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  1. S

    New Super-Junction MOSFETs

    http://www.mouser.com/fairchildsupreMOS/?cm_mmc=Email-_-April2012-_-Industrial-Newsletter-_-FairchildImg The specs and price are both incredible.
  2. S

    Simplest BMS

    Can someone help me building a very simple BMS? I'm looking for a balancing solution, that can be connected to a 10AH battery pack for at least 2months without discharging it completely. If the battery is balanced with each charge, the voltage differences will be small and LVC / HVC for the...
  3. S

    Modding the 9c to get more space for disc brakes

    This must have been discussed before, but I just can't find it! What are the options to get more space for disc brakes on the nine continent motors? One for sure is putting washers or some kind of spacers to displace the disc. This is however limited by the width of the frame. If I were...
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    Funny idea for the CA

    I couldn't sleep and came up with the following: Dynamically adjustable current limit to reach a preset distance. I don't have my own eBike yet, but I imagine the tendency is to go WOT all the way. On the other hand, the energy required grows exponentially with speed. Therefore for more or...
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    BMS design help needed

    My intention is to make an Arduino driven BMS. This is for a 24s LiPo pack. The idea is to use a multiplexer to turn on a solid state relay at each cell connected in series with a resistor and an analog optocoupler (in parallel). It should work by checking the voltages once every minute...
  6. S

    Bottom bracket torque sensor

    I'm about finished with the design phase of my e-bike project, but I'm missing an important part a bottom bracket torque sensor. From these links it's clear they exist, but I'm having a difficult time searching where to buy one...
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    Charging Lipo with unstabilised power supply

    I'm trying to make a portable power supply for my ebike. The design is very simplistic. My question is: Will a Lipo battery have problems with the following unstable current? I know it doesn't look good, but maybe since the peak current is 20A (Channel A) and the maximum charging current...
  8. S

    No need to connect and disconnect packs between charging and

    Hi, I'm pretty new here so this surely has been covered, but I'm unable to find it. Considering we have two battery packs 48V each with BMS and one charger 48V, but want to use them connected in series on the bike (96V), is there a way to go around switching between parallel for charging and...
  9. S

    Commuter build

    Hi guys, I've read a lot of posts here on the forum and while very educating most seem to be directed at the fastest, most powerful, fattest e-bike one can get. It might be my noobieness or maybe I'm just getting old, but I'm simply looking for the most efficient, cheap and inconspicuous...
  10. S

    Two modes on one controler selected by a switch

    Hi, I'm pretty new here, so I hope I'm not asking something that has been solved before. I live in Europe and the law here states that the maximum continuous power rating for a ebike motor is 250W. Plus the maximum assisted speed is 25km/h and it must be pedal assist. Now I understand the...
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