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  1. Tony

    Dewalt A123 BMS battery interface solution

    * Report this post * Reply with quote Re: Dewalt A123 BMS battery interface solution Postby kfong » Sat Jun 20, 2009 10:02 am I did some more testing with the boards. Looks like capacitive spikes are a problem. It will shut down the BMS, an inline inductor of 300uh and a diode across the...
  2. Tony

    Dewalt A123 BMS battery interface solution

    I'm going to be using the Dewalt 28v packs with your boards, would the same resistors and diode be used as the 36v pack?
  3. Tony

    Problem with BMC hub motor

    Take an afternoon and check every one of the 36 different combinations http://endless-sphere.com/forums/viewtopic.php?f=16&t=3484- use a 5 amp fuse and wire a light bulb up in between the battery and controller so you don't fry the controller.
  4. Tony

    Troubleshooting bad BMC motor?

    I've been searching the forums for info on checking to see if my BMC hub motor is bad vs. my controller or if both are possibley bad but can't seem to find the topic. I see mention of using a 9volt battery drained to 5volts to check the halls but can't find the specific post on how. I have a...
  5. Tony

    BMC 35a Controller Wiring.

    yes, I've tried that combo with no luck- as well as the wiring that came with the instructions. I have a n older hub from 2005. ? if this is diffrent than the current ones as far as the wiring. I'm using a crystalte throttle with red on throttle to red on controller, yellow to black, and green...
  6. Tony

    BMC 35a Controller Wiring.

    Does anyone know the correct wiring for a front BMC motor with this controller? I've tried quite a few combos and it isn't working 100% right. Matching up color to color does not work. Thanks.
  7. Tony

    crystalyte 35a 36-72v controller keeps popping fuse

    Ok I've ordered some of those IRFB4110s from china, yea I'm cheap- but what the heck if it works it works. Still in the process of de soldering. Will keep updating....
  8. Tony

    crystalyte 35a 36-72v controller keeps popping fuse

    [img]Thanks Knoxie for the heads up on the gate resistors. I have been studying Fechers tutorial- am I correct in assuming there are 12 gate resistors- one for each FET? CR2,CR3, CR5, CR6 / BR2 BR3 BR5 BR6/ AR2 AR3 Ar5 AR6. If so they all read 11 ohms except the "CRs" which read 0. So I will...
  9. Tony

    crystalyte 35a 36-72v controller keeps popping fuse

    Yes they are 4710's- thanks for the reassurance. I've started pulling out the old fets. Looks like this is going to be a tedious job. I'll do a little at a time - mabye I'll be done by the end of summer :lol:
  10. Tony

    crystalyte 35a 36-72v controller keeps popping fuse

    OK , I'm wondering if this will be worth upgrading the FETS. I beleive they may be blown- per Fechers guide - I only have 1 ohm of resistance from pos lead to green and blue and no continuity(signal) at all from pos to yellow. Same holds true for negative side. I took it apart and tested the...
  11. Tony

    crystalyte 35a 36-72v controller keeps popping fuse

    I made the mistake of lightly feathering the throttle at standstill when testing the controller at 72 volts (it was working great before at 72v) and the battery fuse totally melted in a serious fashion. I wired in a new 40 amp fuse but now as soon as I turn the controller on the fuse blows...
  12. Tony

    Solderless A123 pack construction

    Been reserching pack construction in the RC forums and ran across this, though it was worth passing on. http://www.modelelectronicscorp.com/browse_product.php?pid=29
  13. Tony

    first test ride on BMC hub motor

    Q, You simply can't go wrong with the EV tech kit. Yes, it's more expensive than the other options -but in this case you do get what you pay for. I haven't looked at the ev tech site in a long while but when I checked their site recently the kit comes with a 25amp controller which should be a...
  14. Tony

    first test ride on BMC hub motor

    Quino, no problems at all with the fork. Of course it is a steel fork- very strong- I feel very safe even with 2000 watts running through it. ( I do have tourque arms fitted tightly to both sides for peace of mind- the laser cut ones that came with the motor) I haven't had one sign of slippage...
  15. Tony

    Duct Tape E-Bay Lifepo4s???

    I wonder how much extra the "crust" would be LOL. I must have one with the crust. Best choice of 48V electric bike,very cheap price with long life,and light weight,suit ride within 100KM. Notes:This batteries no including the crust,it can instead of the plumbum acid batteries directly,can use...
  16. Tony

    first test ride on BMC hub motor

    Oh yes- I did upgrade this past summer to a 48v 35a controller and am very pleased with the combo- very strong.
  17. Tony

    Smaller motor

    Since you have a crystalyte controller I would go with the Puma. But I don't think you'll be saving yourself THAT much weight in the end over the 408. , I haven't weighed them but the puma feels about 3 lbs or so lighter than my 407. Of course, if your looking for power the puma cannot be beat...
  18. Tony

    Need ebike recommendations for mountain logging road use

    before you give up on the electric- you could get a 400 series crystalyte and lace it to a 20 inch wheel which would provide good torque , check out this bike for reference. http://www.austinev.org/evalbum/744
  19. Tony

    Need ebike recommendations for mountain logging road use

    Its only geared on the outside with sprockets- from what I understand these bikes are favorable for thier torque with the MAC brushless motor- (I've never driven one ) so you may want to find a review on that bike to be sure. Just seemed like a good idea because of the price. If you like to...
  20. Tony

    Need ebike recommendations for mountain logging road use

    The reason I like the lash out/electrec for your situation is the gearing- seeing that hills are a major concern- and it's a "ready to go" bike with dual suspention- no searching around for a bike and then fitting a kit to it- sure it's not going to be a 30mph powerhorse (thats the downside). I...
  21. Tony

    Need ebike recommendations for mountain logging road use

    I would keep it simple. Try the rear puma- if your willing to pedal the stock 15 amp controller will get you up hill easily with minimal sweat at 37 volts. I'm running the puma with the 35 amp and 48 volts and can make it up just about any hill in reason without pedaling. With the 15 amp...
  22. Tony

    post your 0-100 feet acceleration time

    Finally upgraded to the crystalyte 35a controller. Seems to have a "soft start" compared to the stock 15a controller. But I did shave about a second off my time to 6.1 seconds. With this set up the midrange torque is great! Its just starting to pull hard at the 100 ft mark.
  23. Tony

    Tires & Rims

    I just put these on my bike a few weeks ago. Iv'e got a standard 26" mountain bike rim, measured my rim at a tad over 1" so you should be fine. Bit tough to put on you"ll need some stiff tire levers for sure. You"ll also need bigger tubes because these tires are HUGE. I did notice the extra...
  24. Tony

    Can't get new crystalye 35a controller to work.

    Ok, I hooked the old controller up and spiced in the new throttle (correctly this time)- and everything works well. Soooo theres got to be somthing up with the crystalyte controller- I've gone through Fetchers troubleshooting thread and everything checks out good- so I must have fried the PWM...
  25. Tony

    Standing start 0-75km/h on a 4.25% grade

    Almost sounds like there is a motorcycle there- I was waiting for it to pass you- but it never does!
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