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  1. quuxman

    Mellow out throttle without sacrificing full throttle?

    Is there an analog way to mellow out a throttle without sacrificing full throttle (like adding a resistor would?). My setup is quite jumpy in the first 1/3 of the throttle, but I can't think of a way to reduce the voltage in this range without reducing full throttle. Unfortunately I do not have...
  2. quuxman

    controller for running Q100H at 48 volts, and motor maintenance

    I've been quite happy using my Q100H (front wheel motor) for the last few years with the controller it came with from bmsbattery.com (S06S), but now I'd like to change the controller to run on 48V. I want a new controller for 3 reasons: first I'd like to get a better battery and have it work on...
  3. quuxman

    controller with PAS input customizable via 3 way switch?

    I'm looking for a 48V controller for either 20 or 30 amps (depending on which motor it drives) with inputs for PAS (and throttle of course) that can be customized with a 3 way switch. I want the 3 way switch to control overall power (or speed limiter would be OK I guess) and to enable PAS. So...
  4. quuxman

    Booster winding for efficient large RPM range

    While riding my local electric train with ebike on board and thinking about tradeoffs with different windings, inspiration struck. I see little reason to stick with one speed of winding. I knew the engineering must be out there, and sure enough, it's called a booster winding, and surprisingly...
  5. quuxman

    Cheap USB power adapter for any battery under 60V

    There's this really nifty DC DC converter with 2 USB plugs on Amazon for only 13$! Actually my friend got 3 of them, and I soldered two into Anderson plugs, and the third directly onto a battery. Although rated at 50V, I tested one at 59V and a few watts for a couple hours. It got warm but...
  6. quuxman

    Super cheap 18 watt headlight

    I got this 13$ 18 watt LED motorcycle headlight from Amazon and soldered a 2.1x5mm female power connector (also from Amazon) on it. It took me a while to figure out a reflector bracket worked great for mounting to my mountain size handlebars. The bracket that came with it was useless. I was...
  7. quuxman

    Mac motor making clunking noise and not spinning

    I'm trying to trouble shoot a mac motor which previously had been working. There are very few miles on this motor. After working on a battery issue and testing the system, the motor started to make a loud clunking sound and not spinning. It jerks a bit and makes maybe an eighth turn each time...
  8. quuxman

    Maybe 2 megawatt motor? (Motor porn)

    There's 2 of these guys, one on each side, driven by 4 750 kW generators. Check out the size of those power cables... bigger than my leg. The motor is about 8-10 feet long :).
  9. quuxman

    BMS shuts off far too soon on two Li ion packs

    I'm having some trouble with two lithium ion packs that shut off too soon. One is a 9 Ah pack that shuts off after 2 Ah and a resting voltage of around 52. The other is a 12 Ah pack that shuts off around 9 Ah and a resting voltage of 47. They both had sat around for a while without being used...
  10. quuxman

    CruzBike FreeRider / SofRider BBS02 build report

    I'm pretty happy with this build. As far as I know, it's the first of a kind, being a FWD MBB mid-drive recumbent. A friend of mine and I have built up a variety of 6 rear wheel hub motor CruzBikes (using front wheel hub motors), but I've been curious about mid drives, so we decided to split the...
  11. quuxman

    Hybrid by connecting controller to inverter generator

    I've been thinking about lightweight hybrid electrics for 10 years off and on (mostly off). Fuel cells systems on the market unfortunately still do not have practical power density, so that leaves gas generators. I recently came across this little unit...
  12. quuxman

    Adjusting cut-off voltage of EMC-120 charger from bmsbattery

    I'd like to adjust the cut-off voltage of my charger so I can set it to charge my battery to 80% for optimum lifetime. I'm just never going to figure out the timing to unplug it around the right time, especially since I'll be charging from a random level of discharge. I opened up the charger and...
  13. quuxman

    Speed settings on Infineon controller

    I recently ordered a 6 fet IRFB4110 Infineon controller from em3ev.com (along with USB plug), and have a question about programming it. I found this page describing the settable parameters: https://code.google.com/p/xpd-ebike/wiki/ParameterDescription I'm guessing the 3 speed switch controls...
  14. quuxman

    Awesome German rim motor concept

    I was just poking around looking for a rim friction drive motor like the Velogical Velospeeder that you could ideally actually buy and wasn't god awfully expensive, when I came across yet another unavailable concept that's even more awesome, and even more expensive. It's a motor built into the...
  15. quuxman

    Cruzbike Sofrider with Mac 10T

    This is my workhorse that I ride everywhere and carry everything with, including all my food and drinking water, as well as camping gear when I go for bike camping trips. It's possibly a little too powerful (with controller supplying up to 1300W), never actually requiring pedaling (though I...
  16. quuxman

    Cruzbike Quest with Cute 100

    My latest build, which I decided to make a lot more light weight / stealth / low power / efficient than my first (https://endless-sphere.com/forums/viewtopic.php?f=6&t=71797). I started with a stock Cruzbike Quest, and added a Cute 100H motor with 36V 10Ah LiFePO4 battery and tiny S06S...
  17. quuxman

    Having trouble with new controller

    I got all the parts from bmsbattery.com in the mail for my second ebike build, which I'm pretty excited about. However, when I plugged the controller in (S06S 250W Torque Simulation Sine Wave Controller) after soldering the Anderson power connectors and plugging in the little cycle computer that...
  18. quuxman

    Yesterday I replaced my Mac motor clutch, created guide

    I've been riding this motor for 2 years and have now put 4350 miles on it. A few months after I got it, I applied full throttle from a stand-still while dropping off a curb and got a very loud startling clacking noise and the motor lost power. Over the miles, it very slowly started happening...
  19. quuxman

    Calling all Bay Area ebike riders

    I'd really like to see some sort of group for Bay Area e-bike riders. Could simply be a mailing list, maybe even a monthly meetup. If this already exists, I want to join, and if it doesn't, please send me your email and I'll start it. I have two main motivations for this: 1) I have one friend...
  20. quuxman

    servicing a mac motor that's making a scary sound

    increasingly, whenever I hit a bump or very hard turn under power, my motor makes a terrible clacking noise and loses power. first time was when it was practically new when dropping off a curb. It just happened today with no bump at all after hitting the throttle. pretty sure I need new gears...
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