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  1. 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...
  2. mwkeefer

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

    Hello all, Before going and doing something I'm sure to regret, I thought I should ask opinions here. I have located in an old drawer an RC controller with good heatsink and programmable delays and power levels and cutouts and such. I'm considering disconnecting the Lyen 6 FET sensored...
  3. mwkeefer

    MUST READ - eBikes are LEGAL in the USA - Since HR727 8-2001

    To all my ES Brothers, I've been watching the back and forth, is it legal is it not... mostly US arguments, my state says no, NJ took my bike, I got a ticket for driving on a DUI suspended license and did 6 months jail time!!!!! E N O U G H !!!! Sorry I'm very frustrated, I've been explaining...
  4. mwkeefer

    Two Questions - BB Drive Systems

    Hello All, If you know me, you know I search ES and ES via Google and have spent about two days trying to absorb several technical threads and posts only to come up with more confusion and options to really pair down into some workable solution. On a side note, hopefully we will add a...
  5. mwkeefer

    Anti Wheelie / Controlled Wheelie + On and Off Road BlackBox

    Hello All, I have over and over again seen people requesting a simple method of adding a "legal" mode in their jurisdictions while still having offroad mode. While this can be done with the CA (I believe) some people just don't want a CA. Additionally I've noted posts here and on other...
  6. mwkeefer

    Power calculations, could someone check my work please?

    Hello all, I've been attempting to calculate the power requirement for a 20" bicycle to sustain 40 mph and I'm wondering if I missed something? [Calculated HP Requirement] Vehicle Weight: 245 lbs maximum loaded weight Frontal Area: 8 sq feet Drag Coefficient: .3 Air Resistance: 9.83 lbs of air...
  7. mwkeefer

    Bafang BBS-0X to Ed Lyen controller Wiring

    Hello all, I've noted several people looking to hook up an external Lyen type controller to their Bafang BBS0X mid drives and wondering about color, proper controller, etc so I thought I would post the color combinations and later some images of actual connections to the Bafang BBS02 I ride on...
  8. mwkeefer

    Experienced eBike Builder Call for RFC on BBS02

    Hello all, It's been a long time since I've posted here - life, and many things I just dont want to get into have kept me from ES Forums but I have been tinkering with the BBS02 all this time (when time has permitted). I have been informed by 2 members of the community that someone has managed...
  9. mwkeefer

    Astro 3220 has finally met its match !!!

    http://www.astroflight.com/new-products/4535.html With a 2000.00 price tag but a simply massive motor, you know someone will build the reduction for it :) (Recumpence) You must check this motor specs out! -Mike
  10. mwkeefer

    Attention: Bafang BBS01/BBS02 Users

    Hello all, As many of you have found out the offering of only 48 or 46 tooth chainrings is not the only issue with the bafang drives for your bikes... I have several bikes from Hard Tail mtn bikes to many, many 20" folders and I can say that yes chainring availability is a pain in the ass...
  11. mwkeefer

    Open-BLDC Logic Board on Castle Creations HV ICE Power Board

    Yes you read it right: hardware brain to graft onto HV ICE controllers to make them Open-BLDC controllers in a snap: http://www.flickr.com/photos/esden/sets/72157625297128209/ Too cool to pass up mentioning. -Mike
  12. mwkeefer

    Controller Cooling - Why Not?

    Hello All, I'm about to test a theory I have about seriously cooling controllers for eBikes (and probably killing an IRFB4110 EB809 at the same time). After testing the dielectric properties (don't ask) of several synthetic motor oils, then testing them against things like epoxy I've used to...
  13. mwkeefer

    RFC: XXXX - Smart BMS to Smart Charger Standard for LEVs

    Hello all; As I have been working on BMS code for various projects including the Arduino UNO BMS Shield among others, and I have thoughts back to some of my old analog "Universal Charger" circuits in the past (which worked mostly, think KingPin Triac board failures). It dawned upon me - If...
  14. mwkeefer

    Possible Arduino Shield for LTC6804, LTC6830 or LTC3300

    Hello All; There have been some questions raised in the Arduino Shield for IT bq76PL536A Thread with regards to using one of these ASICs (Application Specific Integrated Circuits) to design a functional Arduino UNO BMS Shield <Insert Chip Here>. I thought it would be a good idea to start a new...
  15. mwkeefer

    My first flat in 3 years

    Finally messed up my Dahon Jack with kevlar tires, no puncture just a crack at the valve stem caused by disconnecting pump wrong yesterday... oh well, beats a blow out and is a 5 minute fix with the GNG drive retaining the stock rear wheel :) -Mike PS: The point is be CAREFUL with valve stems :)
  16. mwkeefer

    BB92 to English Style Threaded Bottom Bracket ?? - HELP!!

    Hello all, Im looking at a fine bike but it has 2 drawbacks, #1 its carbon fiber so the strongest most suitable eBike conversion method would be bottom bracket but there is drawback #2 it's using a BB92 press fit bottom bracket and I know of no freewheeling bottom bracket systems which don't...
  17. mwkeefer

    Recumpence Davinci Dual Reduction Drive - HELP - NO BIKE

    Hello all, I have been looking to mate up the newest dual reduction Recumpence eDrive to a full suspension bike. I've found most FS (even single pivot point) bikes seem to lack appropriate downtubes to use bolt up Recumpence adapters. My concern is they are much thinner than my traditional...
  18. mwkeefer

    ES Database Missing Large Amount of Content from Searches

    Hello All, I've been really frustrated by this for a long time now - it seems the php bbs script being used by Endless-Sphere is still using a MySQL database backend with some lousy indexed entries missing - some are really important too... While this needs to be be addressed - if you go to...
  19. mwkeefer

    RFC: Could we setup a new category for HUB Motor Systems

    Hello all (KnightKMB), I am wondering if it would not make more sense (to me at least it does imho) to create under the Technical Heading at least one new Category of "Hub Motor Related" since we have "Non hub motor" and frankly it adds to the confusion of users / members I am certain (it...
  20. mwkeefer

    Somthing wrong with New Posts and View Your Posts?

    Hello all, When I attempted to view my posts, it showed me dozens of other users posts as results but not my own... when I then clicked on View New Posts I saw 2 in all, I expect 3 will show up after this post? Just wanted to raise the flag incase it hadn't been raised already! -Mike
  21. mwkeefer

    Can I take electric razor in the hand luggage in aircraft?

    If it's not lithium based battery then you should be able to, just be sure to have maybe the product specifications sheet as the case is inspected or xrayed - I imagine an xrayed razor scooter would look an awful lot like a seriously high tech weapon :) I'd call the airline and explain the...
  22. mwkeefer

    MS eDrive v3 + Astro Folding 26" Dahon Jack - v 0.1.0-I

    Hello all, First - thank you all *(hyena, AJ and all the rest for not continually riding me about when I was going to finally move to the RC arena)... Second - thank you to Recumpence for his patients these past few months as time would creep up and I would approach him for a drive system...
  23. mwkeefer

    eBike Emergency Triage - aka - Field Repairs

    [Hall Throttle Failure] Hello all, I'm sure this exists elsewhere (doesn't everything now) but last night I noticed my trailer hitch on a Dahon Jack (FWD geared hub 18S) was causing the rear wheel to move in it's mount (it's the receiver type hitch which wedges between the QR skewer for the...
  24. mwkeefer

    Nexus Inter3 26" Rear Hub with Coaster Brake?

    Hey all, I have a 26" rear Inter3 Coaster Brake type hub wheel which I want to use with a 3spd adapter I got from tppacks and an RC drive... the question I have - do I really need to disable the coaster brake? I suppose adding some form of interrupt when the hub back pivots would be needed to...
  25. mwkeefer

    Razor 350w 24v Scooter -> 1/3 scale RC

    Hey all, Well I've been working on a razor go-kart I grabbed from the rubbish pyle some time ago - it's one of those little kid (supposedly 12-16 but it does 15mph with me + my 4 year old so 240lbs)... Pulls 25A maximum @ 26A and is quite speedy.. It came stock with a pair of SLAs which had...
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