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  1. J

    Strange LiFePO4 behavior

    I have noticed something very strange happening to my Thundersky LiFePO4s. They are the 20ah cells from Elite Power. I have 2 4-packs for a nominal 24V powering a 350W brushed Unite motor. I’ve had them about 3 months and have gone about 350 miles. The most I’ve discharged them is...
  2. J

    ATX power supply

    I have an Accucel 8150 charger that works nicely for my 8s LiFePO4 pack. It runs off an 11-18V power source and wants 150W. I'm currently using a couple of old 12V SLAs in parallel and a 6 amp charger. A friend has a 300W ATX power supply from an old computer. They normally get switched by the...
  3. J

    Celllog alarm output questions

    Can someone explain to me what happened here: I have a celllog 8m that I wanted to use as a LVC with 8 Thundersky 20ah cells. I have an inexpensive JC-116 controller that has an ignition plug and a plug for a brake switch. The ignition plug requires a closed switch to operate (I use a bent paper...
  4. J

    LiFePO4 questions

    Hi Folks – I have a pair of Thundersky 4-cell 20ah packs from Elite Power Solutions that power a 24v 350W brushed Unite on a shift kit mtb. I have done a search here and looked through the Thundersky pdf but I can’t find all the answers to these questions. I would like to know the...
  5. J

    Dual Freewheel Front Sprocket system

    Hello folks - I have developed and bench tested a prototype dual freewheel front sprocket system to allow an emotor to power the bicycle through the pedal crank so the shifting system (rear hub or derailleur) can be utilized. One freewheel allows the cranks to remain stationary when under motor...
  6. J

    freewheel sprocket for 11 mm (7/16") shaft

    Hi folks - I've been working with Jim Welch at SickBikeParts to adapt their gas motor kit to a GT I-drive mtb that I intend to power with a 350W Unite 1016Z3. I've been looking for a freewheel sprocket or even just a freewheel for the output shaft of the Unite. It's a 11 mm (7/16") shaft with a...
  7. J

    3 speed front wheel drive e-bike

    Hi all – I built a front wheel drive e-bike and have completed some testing on it. You can read about the build and see some pix at http://endless-sphere.com/forums/viewtopic.php?f=6&t=12318 I’ve posted one view below. Here’s the basic description from that post: “I...
  8. J

    front wheel drive e-bike

    Here are some pix of my new ebike. I acquired a matched pair of old Huffy 3-speed bikes - the kind with the internal gears in the rear axle - what we called an English bike when I was growing up. I put the rear wheel from one on the front of the other with the sprocket on the right so it will...
  9. J

    24 v sla charging

    Hello - I am new here and am just starting an ebike build. I will be using 24 volt sla power pack (2 12 v 12 ah in series). I may step up soon to a Li pack, so I am thinking about using a 12 volt 5 amp charger I already have, rather than purchasing a 24 v charger that probably won't be optimal...
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