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    kbern

    @kbern

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    Location Lake Tahoe, San Francisco, Cupertino

    kbern Follow

    Posts made by kbern

    • RE: Portable charger

      @itwire For your car you should just get a power inverter (~$20) and connect it to your car battery... leave the car running and charge the Onewheel as many times as you want.

      posted in Product Wishlist
      kbern
    • RE: DIY "mobile supercharger"

      @SkyPilot @wr420 yup, pin 2 & 3 are both "+", per the instruction page (though that tidbit is easy to miss):
      http://onewheel.wiki/Charging_on-the-go
      and I tested both + pins with a voltmeter to make sure they both had good connections.
      Thanks for brainstorming. Let me know if you can think of any other potential issues.

      posted in General Discussion
      kbern
    • RE: DIY "mobile supercharger"

      @JacoNZ Thanks. Yeah, I think so too, though I'm still confused about why the 12V battery can't output 3.5A, but I will try a higher voltage battery and see what happens.

      posted in General Discussion
      kbern
    • RE: DIY "mobile supercharger"

      So, I built one of these, thanks to this thread (thanks @cr4p ) and this great instruction guide: http://onewheel.wiki/Charging_on-the-go

      I've attached a few pictures below.
      I've tried two methods:

      1. 12v/10Ah (120Wh) LifePo4 battery + 300Watt power inverter + Onewheel supercharger
        Total Weight (including Onewheel charger): 5lbs, 8oz
        Results: Charge Onewheel 65% in 30min

      2. 12v/10Ah (120Wh) LifePo4 battery + 58v up-converter
        Total Weight (no Onewheel charger needed): 3lbs, 15oz
        Results: Charge Onewheel 72% in 90min

      Needless to say, I'm disappointed with my results using setup #2 (basically the setup described in this thread) both in terms of the minimal charge improvement over the 120v inverter method but also/mostly in terms of the 90min charge time.

      The thing I don't understand (which is probably why the charge time was so long) is that I programmed the up-converter to deliver 58v and 3.5a but it only actually was delivering at 1.1a. Did I do something wrong? Do I need a different kind of battery? Any suggestions would be appreciated.

      Method 1:
      0_1498144389352_IMG_3114.jpg

      Method 2:
      0_1498144412601_IMG_3115.jpg

      Charging display during 90min/72% charge session, showing only 1.1a draw:
      0_1498144580574_IMG_3119.jpg
      0_1498144592573_IMG_3120.jpg

      posted in General Discussion
      kbern
    • RE: Tire pressure a bigger deal than I thought!

      I just received my OneWheel+ (yay!) and my screw-on pump no longer screws on enough to engage the valve-stem. This used to work, and the pump screws on to other, similar, valve stems (e.g. bicycle, motorcycle).

      Has anyone else experienced this problem?

      I use this pump for my tire:
      https://smile.amazon.com/Progressive-Suspension-GP3-30-0-30-Gauge/dp/B000GZPGCQ/ref=cm_cr_arp_d_product_top?ie=UTF8

      posted in General Discussion
      kbern
    • RE: Tire pressure a bigger deal than I thought!

      @jc
      https://smile.amazon.com/Progressive-Suspension-GP3-30-0-30-Gauge/dp/B000GZPGCQ/ref=cm_cr_arp_d_product_top?ie=UTF8

      posted in General Discussion
      kbern
    • RE: Tire pressure a bigger deal than I thought!

      @MichaelW I have that same gauge and love it

      posted in General Discussion
      kbern
    • RE: What kind of pump to use to put air in your OneWheel?

      I just received my OneWheel+ (yay!) and my screw-on pump no longer screws on enough to engage the valve-stem. This used to work, and the pump screws on to other, similar, valve stems (e.g. bicycle, motorcycle).

      Has anyone else experienced this problem?

      I use this pump for my tire:
      https://smile.amazon.com/Progressive-Suspension-GP3-30-0-30-Gauge/dp/B000GZPGCQ/ref=cm_cr_arp_d_product_top?ie=UTF8

      posted in General Discussion
      kbern
    • RE: An update'ish on order #74**

      @s2kboy Yes, plus, I got the email at 1pm, FedEx showed info a few hours later, that it was coming today! (one day delivery). Shipping from San Jose, CA to Lake Tahoe... SICK!

      posted in General Discussion
      kbern
    • RE: An update'ish on order #74**

      Just got my shipping notification for my board! #7312

      posted in General Discussion
      kbern