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  1. H

    BMS Schematic help

    I'm having trouble with a BMS. It seems that many times after hooking up, the BMS seems to be in a "locked up" state, wont charge or discharge. At first I thought that they were DOA, and just broke, but one came back to life. I'd like to understand the problem better, so I created a schematic...
  2. H

    First production fuel cell electric bike

    Interesting article below about a commercial fuel cell electric bike, available in 2016. http://www.bike-eu.com/Home/General/2013/5/Launch-of-Worlds-1st-Hydrogen-Fuel-Cell-E-Bike-1269941W/ I'd love to test a prototype battery. Mark.
  3. H

    Add a Cree HeadLight to your 48V system

    Here's a way to add cheap, but powerful head and tail light to your 36 or 48 volt system for under $50. Start with this Cree light package from ebay for $30. This is a Super bright light that has more than enuf power for night rides. It Includes a small battery pack that you will not need...
  4. H

    Electric Bike to Work Day

    I put my helmet cam on and recorded my ride home yesterday, during the California Bike to Work day. Below is about 10 minutes of excerpts of a great ride around San Diego. We have some wonderfule bike routes. http://www.youtube.com/watch?v=MS8QpADTock&feature=youtube_gdata According to the...
  5. H

    Why Packs Fail Prematurely: LVC

    I’ve been pondering why some folks can run and run on their packs, and others (like me) have packs fail routinely. I’ve had the revelation that the low voltage cutoff (LVC) is the root of failure for packs with parallel cells, and heavy use. Cells can never exactly matched for power, which...
  6. H

    BLDC Brain and Simple Brawn

    Jeremy started this concept of a Simple BLDC Controller brain in this thread: http://endless-sphere.com/forums/viewtopic.php?f=2&t=23350 And he published some nice schematics using a MC33033 chip as the brain. I thought the 'Simple' part of the concept could be improved with a better CPU...
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    BLDC Brain

    Very impressed with Jeremys ongoing Simple BLDC project at http://endless-sphere.com/forums/viewtopic.php?f=2&t=23350 However, I think that there is a better brain for a controller than a MC33033. I believe that all of the functionality can be better implemented in a flexible CPU architecture...
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