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  1. J

    Woman sets up thief who took her bicycle and gets it back in spectacular fashion

    https://www.reddit.com/r/nextfuckinglevel/comments/10tsw8m/woman_sets_up_thief_who_took_her_bicycle_and_gets
  2. J

    Nucular 24F - three for sale, order being processed not yet confirmed

    Thermo Nucular controller 24F NUC24F Before shipping USD $600 Will sell for $200 over and above fully loaded costs, including shipping, US Customs tariff/excise if any, etc etc 6F and 12F not available, nor BMS On-board computer NUCDISP — $ 110 Sur-Ron connectors NUCSURW — $ 50 Choose your...
  3. J

    PD / PPS charging, USB testing device as programmable charge regulator

    https://ripitapart.com/2022/12/31/directly-charging-li-ion-batteries-with-a-usb-c-pd-tester
  4. J

    Coulomb counting Ah Wattmeter

    Looking for purchase links for this, reco by @methods : https://youtu.be/YI3m5R6i3OU a non-Amazon source would be great, don't mind if slow, may want to buy in bulk a two-way version even better Also a link to the crap one he mentions so as to know not to bother testing it, would be...
  5. J

    My take on dendrites

    Not getting into papers / studies / evidence here, purely practical real world advice not just about dendrites either, they are just one symptom, but preventing damage in general. May not be useful for those whose "abusive" use cases requires lifespan shortening. Charging too fast relative...
  6. J

    New motor: QS 138 90H V3 4kw mid drive motor with 1:2.35 gear box

    I wish they had precise model #s https://www.aliexpress.us/item/3256804487876683.html Please discuss this motor here other motors only in comparison, please use other threads for getting into the weeds on any other topics, or starr your own it's Free! My interest specifically is heavy cargo...
  7. J

    16.75 VDC output needed @3.5A

    Need a power supply with the above output, producing resistive heat, actually first feeding into a variable power control I assume some wiggle room on the voltage but dunno, prefer as close as possible. Same with the current spec the control may not be current limiting, rely on the PSU for...
  8. J

    New motor, USA made: Optibike Powerstorm MBB

    Hype, but interesting https://electrek.co/2022/09/12/optibike-2500-watt-electric-bicycle-motor Wonder if adaptable for a multi-drive cargo bike? Or maybe use the whole OTS bike and adapt? Or with a trailer?
  9. J

    Thread for fires and legal threats

    https://www.upmatters.com/news/local-news/eastern-up/e-bikes-banned-from-areas-of-mackinac-island-after-house-fire
  10. J

    12v battery charging and issues

    The chemistry of the battery dictates how it should be cared for. sulfating?? Using a lead unit in an EV seems foolish to me, but at least then it should be super easy and cheap to replace. Only a precise capacity test reveals State of Health, ESIR requires comparing the current state to...
  11. J

    Five of seven fire deaths in Vancouver this year are blamed on battery fires

    https://vancouversun.com/business/take-care-charging-or-modifying-lithium-ion-batteries-experts-warn
  12. J

    Bafang BBSHD Fatbike Frame by ELEEK

    https://youtu.be/1Wq3lGEIZTM This thread is open for discussion of all aspects of this frame. But I'd also like to query the groupmind about it wrt my specific use case First, motor / controller Personally, I need low-end torque, slow climbing of long steep slopes with high weights. No fixed...
  13. J

    Industry worried about fed regulations, selling “overpowered” bikes

    https://www.reddit.com/r/ebikes/comments/uxtuv9/ebike_industry_is_getting_a_bit_worried_about_fed
  14. J

    Hackaday: DIY Arduino Based EV Charger

    https://hackaday.com/2022/04/28/diy-arduino-based-ev-charger-saves-money-looks-pro/#more-532326
  15. J

    QS 165 5KW 70H mid drive motor (encoder type) new 2022-02

    Just got an email from "Judy Gong" at QS MOTOR / SiAECOSYS announcing a new release Since they refuse to give unique model#s I figure maybe a separate thread may help focus discussion of specs, controllers erc as we learn more. ________ judy@siaecosys.com -Skype: judy.gong5...
  16. J

    QS 180 8KW 90H mid drive motor (encoder type) new 2022-02

    Just got an email from "Judy Gong" at QS MOTOR / SiAECOSYS announcing a new release Since they refuse to give unique model#s I figure maybe a separate thread may help focus discussion of specs, controllers erc as we learn more. ________ judy@siaecosys.com -Skype: judy.gong5...
  17. J

    Want suggestions for cargobike with large mid-mount motor

    Anyone please suggest a cargo platform frame that would be suited to Lighting Rod's XXL on the left side, including regen braking with maximum possible use of pedal power on the right, maybe a belt, robust hub gear like Rohloff. Don't care at all about looks, nor sporty "fun", sitting up...
  18. J

    24Vdc input, 19V output 400+ W continuous

    Looking for a DCDC buck converter, or hobby charger with a stable PSU mode and adjustable voltage output
  19. J

    Smart ESC

    To keep the Flipsky thread getting too diverted @Koxx > and for low cost, we created the SESC, partially VESC based, open source, vesctool compatible but running on a 25€ xiaomi hardware. github is here : https://github.com/Koxx3/SmartESC_STM32_v2 and telegram help group os here ...
  20. J

    Parallel charging of LiPo batteries

    What do you mean here by "backup"? Please describe the use case, target loads, current rates et.c. > So I wired them all up in series (1S12P; 3.7v, 120Ah There are no series connections there, all are paralleled. It would be much more efficient to go to 2S and step down to 5V. I am confused...
  21. J

    Is this real?

    https://www.reddit.com/r/nextfuckinglevel/comments/reuvyw/for_those_who_love_to_walk
  22. J

    Death wish in NYC

    NYC scooters be like… https://www.reddit.com/r/nyc/comments/qc7u3p/nyc_scooters_be_like_this_is_not_me_recording_btw
  23. J

    PR for Watt Wagons

    Massachusetts company producing hand-built e-bikes dubbed 'Watt Wagons' https://www.wcvb.com/article/massachusetts-company-producing-hand-built-e-bikes-dubbed-watt-wagons/37993868 Good outfit, quality products right? Any have experience with their after-sales customer service?
  24. J

    SICB 2.4V10ah LTO battery

    Your location, and pricing are required
  25. J

    Students’ solar-powered camper van turns heads on 1,800-mile road trip

    Dutch team designed and built two-person van with kitchen, bed, shower, loo and range of up to 450 miles a day https://www.theguardian.com/environment/2021/oct/15/students-solar-powered-camper-van-turns-heads-on-1800-mile-road-trip
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