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  1. mwkeefer

    BBS02 Cake -- FS mid-drive build, v2

    Hello, Depending on the weight and wind resistance (mostly), combined with rolling resistance (minimal in most cases) the BBS02 750 can be geared for up to 30-35 mph but even geared for 35 mph using 48v @ 25a you will only see 88% of that (efficiency) which would be roughly max road speed of...
  2. mwkeefer

    LightningRods mid drive kit

    Hey guys, Is there a way to archive an entire thread with all pages in a single page on this php forum? I ask because as threads reach 50-100 pages they become very difficult to do a thread search or archive the thread for propesperity and to make sure its information is always available...
  3. mwkeefer

    "PVC pipe" lipo battery case build

    May I say this is one of the nicest Downtube style PVC 4x4 based enclosures I've seen so far, great work on all! -Mike
  4. mwkeefer

    new barfang kit Lcd dead.

    I have low cost USB->TTL adapters which work great with ControllerST software used to udpate the settings on the bafang controller (and most other with proper adapter you can make all yourself. -Mike
  5. mwkeefer

    new barfang kit Lcd dead.

    If the bafang was unplugged from power the caps may have held enough charge that the differental in voltage prevented the spark (rapid equalization of voltage). Sadly I have not yet figured out the CA plug wiring, someone may have. Worst case scenario, I should have a C961 LCD and one other...
  6. mwkeefer

    Best RC motor for lightweight utility bike build

    Not sure if your looking for an Astro 3210 or 3220 but I have both and a Black Recumpence MS-eDrive complete setup. I even have an HV 120 ICE for the setup - The reduction of the v4 is 4:1 but the slipper clutch makes all the different. Geared properly (say 37mph theoretical top speed) you...
  7. mwkeefer

    New Bafang Crank-Drives

    No you just need to have the Controller ST and copy corresponding to your setup however don't write if your not sure... v4 is for v4 drive and don't hate the US vendors most aren't hip to this either, not their faults... just a backlog of the v2 and v3 units lower volume vendors have been...
  8. mwkeefer

    New Bafang Crank-Drives

    Hello all, Believe me or not and forgive me if this is a repost of information but I frequently speak with Vendors (Both friends and clients) so in addition I speak with many Chinese attempting to procure the best revisions of everything and to at minimum ensure we don't get a version with a...
  9. mwkeefer

    Astro 3205 motor on Cyclone planetary gear

    Okay so to the crank (chainring) you have sufficient reduction for 12S 7500 RPM down to 75 RPM (theoretical) RPM... which wind is your 3205? What kV? On that note, it should work well enough but... I caution you not to push too much power into the cyclone gearbox... maybe 1.5X and perhaps 2.0...
  10. mwkeefer

    Astro 3205 motor on Cyclone planetary gear

    Okay I'll spell it out. 12S @ 3205 = 7500 rpmi Sorry between the 3205 axle and the gearbox + final drive ratio output you need an additional 70-75:1 reduction for 100 rpm cadence. -Mike -Mike
  11. mwkeefer

    Bafang BBS-0X to Ed Lyen controller Wiring

    I wouldn't push the Bafang past 55.5 or 61.2v maximum input voltage without cutting the current back signifiigantly. Even still the gearing may not appreciate the speed you want to run it at. Just food for thought, be careful. PS: You don't need to remove any of the stock controller, just...
  12. mwkeefer

    Astro 3205 motor on Cyclone planetary gear

    What is the total reduction of the gearbox your intending for use with the 3205? What is the output gear and the driven sprocket/gear on the freewheeling cranks? My concern is cyclone motors run about 3K RPM and for the 32XX series Astro motors they need to maintain about 7500 for 90-94%...
  13. mwkeefer

    Anti Wheelie / Controlled Wheelie + On and Off Road BlackBox

    Apparently my last post was in poor taste, I was only trying to offer some beta versions at cost to those in the thread. If you are interested in helping, PM me for details on how - if you want demo units to test, same deal - PM me. Once the design is fully fleshed out, and ready for...
  14. mwkeefer

    Henry111's free tech support thread

    While you have a point, it's only because there aren't many us vendors with sufficient mechanical engineering to sell you kit, pack and proper chainring and freewheel or cassette to set you up. None of the Chinese vendors can do this and ice dealt with my fair share of our right dishonest China...
  15. mwkeefer

    EB3XX paramater designer edited for more range in here

    Neo, too late I've disassembked the Parameter Designer vb6 app... This was just before XPD became available so other than giving useable names to variables and one or two other changes it was abandoned. Your welcome to the code and my serial io library which is to replace mscomm32.ocx. -Mike...
  16. mwkeefer

    Henry111's free tech support thread

    Lowest single unit sample price in China is actually about 440.00 FOB - which means you pay shipping, if by sea it's a few weeks (ie: 1-2 months) before you receive it.. a single unit price will also be charged, about 100.00 more than the same price if you take 50-100 units or a few pallets to a...
  17. mwkeefer

    Bafang BBS02 48v 750w - Stock Problems - Part 1

    Bafang BBS02 48v 750w - Stock Problems - Part 1 Saturday, February 14, 2015 6:51 AM Hello All, The title is a bit of a misnomer, the issues aren't with the kit really as much as people with little or no knowledge installing it on their bikes and then blowing controllers, burning up gears, and...
  18. mwkeefer

    EB3XX paramater designer edited for more range in here

    I can't believe I didn't see this sooner... I started hex editing the Parameter Designer software long ago but what I've never tried (not even sure why not) is removing the MCU (Infineon, Xie Chang, Etc) and dumping the hex and eep data. I'm sure there is a simple way to dump the EEP which...
  19. mwkeefer

    HobbyKing Purchases (Warehouses)

    Last person I know who tried this was able to order from the East Coast warehouse to Quebec but that was about a year go at a minimum ! -Mike PS: Alternatively if you wish to place an order form the East Coast Warehouse, have it delivered to my Warehouse (second condo) I can then ship it...
  20. mwkeefer

    Strong freewheeling crankset

    Hey all, Im just curious and not at all trying to be a smart ass but... I think this thread is 13/14 pages long and I must admit I didn't read it all but I did skim and read bits and pieces and I'm wondering, have we or have we not come up with a decent strong freewheeling crankset. Some of...
  21. mwkeefer

    Barron Greig's MAX14920 Based Perfboard BMS

    Paint, how about Duct Tape :) 1004 uses and counting :) No really if it's a functional design you should be proud... once the roadworthyness and any further hw/sw bugs are addressed and it's 100% stable, sure I'll cad up some PCBs and BOMs for various cell counts and if I have any manufactured...
  22. mwkeefer

    Barron Greig's MAX14920 Based Perfboard BMS

    Ugly as SIN but with a bit of work, you have something there - heck functional BMS on Perfboard alone is impressive. Let me know if you want any assistance with either the windows or MCU side of the coding, or if you want some help in CAD designing an appropriate and much more compact design...
  23. mwkeefer

    Please weigh in: BBS02 750 with 12S 30A RC Controller?

    Well, consensus in... I'm gonna try it with a little 30A RC controller I have already beefed up the caps with LowESR type and added forced air cooling for when the bike isn't in motion. Using several RC controllers for various builds, I find heat really becomes an issue when you push the...
  24. mwkeefer

    [DEAD PROJECT] OSBMS - A scalable, low cost, and full featured BMS

    I know one of the issues of building a fully adaptable BMS (one usable from a single cell up while drawing proper voltage) to produce 5v from even a single cell. http://www.adafruit.com/product/1903 I located this on AdaFruit and while 9.95 is a bit much per unit, the PCB is based upon the TI...
  25. mwkeefer

    DIY Programmable BMS (now using ATtiny/Arduino)

    David, Im ready for the next interation samples to start helping with design and coding if you are still offering or in need of my assistance. -Mike
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