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  1. K

    monster server psu charger ~4kw

    I bought these ages ago to make a charger with but I've had too much to do.... one broken bmsbattery.com charger later and I've pushed these up to the front of the queue 7 x 12v 41amp dell server PSUs 1 x 5v 60amp meanwell (for 24s) plan is to isolate them all, then hook them all up in...
  2. K

    android phone GPS tracker / security system ?

    anyone have any recommendations for an android gps tracker app? I've bought a GPS tracker... but an android phone could be so much better... I just can;t find an app that does what I want/need I'd love to hide an android phone in my frame, and then have it track gps info etc.. then be able to...
  3. K

    pins and needles in hands numbness/pain ?

    anyone else get pins and needles in there hands after a trip on there ebike ? I do 5 miles to work and back (at ~35mph) I noticed the pins and needles straight away but didn't think anything of it... but today when I got home I threw a tennis ball for my dog to fetch and there was a fairly...
  4. K

    where to buy custome frame parts ?

    going to build my own frame anyone know a good website to buy frame parts from ? headtube and tube for the crankset being the main parts I need wide crankset too... bike will be about 150mm wide (6inches) googled, but it's a bit of a mine field, would quite like a site recommended by someone...
  5. K

    bms problem, discharging to 3.36v/cell ?

    my old BMS died, so I replaced it while I was re-configuring my battery pack (24slifepo4, 10ah from bms battery) bought an identical bms to the first one which came with the battery pack had to re-wire all the cell balance wires, and while I was on I connected the controller power directly to...
  6. K

    custom LED rear lights first go/prototype

    couldn't find a decent rear LED bike light, so figured I'd make my own, and then cast it in resin to waterproof it bought a few bits to build a small test one, was only planing to test with a few LEDs but them my HD crashed so I had some time last night while I was re-installing rough plan...
  7. K

    what's the best handle bar camera ?

    after being knocked off by some **** in a parked car who decided to pull out while I was along side him do a U turn right in front of me and knock me off, and then try to blame it all on me, I'm starting to think I should get a handle bar camera... any recommendations ? I'm not that bothered...
  8. K

    series/parralel capacitor pwm charger

    have had this idea at the back of my mind of a while for a balance charger.... if you charge a bunch of capacitors in series from rectified mains voltage and then discharge them into your batteries in parallel with control a bit like pwm (fast switching, guess time could be a constant)...
  9. K

    backwards twist throittle ?

    does anyone have, or has anyone used a throttle which twists in the opposite direction to normal ? at the weekend I powered up a steep hill... it was a hill, then a flat spot, then a hill then flat at the top... I rode up the 1st hill fine, wheelied over the 1st flat, wheelied up the 2nd hill...
  10. K

    battery to battery charger

    I'm about to start building my range extender packs.. and I'm trying to decide the best way to integrate them into my bike and I'm thinking, I'd be better off if I could just plug in my laptop battery pack, and have it charge up my main pack, instead of trying to draw power from them in...
  11. K

    regen with no battery ?

    battery ran flat yesterday.... odd.. it was fully charged and I used to do 12miles without running flat on my modded huatong (big dirty shunt mod) running a 2500watt greentime with my cromotor now probably only did 4 miles before running flat... might just be a co-incidence that this is the...
  12. K

    series parralel pack whole pack ?

    instead of making permanent connections between cells in a diy pack why not use fets between each cell (maybe 1 for regen and 2 or more for normal) when the fets are powered down, you're left with a load of individual cells all balance wires could go to the same plug, and then in the charger...
  13. K

    what about buying a scrambler/dirt bike, and adding pedals ?

    has anyone here bought an off-road motorbike, stripped it down the frame, then added a motor and pedals to use it as a bike ? I'm thinking something like this bike...
  14. K

    hidden wire brake sensor... ?

    anyone used one of these ? http://www.bmsbattery.com/459-hwbs-hidden-wire-brake-sensor.html do they work ? reliable ? etc..? thought I would ask before I buy one and go through the bother of wiring it in etc...
  15. K

    rear lights.... why not use lots of led's in series ?

    I need some decent rear lights for my bike... but can't find any... thinking I might get 20x3.6v flashing red LED's and wire them in series (for my 72v battery) slide them into some clear hear shrink, and then cable tie them to the back of my bike to make me nice and visible... could even...
  16. K

    most powerfull hub motor avalible quick in uk ?

    when the bearings died in my cheap 1kw hub motor, I bought new ones and stripped it down.... noticed the phase wires were very crispy so decided to upgrade them with the 12awg wire I bought ages ago.... but they wouldn't fir through the axle.... so I went tto drill out the other side of the axle...
  17. K

    disk brakes.. what's best ?

    the brakes on my bike are a bit naff... (160mm front and back) the front disk which came with the bike isn't so bad... but the disk kit which came with the rear hub motor kit is pretty bad... adjusting it the best I can... by the time the pads aren't catching the disk there's not enough break...
  18. K

    72v relays for lights/horn

    I need some 72v relays to power my lights/horn... (the handle bar switches are too small) but can't find any... anyone have a link ? (24s so I'm 89v hot off the charger)
  19. K

    balance charge... one cell at a time ?

    this might sound daft... but is it possible to (automatically) balance charge one cell at a time ? if you're bulk charging normally, and just want to balance once in a while to make sure everything is ok.... doing one cell at a time would save money on chargers (especially for people with...
  20. K

    front hub motor... with disk break ?

    I already have a 48v 1000w motor on the back wheel (running 72v) (THIS KIT) (HERE IS THE BIKE) and I'm thinking about getting another motor for the front wheel for 2wd... contacted the same seller so I could get a matching motor... he said $305 delivered for the motor/wheel only (that's all I...
  21. K

    first go and it tried to kill me - NIECE UPDATE !!!

    just built my first ebike 1000w 48v ebay kit 72v10ah battery from bms battery 72v 1500w hua tong controller uaoPzOc6Wgk still needs tidying up a bit, batter waterproofing, going to take the controller apart and remove the extra wires, connect ebreaks, and need a rear break cable because i...
  22. K

    quick check before I buy, and charger advice please

    hi sorry for the noob post, I'm not used to being a noob I'm now to ebikes but have been doing a lot of reading... I'm thinking of buying.... ebay rear wheel kit, 48v 1000watts 72v 1500watt controller 8x Turnigy 14.8v 5000mAh (parallel two lots of 4 in series..... if that sounds ok?) and...
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