knows which gyroscope sensor implements the GT16. I think it's one from TDK InvenSense, but not sure. It would be great if you can give me some info. Thanks!
  7. Inductores

    Gyroscope IC sensor used in the GT16

    Confirmed, MPU-6500
  8. Inductores

    Open-source EUC motherboard

    Some resistors added, as well as copper planes and drills
  9. Inductores

    Open-source EUC motherboard

    Some progress made...
  10. Inductores

    Open-source EUC motherboard

    Enough for today... But as you can see, the idea to import the copper planes seems to work
  11. Inductores

    Open-source EUC motherboard

    TOP layer is ready too So let's start to place footprints!
  12. Inductores

    Open-source EUC motherboard

    Great to know, but I still need some time to make the schematics! According to some electronic components for a (possible) improved board: uC: Yes, most of our EUC's have a STM32F103 uC on it (which is actually great according to performance/cost). But I was thinking about using Arduino because of the large amount of available libraries. Definitely not a 8-bit uC but I was thinking about the ATSAMD21G18: https://www.microchip.com/wwwproducts/en/ATsamd21g18 I know the Arduino DUE is more "powerful", but I guess a ARM Cortex-M0+ based uC should be good enough for our purpose. And it could be easily FW-upgraded by USB and Bluetooth. And about the Gyro+Accelerometer... even though the MPU-6050 is the one use in our EUC's... https://www.invensense.com/products/motion-tracking/6-axis/mpu-6050/ ...is sadly going to be retired (NRND part, Not Recommended for New Designs), but there are some new devices by the same company, and I found this one: https://www.invensense.com/products/motion-tracking/6-axis/icm-20601/ Not really sure about the performance, but at least as good as the previous one.
  13. Inductores

    Open-source EUC motherboard

    A little bit of both, I need a new working board hahaha I use Mentor Graphics because it's the tool I most know to use, but it could be migrated in a future to KiCAD.
  14. Inductores

    Open-source EUC motherboard

    Yes, it's a GT16 control board. However, once I got the schematics done, I can modify the design and the layout to fit to any EUC, I just need the measurements to fit the components in the board. However, first I need to test it on my EUC and then I need help to develop the firmware.
  15. Inductores

    Open-source EUC motherboard

    Just like I promised, I started with the layout. First I need to import the original layout to my CAD tool in order to trace the copper planes and traces. At this moment, I finished to import the BOTTOM layer: Next step is to import the TOP layer and add different names to all the nets.
  16. I just removed the components of my faulty main board and removed the solder mask: TOP layer BOTTOM layer Well, if you take a closer look to the TOP layer, you can see a big design failure (according to my criteria): Just take a look how close the vias from the VPHASE plane (one motor wire) are from the "GND" plane (well, actually this plane is joined to the GND plane through two 4M0 resistors, you can see it on your own board). I didn't measure the distance between planes, but I consider it's too dangerous for a self-balancing device. As well as this, I also found some non-sense trace layout, like high-voltage traces very close one to another when there is space enough to separate them more, or some "uncompleted" planes, somehow aestethic problems but could be easily modified. I don't know if these failures were solved in the next updates (V2 and V3, my model is a V1), but for me this is a nice way to shortcircuit the board and get an instant cut-off. If these mistakes are also in the new boards, personally I would think twice to buy one of them. In my case I'm going to try to make a proper layout redesign to manufacture a new PCB and mount it to my V1 GT16 (also with new thicker wires).
  17. Inductores

    Strange oscillation in GT16

    Can you please share the link? Thanks!
  18. Inductores

    Open-source EUC motherboard

    Cool! I thought nobody would be interested By the way, I found some interesting info in this repository: https://github.com/EGG-electric-unicycle Two weeks ago I started to remove components from my old Rockwheel board. I will continue with the process this weekend and I will start doing the GT16 schematics from the original layout. Once I had the schematic finished, I think I will need only another weekend to finish the layout (it's a simple 2-layer board, nothing complicated), however I think some components can be replaced or some modules improved (I'll take a look to the DC/DC module).
  19. Hi! I just noticed my GT16's motherboard is burnt, but I'm not sure which components are broken (the MOSFET driver is broken at all, the case just burnt and broke). Before changing components randomly, I would like to know if there is some schematic provided by the manufacturer.
  20. One of the ugliest cases I've ever seen... it's just the old GT16 case but half-cutted and extended (cheaper mould)
  21. Inductores

    German Discussion Group

    See you this Thursday in Berlin! I ride a Ninebot One S2 and will wear a black skate helmet.
  22. Inductores

    How to calculate cost for charging my Ninebot One?

    You also have to consider the charger efficiency and the heat losses. If you assume an efficiency of 80% (probably less than the real one), you have to add 25% to your calculated value (0,8/1 = 1/1,25). So that's 7,5 cents according to your calculations.
  23. Inductores

    German Discussion Group

    Thank you @Torsten Daerr and @Noam for your answers, I hope this new legislation would allow EUC's! Now it's better try not to be in problems
  24. Inductores

    German Discussion Group

    Hello, I'm from Spain but now I'm living in Berlin. Is there anyone here who can explain to me how "legal" is to ride my EUC in Berlin? I usually ride from Rudow to Adlershof. Vielen Dank!
  25. Inductores

    Ninebot One Z8 Open-β Tester's FAQ (link)

    Hi! Can you please share some photos of the internal parts (basically electronic boards)? Thank you!
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