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  1. danielrlee

    Problem measuring shunt resistance w/constant current

    Hi I recently attempted to measure the shunt resistance of a Grinfinneon controller by passing a known current through the shunt and measuring the voltage drop (as per the CAv3 guide), but have so far been unsuccessful. I used the following CC/CV DC-DC boost converter to supply the current...
  2. danielrlee

    Repairing silicone wire insulation

    Does anybody have any tips on how to repair silicone wire insulation where there isn't any room to heatshrink or tape? As in the below example where the wire insulation is starting to split, I would like to prevent any further damage. I usually use clear nail varnish to add insulation where no...
  3. danielrlee

    Long distance journey: Go faster or ride more efficiently?

    Does anybody know of a formula to work out the above, based on a fixed distance, battery capacity and charging capability? I know there are other variables involved, but it would be handy to roughly work out the ideal speed for journeys too far on just a single charge.
  4. danielrlee

    Combining chargers in parallel

    I'm trying to combine two chargers in parallel and am experiencing some strange behaviour. The first charger is actually a pair of Meanwell HLG-240H-48As, permanently paralleled, each set to 49.8V (12S lipo @ 4.15V/cell), running at their maximum amperage of 10A (5A per supply). Using them like...
  5. danielrlee

    Troubleshooting remote start w/GPS tracker/alarm

    I have been using a GPS tracker/alarm on one of my builds for a couple of years now, but recently decided to further integrate it into the bike by utilising the remote start functionality. Having routed the relevant pin (switched V+) to the controller MCU feed, with excitement, I engaged remote...
  6. danielrlee

    Adapting a double legged kickstand - Help

    My current implementation of a double-legged kickstand is far from perfect: The kickstand itself is sturdy enough, but is too short for the chunky tyres on this bike. I've used a block of wood to provide a little more length, but it's not a pretty solution. I could just paint it, but it also...
  7. danielrlee

    Brushless Controller Diagnosis & Repair

    I thought I'd try my hand at diagnosing and repairing an old 6-FET sensorless controller that sort of crapped out on me a couple of years ago when it started juddering under load. I've tested the FETs as instructed by the Grin controller diagnosis guide and none of them are obviously faulty from...
  8. danielrlee

    JST-SM Crimp Tool

    Can anyone reconmend a crimping tool for JST-SM connectors, for around the £10 mark? There are a bewildering array of dies and sizes and none at a sane price point actually specify for the SM type solderless terminal. How exactly do manufacturers of 'official' crimp tools justify triple digit...
  9. danielrlee

    Grinfineon controller error code query

    I'm probably worrying about nothing, but following a minor modification to my Grinfineon controller today (fitting an external switch), I have noticed a sequence of LED flashes that I don't previously recall. When I turn on the controller the sequence is as follows: 2 quick flashes, 3 quick...
  10. danielrlee

    Adding a key switch to Grinfineon controller / CAv3

    I want to add remote switching to my Grinfineon / CAv3 setup using an additional GPS/alarm device. The alarm provides means to switch pack voltage via a dedicated pin, but the Grinfineon controller does not feature a key switch wire as with all other controllers I have used previously. I figure...
  11. danielrlee

    Overcurrent protection - Inputs only, or each individual out

    I'm in the process of cleaning up the wiring of my newest build and I've been wondering on best practice for overcurrent protection. Is it enough to fuse power supply inputs only, or should each output have its own fuse? I have always previously chosen to just fuse each battery pack accordingly...
  12. danielrlee

    Kona Blast Build Thread

    I've been thinking about a second build for ages and after a lengthy search for a suitable bike, I finally bagged myself a used 2010 Kona Blast at a reasonable price on ebay. I'm looking forward to getting on with the build and getting everything ordered. After a fantastic couple of years...
  13. danielrlee

    Carrera Kraken 18" + EM3EV Bag: Will it fit?

    Just a quickie.... I'm trying to find a bike in which I plan to fit a Crystallite kit from Grin Cyclery and I was wondering if anyone can confirm that an EM3EV triangle bag will fit in an 18" Carrera Kraken. Thanks.
  14. danielrlee

    Opportunity Charging in the UK

    Recently, I have been thinking about longer distance e-bike travel and some of the issues involved - the biggest being that of charging while on the road. As far as I can tell from my research, In North America it seems like you can't go five miles without stumbling upon a power outlet from...
  15. danielrlee

    Storing electric bikes outdoors

    Hi All. My girlfriend and I are preparing for the arrival of a little'un in the spring and am slowly making the necessary changes to accommodate a little person in our existing two-bedroom house. A couple of weeks ago I moved my home office from the spare bedroom to a space downstairs and now...
  16. danielrlee

    Hobbyking Multistar High Capacity Lipo

    A friend of mine just spotted these on the hobbyking website: http://www.hobbyking.com/hobbyking/store/__1387__85__Batteries_Accessories-MultiStar.html?utm_campaign=160714.UK&utm_content=2906338329&utm_medium=email&utm_source=EDM From what I can see, they are about 40 percent smaller than...
  17. danielrlee

    Bafang SWX Metal Filings

    Hi. I have been running a Bafang SWX way past spec (1150W) for over a couple of years with what I regard as 'manageable issues' and only a handful of peanut butter gears. While out for a ride yesterday I experienced a totally new set of noises and problems. After a fairly short (400m) but steep...
  18. danielrlee

    Remote control power switch

    I have recently been looking into ways to implement remote power switching into my electric bike. Browsing through ebay listings, I came across these and wondered if either would be suitable. They appear to be based on the same relay, but differ in board design...
  19. danielrlee

    Availability of electric bike parts in the UK

    Over the last few months I have come to realise that there is a distinct lack of UK suppliers when it comes to many electric bike parts and accessories. When I have tried to source certain parts, the only option has been to ship from China, or if I am lucky, the US. Along with this comes the...
  20. danielrlee

    My thoughts on triangle mounted battery

    I have recently switched from running 6.3kg of lipo on a rear rack to a triangle bag and am absolutely blown away by the difference it makes to the whole experience of riding the bike. It's certainly the best change I have made to my build since upgrading from SLA to lipo at the beginning of the...
  21. danielrlee

    Advice to help avoid destroying my geared motor

    I have had a string of Bafang gear failures in recent weeks (see http://endless-sphere.com/forums/viewtopic.php?t=52478 for details) and I'm starting to think that the manner in which I ride has something to with it. I own just one bike which I use both as a commuter on potholed London roads...
  22. danielrlee

    Effieciency of speed limited controller

    When a brushless hub controller is limited by connecting the white speed limiting jumper wires, does the efficiency curve of the motor move proportionally with the new lower top speed?
  23. danielrlee

    Effects of controller heat buildup?

    This may be a silly question, but does a controller running at a higher temperature (as in insufficiently cooled), have any negative effects on performance or efficiency?
  24. danielrlee

    Throttle Trim Mod Problem

    It has bugged me for ages that my throttle does nothing for the first 40% of its range. This evening, I wired a 1k potentiometer inline with throttle GND to enable me to trim the throttle to make use of the whole range of the throttle twist. This did exactly what was needed; provide a sensitive...
  25. danielrlee

    Stripped Bafang 8FUN Planetary Gear

    Hi all. During my morning commute today, my rear wheel hub motor developed a clicking noise. Upon inspection, it appears that I have stripped a couple of teeth from one of the planetary gears. Two questions: 1) Does anyone know where I can get a set of replacement planetary gears? A UK...
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