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  1. D

    weird motor issue at higher speeds modified dyu d1

    Hi guys, been on a hiatus with internet forums since I got told to tig weld something mundane on a MIG welding forum... Anyhow, since I snapped my 2wd ebike in half doing some urban moto x I found I hardly use my sensible dyu d1 as it feels SO slow now and I use my car instead. So having...
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    Balance lead, 5 wires on a 6s pack?

    So i buy a electric skateboard and it needs a new battery, 6 groups of 4 18650s and measures 24v ish. The connector for the balance leads has 4 red wires a black wire and 2 blue wires which both are epoxied into a temperature probe. I want to use my rc 6s 5ah lipo bricks but they have 7 wire...
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    Can anyone help or suggest what these controller wires do?

    So i bougbt an infineon type motor contoller with wheel and twist throttle off ebay and to my relief it works. However im curious what the unused wires are for. I know the b.g.y wires for motor power b.r contoller power the cycle analyst plug is there (r.black. blue.w.y.g) the throttle is hard...
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    where can i find wiring diagram for infineon irfb4110

    Well about 4 years ago i was ready to build an ebike then some things beat my bank acc and it never happened. a few weeks ago i found a hub motor and controller on ebay and being half able to afford it, i took the plunge. Anyhow the controller has no markings on it but the seller believes it...
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    anyone know what accuracy kart sprockets are made to?

    ive got time to research and ponder things while i try and save up again for my ebike mid build. I realised if i use a kart 105t to a 7t drive sprocket on a 219 chain then i dont need a second set of sprockets for further gear reduction. The problem is i cant find anything like a 7t for 219...
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    Any opinions on this chinese pack?

    so i decided i need 72v and 10ah for my bike, lo and behold i find this: http://www.lifepo4.in/72v10ah-.html it looks a bit good to be true, but i need the pack balancer and charger. what do you guys think? i know chinese = risky.
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    noobish charger, battery question

    i plan on building a 70v pack from a123-m1's and will pull upto 35A from it. im unsure if the hyperion eos series chargers would be suitable as the a123's only charge to about 3.3v. also i would have to rig a pair of packs, 1 of 10cells and 1 of 11cells to parrallel to suit the charger? i havent...
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    whats the ultimate bms & charger for a 72v a123m1 pack

    as the title, i have spent a good few hours reading es today, but not really significantly wiser on this. im at the point where im ready to start ordering ingredients, so advice on off the shelf stuff would be good. i can do some basic soldering and assembly but assembling pcb's is out of my and...
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    best cheapest 72v 30a brushed motor controller

    as the title, i dont have loads of cash but as spring is in sight i need to get a move on with my bike. basically im after the best value controller with those specs. cheap and reliable is good, but every time i suggest a controller here or elsewhere people tell me its not the best because...
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    how do simple mains inverters work? modifiable?

    hi guys, im trying to build an ebike on a tramps petty cash. so far i have an universal motor, a bike and a 12/24vdc to 240vac (im in the uk) mains adapter sitting looking anxious in the corner. the motor is rated 240v 50hz 2000w. i do have basic 12v auto experience and am reasonably competent...
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    which controller parts to change for higher voltage & amps

    having decided im too poor to buy a proper ebike setup for now i want to find a controller to run a 2000w universal motor i found on ebay for $16. im thinking a basic pwm controller (anyone reccomend one?) and replace/add more fets and main capacitor. would i need to replace any other parts to...
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    crystalyte uk for realistic prices

    so i spend 18 months learning about ebikes and anything remotely related in the little spare time i get, decide to just price up clyte 5302 a 40a irfb4110 controller and a cycle anylist. can i get any info on a uk dealer, other than some bloke in his garage, no. so i try europe and everthing...
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    a way to reduce cogging?

    when i first became interested in ebikes and thought making/adapting my own motor might be possible i came across the backshed site (beyond random i know). i just remembered the bit on cogging and thought of direct drive hub motors. im pretty sure any reducuction in cogging would be at least...
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    how lightweight do you need your bike to be?

    ive had a lot of spare time this week (off sick) and found some interesting stuff. i dont have much opinion on this and cant vouch for its acuracy but its definately thought provoking if you ride lots of hills and the principle is sound: http://www.smartcycles.com/bike_weight.htm
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    motor and or controller cooling idea

    hi guys ive been lurking for a while now as i love ebikes and want to build myself one as i have half the ingedients and understanding i need, just not time* or cash atm. im interested by most stuff with with wheels and read whiplash' post about motor cooling...
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