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    Joshuasyafa's collected wisdom

    those are huge... definitely not meant for a normal bike... more like for motorbikes xD
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    What is 2022's best controller?

    I think, the chances a controller breaks are high, this is why I hesitate to buy a really expensive one like ASI or Phaserunner or something like that... I had plenty KT controllers, they are fine, but they have no FOC, and only up to 13S. Also the 6 fets one is only good to 1000w or something...
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    What is 2022's best controller?

    I am surprised nobody mentioned VESC, now that they have native support for Pas, for me it is the way to go. Check Flipsky 75100
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    I bought them in a Taobao agent... lets see... Does anyone know the big SMD capacitor value right on top? I have also fried it.
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    But the UART has a 5V line as well right? Thanks for your support. Do you know where to buy a good PAS that works? I am having some problems finding one actually. It is not clear to me by reading the PR in GitHub if 3 pin PAS will work on 5.3. I guess it is better to just find one quadratic one.
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    FLIPSKY new 20s 100A tiny controller (vesc based)

    has anyone tried this with a normal 5V PAS ? how are you suppose to connect it to the controller? Also, I am wondering, what screen options exist? How do you adjust the power, and turn it on etc? sorry if it sounds a bit noob, but these VESC controllers always confused me... I am still however...
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    Puma CST or Banfang CST for KT controller?

    Thanks guys, I decided to queue up for a Nucular 6F controller, and a Puma/Mac 8T. I will try to fix the q128c in the future and use it in another setup, thanks a lot for the suggestions. It actually surprised me this thing with the q128c, I have two q100h pulling 1000w and they keep up strong...
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    Active pre-charge/inrush control

    I have made the layout smaller, and put both negatives to one side and holes for 8awg. Size: 51.8 x 23.2 mm, smaller than this with 6 fets... and heatsink.... gets complicated. In between the mosfet, there is enough gap to put a screw, since I am planning with a small plate to press the...
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    Active pre-charge/inrush control

    thanks man, will try to squeeze an 8awg, and make those holes with pads slightly bigger. The current to the gates and Zener is minimal right? I mean, less than 1mA probably right?
  10. L

    Active pre-charge/inrush control

    6mm2 = 10awg. I think it should be fine right? Length is not going to be much (it is for a rc boat). Would you use thicker cable?
  11. L

    Active pre-charge/inrush control

    drains an sources traces (60mil now), I was thinking to reinforce them with 10-12awg cable afterwards. Rest (15mil) I think are ok right? what do you think?
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    Active pre-charge/inrush control

    I am designing a PCB for 6 mosfet version, from 3b version from fetcher. Here comes the board: What do you think? In between the mosfet, I left the perfect space for this heatsink (40x25mm version): https://www.aliexpress.com/item/4001107677711.html?spm=a2g0s.9042311.0.0.5d4d4c4d1fNezv The...
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    Sur-Ron Battery upgrade

    guys, what is the preferred dashboard interface for this controller? eggrider, apt, or ca v3? Thank you!
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    Puma CST or Banfang CST for KT controller?

    My q128c (9rpm/v) mounted in a folding bike with 20 inches wheel is trashed. It just stopped running and it is making strange mechanical noises even unplugged. I was powering it with a KT controller that I adapted for 52V/20A (14S battery). It did not last long, maybe 1000-2000km.... So I am...
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    Best 21700 downtube case?

    I am looking for a downtube battery case to host my new 13s3p pack (with Samsung 40T 21700 cells). So far, Nick from Reention told me of a new model 4C-21700, but I can't find it anywhere. Also I know there is another one from Hailong, but to be honest they look a bit too plastic and shit, am I...
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    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    For the sake of documentation. I did this with one Pswpower from 2014 or so, but blew up my controller. I failed to determine the reason. But I did the same now with a pswpower from 2018 late, and the design is very much changed. All caps except one is ok for up to 63v. I just changed one next...
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    Passion eBike 6 FET Kunteng Controller (S06S)

    why would you need 100v mosfets for 14S? 80V should be fine right? Same for caps, why 100V? 63V should be enough. Right?
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    New project. Q128c, folding bike.

    I am converting one folding bike 20 inches that I have around here for a relative. I am planning to use a <150mm motor, I think the q128c 328rpm 36V would be a good choice. I can overvolt it to 48V, or perhaps better at 52V? I aim for 40kph loaded. My other option is a Mxus XF15R 440rpm at...
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    wye/delta switch on q100h?

    I am powering a q100h 260rpm (on the front) with 48v and 20amps with a Kuteng controller. Already for several years, running fine. I am achieving a top speed of around 40km/h on 700c wheels. I see that, at that speed the wattage drops down to 400-500W (from around 700-800W), due to the battery...
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    Project Interceptor, oil cooled Q100H@55V, in-frame battery

    What is your top speed with load on the 72v one?
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    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    Which motor do you have? I am just curious why my assumptions are wrong? I know the efficiency would be crap and that I would have to keep an eye on the motor temperature or try to cool it with oil or something. But apart from that? Have you guys implemented field weakening?
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    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    So, do you think my assumptions are right? Do you think with this system, I could increase my top speed? Right now it is topping at around 40km/h. But at this point I am only using 400w or so. If at this point I press a switch to connect another battery module to increase the voltage to 72V for...
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    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    Ey guys, may I ask you something I was wondering myself: I have a q100h with this controller and a simple PAS. I understand that this works like on/off, with a variable current (depending on your assistance level). I was thinking how to get higher top speed on my setup. The top speed is...
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    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    I guys do not have so much spare time :S sorry. I need a VM to compile your stuff, learn how to flash it etc. I will do, but dont expect it in less than 2 weeks-4weeks. Sorry :S
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    KT LCD3 firmware -- Flexible OpenSource firmware for Kunteng KT-LCD3

    I am missing a hidden way to make the bike fully legal in Europe. Some sort of password like going to pas level 1 then to 3 and back to 1, or something like that. Then the speed would be limited to 25 and power to 250w. LCD related maybe would be useful to display and estimated range for the...
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