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  1. E

    Mid-drive Regen Brainstorming

    This will only work if there isn't a derailleur on the back. Don't forget that the part of the chain that does the driving has to be the lower part for regen as opposed to the upper chain for normal driving.
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    AVOID EUNORAU on Aliexpress

    Well I had a pretty horrible experience with the company, so I wouldn't be buying anything in a hurry from them.
  3. E

    Help me develop the perfect throttle

    A switch in the initial twist region to switch off the stupid Bafang PAS. For those who don't know, the new Bafang mid drives get confused if you pedal with PAS and use the throttle at the same time. A simple normally closed switch could be set up to disable the PAS as soon as a git of...
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    Full suspension mountain bike Friction Drive

    A build like this is definitely in my future! Kepler, I know that you said earlier that you didn't like the idea of a drive off the sidewalls of the tyre, but what you have made is basically a flat belt drive. In industrial applications, V pulleys and belts are dominant. I would suggest that a...
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    AVOID EUNORAU on Aliexpress

    I can agree about this vendor. My controller on a BBSHD lasted a month, then just stopped working. I contacted Eunorau who agreed to send me a new controller if I returned the broken one AT MY EXPENSE! OK bad enough but at least a replacement. However, when I took off the controller, I noticed...
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    em3ev support?

    I have always found their support incredible. Must be a New Year issue.
  7. E

    BBSHD advice before placing order

    If you have a bit of feel for your drive system, a gear sensor is unnecessary. Just back off on the throttle, change gear and then throttle on. If using the PAS, just stop pedaling for a second, change gear and then slowly re-start pedaling.
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    DIY Fix for BBS02/BBSHD Pedal/Throttle Issue

    I see that the Domino throttle has a micro switch built in. Couldn't this be used to switch off the PAS as soon as the throttle is activated?
  9. E

    Specialized Mid drive

    Could you post a picture of the bike without the cover on? I want to modify this exact same bike!
  10. E

    Specialized Mid drive

    Fantastic looking battery housing! Did you make a mould?
  11. E

    14S battery @57.4 V or 15S @ 60V ?

    I don't understand your question? Whatever I do, I will use 3 parallel strings, so 14S 3P at 4.05 V per cell or 15S 3P at 4.0 V per cell Which will hold more energy? I may actually have to hold the 15S at 3.95V to ensure that I am below the magic 60V to not damage my BBSHD controller. So...
  12. E

    14S battery @57.4 V or 15S @ 60V ?

    Well the question still remains... Will 14S charged at 4.05V per cell hold or or less power than 15S charged at 4V per cell ?
  13. E

    14S battery @57.4 V or 15S @ 60V ?

    I am planning to build the pack myself, so I can build whatever I want. Your comment in italics above is incorrect. You obviously meant to say 14S at 4.2 = 58.8V but I get your meaning. I was just wondering if I had to charge to 3.92V @15S (still sticking to 58.8V), whether I could get a...
  14. E

    14S battery @57.4 V or 15S @ 60V ?

    I can only charge to 4.0 V if I want to stick to the standard Bafang controller. 60 Volts max. I don't understand what you mean by "The balancing shunts" ? Are there settings on the BMS for these? I only see that one can set the Overcharge Protection - 4.2V~4.35V(Adjustable), Over discharge...
  15. E

    14S battery @57.4 V or 15S @ 60V ?

    I can't find this? One of the Best tech that find is: http://bestechpower.com/555v15spcmbmspcbforli-ionli-polymerbatterypack/PCB-D167.html This has a Over charge detection voltage of between 4.2V~4.35V(Adjustable) and Over charge release voltage of between 4.0 - 4.2 (Adjustable). Wouldn't...
  16. E

    14S battery @57.4 V or 15S @ 60V ?

    I want to build a 18650 battery for my downhill bike with a Bafang BBSHD motor, using Samsung 30Q batteries. I don't want to fiddle with the controller capacitors, so I need to stick to just under 60 volts. Will I achieve anything by running a 15S at just below 60V fully charged (cell voltages...
  17. E

    14S battery @57.4 V or 15S @ 60V ?

    OK so 3P it is! Now i just need to decide about 14 or 15S?
  18. E

    14S battery @57.4 V or 15S @ 60V ?

    I see now that Luna offer a Mighty Mini battery with the 30Q rated at 6 Ahr, so 14S2P. They say that one can draw 30 A. https://lunacycle.com/batteries/packs/52v/52v-mighty-mini-cube-samsung-ebike-battery-pack-30q-6ah-3-pounds/ Regarding the 15S, I suppose I could top up to 4.2 v sometimes to...
  19. E

    14S battery @57.4 V or 15S @ 60V ?

    I want to build a 18650 battery for my downhill bike with a Bafang BBSHD motor, using Samsung 30Q batteries. I don't want to fiddle with the controller capacitors, so I need to stick to just under 60 volts. I pedal the bike a lot and only use the motor for short bursts with the throttle (30 amps...
  20. E

    DIY Fix for BBS02/BBSHD Pedal/Throttle Issue

    Thanks to all concerned for the fix!
  21. E

    Throttle Behavior

    Sorry to digress, but the pot is supposed to go in series into the negative supply to the throttle?
  22. E

    Throttle Behavior

    Are we even sure that the problem is coming from the Controller? Couldn't it be coming from the PAS board?
  23. E

    Throttle Behavior

    I have Bluetooth pressure sensors on my car tyres. Continuously send pressure and temperature to a monitor. Perhaps you can use this?
  24. E

    Throttle Behavior

    That is exactly what I am proposing, but I have no idea how to implement this!
  25. E

    Throttle Behavior

    I have been thinking about the problem and have done a few experiments: If I start off pedaling, and then add a bit of throttle, nothing happens until I get the throttle to a point where the throttle input is higher than what the PAS level is. Then the throttle kicks in , but it seems undecided...
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