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  1. auraslip

    What sort of connectors do you use on brake levers and throttles?

    Right now I have two types of connectors that I crimp, but I'm kinda out of following the forum every day. Am I missing a popular connector? This is what I have now. The white ones were a PITA to source since they don't have an OFFICIAL name.
  2. auraslip

    I built an ebike throttle and brake tester

    5v meanwell panel voltmeter from ebay speak spring terminals from ebay EZ PZ. Brakes go from 0v-5v on-off Throttles go from 0v-5v in a sweep (oddly the off position with throttles has been between .6v and .9v - i didn't realize that was the case) I built this rig to test the 100 lbs of...
  3. auraslip

    Golf Cart frame shocking me

    Ok. So the frame shocks me and displays voltage on the meter. I can't seem to find any direct connection to the 48v system. Normally I wouldn't care but the car has fried 3 after market controllers and navitas has stated that it is most likely because the car has a short or is frame grounded...
  4. auraslip

    My boss asked me to build a golf cart that can "smoke tires"

    I have at my disposal a lot of 8v 250ah lead gel batteries, 7kw brushed motors, and one stretch golf cart frame with plenty of room for batteries (twice as much as a standard cart) My boss wants to build a marketing car. One we can take to shows and hold the brake and gas down and make some...
  5. auraslip

    Could I make cylindrical-cell pack with rubber bands?

    Take a strip of copper or whatever metal. Heat shrink it. Dimple it according to how you want you pack set up. Cut the heat shrink away from your dimples. Place 18650 cells between the strips and use rubber bands to secure the cells. The strips hold the parallel cell groups in shape and form...
  6. auraslip

    Has anyone made a quality hall throttle yet?

    Or am I still stuck with my magura that I can only use half the range of?
  7. auraslip

    Trouble current limiting an eb318 em3ev controller

    I just got a eb318 controller from cell_man and I'm using it with my 14s4p lipo pack along with an hs3540 clyte hub. I've already cranked the current up to 120a, and man is 6kw of power fun. But on researching it zzombies says I should limit his controllers to 75a and cell_man says I should...
  8. auraslip

    CA not displaying speed?

    Just started happening today. Speed will drop to zero. Voltage will drop a few volts and then shoot back up. Sometimes the speed comes back on. Oh, and the regen is now much lighter. Hardly any stopping power. Any thoughts on this controller? edit: I don't think it's a problem with the CA or...
  9. auraslip

    ebike wiki

    Hi everyone. I've been posting here for awhile, but come and go as my projects start and stop. I have been the mod of the ebike subreddit for a long time now, and we've just crested 1k users. Anyways, a user suggested I enable the wiki function on the ebike subreddit, so I figure I'd post...
  10. auraslip

    Icharger problem

    I'm having a problem with my icharger. The balance port works correctly, but when I connect the main leads the balance ports stop working. Additionally, I get a reverse polarity error if I connect the balance ports and then connect the positive main lead. There is a burnt smell coming from...
  11. auraslip

    Sick of Chinese junk

    I don't think I can rely on ebikes for transportation or seriously pursue this hobby anymore. It's too reliant on cheap chinese junk. In the past week alone I've had: A) Batteries fail well before they should B) An icharger fail (this is what really screws me. My bike building project is...
  12. auraslip

    Crystalyte motor motor knock (godbless chinese quality)

    8TLsWKaU5rY Yes those are clamping drop outs. I haven't ridden this bike or motor for 2 years. It did not do this last time I rode it and the motor has not been removed from the bike. It's a hs3540 from ebikesf laced into a 24 inch rim. In the video the wheel is slightly out of true. I...
  13. auraslip

    Building the best commuter (DIY) ebike.

    This will be my last ebike. Well, the last one built for transportation. After this comes a motorcycle or a car. Maybe years down the road I'll be able to justify a good toy ebike like all you 100v+ addicts. Last start with my design rules. 1: Safety. Two parts. Big tires, suspension fork...
  14. auraslip

    sine wave controller effeciency and 3077 vs 4110 effeciency

    I want to find the most efficient way to run my low voltage commuter bike. I've been thinking for a long time about switching to a lower voltage controller because I heard of 3077 fets are more efficient then 4110 fets and I'm obsessed with building the best commuter ebike possible! I'm trying...
  15. auraslip

    Stupid battery discharging testing questions

    1. "Set you lvc at 3.3/5/6v!" Ok. When you say that. Do you mean discharge until your pack hits that under load, or until the resting voltage is that low? If it's the former, it makes it impossible to test the absolute maximum capacity at real world loads. For example, I want to test from 4.2v...
  16. auraslip

    Using ring connectors to build large lipo packs

    Two options when putting lipo packs into parallel groups: 1: Make a harness with andersons/bullets. This allows you to quickly swap them out for testing or reconfiguring. The down side is it takes forever to make these and uses up lots of parts. It also makes a rat's nest of your battery pack...
  17. auraslip

    cleaning off an oil cooled controller for repair

    Hi, I soaked my controller in baby oil to cool it. The results were great, but something popped in the controller and now I need to work on it. Can I soak it in rubbing alcohol to get the oil off of it? If not that, hopefully something around the house can be used. Thanks.
  18. auraslip

    ping charger and BMS dead with a week of use

    I've been MIA for awhile as I moved on to other things in life (and I've been too broke to build anything), but I did just finish rebuilding my old work bike. It has an old 16s20ah ping battery, but with a brand new BMS and 2a charger from ping. It's a nice setup with the bms and charger in...
  19. auraslip

    testing/re-componenting a 48v20ah Ping pack with 10k miles

    Been awhile since I've posted here! Anyways, I'm about to rebuild my old "workhorse" ebike that I've used as a back up bike for the last year and a half. The ping pack hasn't held up so great going on 10K miles. The bms fried twice (first time defective-second time the replacement fried when I...
  20. auraslip

    Why won't tesla show it's battery pack?

    Just watched this documentary on Teslas factory in freemont. http://www.youtube.com/watch?v=VVktbM6jZxg&feature=share Looks awesome. Love how everyone gets around their factory on bikes. Sadly, like almost every EV doc they never do true justice to the battery pack, and in this case they...
  21. auraslip

    7000 18650 cells in the model S tesla... smart or dumb?

    So the 2013 car of the year is the new Tesla sedan. Looks quite nice! But the battery is huge and made from 18650 cells and the whole thing costs $20k. Why does this make sense? They seem to have poor energy density, and the fact that there is 7000 of them must raise the cost of producing the...
  22. auraslip

    Lipo failure rate @ 70% - what now?

    MAH LIPOS AVE GONE BAD MATEY! But seriously - 4s hardpacks are a year old. 6s turnigys are a year and a half old. less than a hundred cycles. cycled at 4.15v to 3.5v. ran in 22s10ah. 60a controller limited. NEVER ABUSED. I KNOW BECAUSE ALL MY BIKES HAVE CELLLOGS INSTALLED. 6 out of 10 hardpacks...
  23. auraslip

    Powering up an ebike with out parasitic drain.

    Powering up and powering down my bike has been one of the biggest challenges in building them. I like the security, ease of use, and slickness of a keyswitch provides. But there is parasitic drain. It's not a huge problem because when my bikes aren't in use, they're on the charger. However, this...
  24. auraslip

    Lifepo4 won't stay balanced while sitting in storage

    2+ year old 48v20ah ping. Over 10,000 miles. May have been overcharged to 4v a few times. Capacity un-tested in the last 12 months, but previously it was holding up fine. NO BMS ON THIS BATTERY. Sitting on my power supplies in storage, as in ready to ride when ever, at 3.6v per cell It goes...
  25. auraslip

    Anyone voting for Romney after hating on EV's in debates?

    Seems like he name checked Tesla once or twice in multiple debates as wasteful government spending. I'd like to hear thoughts from conservatives and people working in the industry about that. Is it Mitt just saying what ever he needs to get elected, or does he actually believe "battery powered...
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