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About Cychotic

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  • EUC
    Inmotion V10

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  1. I still haven't had a chance to install it yet. But the tire that StuartL linked looks identical to mine in the picture. Except mine says is branded as "Qind" instead. Still update soon.
  2. Tire came in. It looks smaller since it's 2.4" instead of 2.5".
  3. Anyone tried knobby tire for the V10? Kuji's test of street vs knobby tire on the Sherman and he stated that the knobby tire has more stability. I am curious if this would apply to the V10 with the below knobby tire. https://www.monsterscooterparts.com/16ramxtionfr.html?gclid=Cj0KCQjwgo_5BRDuARIsADDEntQ4aVuz7xPueyirAzRaWfW-mM3t0EwrvRP3ChZtyHcVHAUwREzZ0sgaAi8vEALw_wcB
  4. Edit: Nevermind, found your schematic. I will give some feed back.
  5. C is superior in terms of optimization. Lowest level you should ever program in. You can use high level programming fundamentals in C as well, it just takes more work and better architecture. You can do parallel task similar to RTOS, again it's just takes more effort. Obviously RTOS is going to be more "parallel." But from my experience, there are very few applications that truly requires it. A WELL constructed super loop with proper prioritization and many state machines. You achieve less overhead and superior speed and reliability. There is also Protothread if you find it to be more convenient to use, but you don't need really need it, since the fundamentals are the same. Yes it is 21th century, with the exception of C++ (which you end up writing mostly C), but there simply isn't a high level language that can compete with C in terms of performance for microcontrollers.
  6. The idea that the Chinese can't produce quality is outdated for about 10 years. It's a matter of how much you are willing to pay. Most buying from China expects the cheapest. However, the culture is very different from the west. But there are pros and cons to both sides. I don't want to turn this into a debate, but underestimating the Chinese will be the reason why they will continue to prevail. Anyways, I am an EE. If anyone want to collaborate on creating an open source controller, I would be happy to join the effort. I can do the entire design by myself, but I don't necessarily have the time as I have a day job and a family with young kids. So a collaboration would be fun whenever I get some spare time.
  7. EUC is definitely more cyber punk than mall cop. If anyone think EUC is dorky, show them a video of someone like Chooch Tech ripping through the trails. Their minds will most likely be blown.
  8. This makes me want to see if it's possible to put a 16x3" tire on my V10. Nice mod!
  9. I am in Sugar Land area. I am fairly new at riding as well.
  10. With current technology, that's pretty much true in my opinion. If you design more sensors in the pedals, you can use that info to aid balancing against the surface by detecting rider's position and what type of force applied. You would need both downward force and also torque of the riders foot. Is the riding applying force on its toes or heels and how much? How precise will the sensor be? How fast does it have to respond? It is still a very challenging problem. Response time would be the most challenging aspect of making it work. In general the wheel is trying to filter out noise (bumps) which slows down the response time to achieve smooth ride. And in the case of banking a surface, it's the opposite, you have to react to the curvature as fast as possible So we can't do both at the same time. Perhaps create a hybrid control approach where rider can use an handheld controller to tell the EUC to spin faster, slower, or hold constant? This would be consist of a trigger to activate the override and lock in the current speed of the motor, then a joystick or something to increase or decrease speed. This would take tremendous amount of human skills to master, but it's possible with training. It would be the easiest to implement. And also as I mentioned earlier cameras and imagine processing. Essentially, if you have all the technologies required to make a semi-autonomous EUC where it has to understand it's path, it is definitely possible. Any multi-millionaires or billionaires want to fund the project?
  11. You would achieve that if we can also measure how much force is applied to the pedals or axle. Combine that with existing accelerometer, it is definitely a step forward. I hope I didn't misunderstood your idea.
  12. Yea, I think you could put sensors in the pedal or axel to measure the force applied. That's definitely a possible solution. But what we currently have in our wheel is not sufficient. It will only work in a very limited scenarios.
  13. Continue on my above post, I think you can make it work using the extra downward acceleration (relative to the wheel) while the wheel is on an angle, but my gut feeling tells me that the wheel will have severe pedal dip during the turn and would need more sensors to make it work well. I imagine it will have so many corner cases where it won't work. You almost have to preprocess the path inorder to properly compensate smoothly. A person on a mechanical unicycle can do this obviously because he can visually see the curve and are anticipating it. You simply cannot do that blind folded on an unknown curve.
  14. Mrelwood is absolutely correct. The only way to make a EUC not cutoff at an extreme angle is to use historical data to calculate that the wheel is in fact "banking" in a turn. Also the geometry of that curve has to be known! And at that point you no longer rely just on relatively instantaneous data. There is no way for the wheel to detect the curvature of the surface to compensate for the "upright" position relative to the SURFACE. You cannot sense the curvature of a surface using an accelerometer. How do you think bicycle bank on a turn? Because it has two wheels, and the two wheels combined IS the surface curvature detector! For an EUC to make this work, it requires a camera and live image processing.
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