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  1. S

    Looking for front or rear geared hub motor with or without 20" rim

    Just as the title says. A motor rated for 500 or more watts (so, not those tiny 250w ones). Geared is preferred but I'll consider direct drive. 20" rim, with or without. Doesn't matter. What do you guys have for me?
  2. S

    How slow can you wind a motor?

    We all know winding style determines whether motor will have more torque or speed (and I have read some of the "Science, Physics, Math, & Myth" thread. What a long discussion that is :shock: ). The well know Turnigy C80100 as an example. Pretty fast spinning motor, with Kv of 130. It's noisey...
  3. S

    Hitec X2 balance charger repair: 9/14- identifying component

    It's a dual 200W charger and I plugged in a battery backwards to port 1. It stopped working (You'd think they'd have reverse protection?!). Port 2 of the dual charger works as normal. I cracked it open. Determined to fix it. Seeing as I am able to compare the two halves, maybe it's not too...
  4. S

    Anti-wheelie device

    So many of us have wheelie machines, right? :mrgreen: Even with a throttle tamer and extended swing arm, my bike still tends to wheelie at take off! So I'm proposing some type of device that detects when the front wheel lifts off the ground and either cuts or suppresses the throttle signal...
  5. S

    (solved) EB218 18FET regen stutter/not working correctly

    SOLVED When I engage regen it stutters, as if it's only working on two phases or halls are going crazy. I observe my CA speed reading also goes haywire. into the 30's to 50's if I'm only doing 20 and enable regen. Speed reading is fine during all other points of operation. Everything else...
  6. S

    From infineon to kelly - comparison?

    http://kellycontroller.com/kbl96351e24-96v350abldc-controllerwith-regen-p-1258.html Rated at 350 motor amps for 30 seconds. 140 continuous. How's this compare to the infineon controllers? Will it give me that initial burst of current needed to outrun ICEs at the stop light (like infineons do)...
  7. S

    24FET controller melted from loose FET nut.

    I was off to work today on my new Lyen 24FET which I acquired from another member in unused condition. Built by (most obviously) Lyen and modified by Methods. Doing 700W on flat... suddenly.... controller failure. No explosions. Just a silent controller death. I had to pedal back home and...
  8. S

    Cycle Analyst cuts throttle at 131v

    Spent a few hours trying to figure this one out... my Lyen 24FET 4115 is not working at 131V. Seems to work at 130V. Tried: changing settings in software Changed R12 to values between 300 and 600 ohms. ..and a combination of the two. Maybe there's something I missed? Something with the high...
  9. S

    Lyen 24FET doesn't accept new settings

    I have two LYEN 24FET 4115 controllers (I believe they're part of the EB2xx series). Both controllers won't accept new settings when I press button to transmit. - tried Lyen's software and XPD - all my other controllers receive new settings, (so my adapter is good/working). - tried all board...
  10. S

    Converting 6FET 4110 to 6FET 4115

    Hi all! I decided on rebuilding my 4110 6FET into a high voltage backup controller. Necessary changes I made for HV operation R12 is 600 ohms (2x programmed regen multiplier) R01 is 500 ohms. 4115 FETs added. High voltage caps added It worked at 90V, but 126V it took out the Lm317 which I...
  11. S

    1.2V on 5V rail - Lyen 18FET - Photos included

    The problems never end with this thing! Had a wheel lock glitch today which I posted about. Fortunately was able to get around that and use the controller. A mile into my ride it quits. No speed reading and no throttle input = No 5V for the hall sensors or throttle! So I open it up and do a...
  12. S

    Controller has "wheel lock" like glitch.

    sG-s4KwVHAk This is the controller Lyen sent back to me in (supposedly) repaired condition. I noticed his test video don't use high voltage, like we put through the controllers. It worked for 20 seconds and suddenly wheel locked up and I lost throttle control. It's been a few days now, and...
  13. S

    Connecting cells w/ Alum. tabs without solder?

    I've got Nissan Leaf cells which I soldered together to make my battery. Now am finding some of the solder points on the aluminum tabs are falling off, despite using appropriate flux. Does anyone know another way of connecting the cells? My thoughts were using rivets or.. I also have a MOT...
  14. S

    My bike went full throttle by itself?! (Video)!

    So I was chilling in my underground layer after spending over 12 hours fixing and modifying this Lyen 18FET 4115 controller (after it failed yesterday shortly upon receiving it in the mail) when all of the sudden... wvAZxbJ-k4w And that "thud" you hear at 39 seconds is the wheel coming to a...
  15. S

    Server PSU with adjustable voltage recommendation?

    I've been using two SunFire V480 server PSUs (220V in, 48V out) in series for my 24S pack in the past... those two in series gave me around 98V (couldnt figure out way of tuning output voltage, apart from increasing it by a fixed 1.5V or so). Now that I'm stepping up to 32s and thinking of...
  16. S

    Calculating required swing arm length for no wheelies

    Anyone have any idea how to calculate about how long my swing arm length would have to be to prevent wheelies for a given power input? Either by math or simulations. ...because right now I have this 15inch extension and would like to shorten it without making the bike do wheelies again. Edit...
  17. S

    Residue between FET legs is blowing controllers - solution?

    I've noticed that in building or repairing controllers, residue is left behind from the solder. I've done (almost) my best to clean it but this sometimes comes up: Watching the board closely after powering up, I first see smoke. I cut power, examine.. and find a charred path between the FET...
  18. S

    4115 controller will not run at 146VDC

    Controller works fine under a certain voltage (around 100V range), not sure where the upper limit is. But I've now stepped voltage up to 146 and controller will not power the motor. I've already changed R12 to 230 ohms, well below the suggested 600ohms. What else am I missing? Edit: I...
  19. S

    Toasted Amped Bike geared motor ->now rewinding thread Pg. 2

    I let my friend ride my ebike around the park for some time. He returned it to me with a fried motor. :( So first I thought: clutch broken? gears stripped? winding cooked? The motor seemed to spin up fine with no load, I even tried it in reverse. But with any load it did not work well. Upon...
  20. S

    Cycle Analyst speed sensor NO WORK

    Running a geared motor here, need speed readout using the wheel thingy... but I am stumped. SP (Speed) contact connected to ground (let's say I tapped it several times a second) should show an MPH reading, Yes? I get nothing. Neither did I when I first tried it with a reed switch and magnet...
  21. S

    18FET explodes when ignition on

    One rainy day I parked my bike and turned wheel lock on as usual. I come back 5 hours later, turn wheel lock off and controller blows. Today I replaced these FETs and did the usual resistance tests for shorts - everything looked fine as far as I could tell. I plug power to the controller...
  22. S

    What do you think of my clamping dropouts?

    Just finished these little guys. :D Hoping they'll hold my motor in place better than my previous clamping design (below)
  23. S

    Adding more FETs to underside of board?

    For example, taking a sensorless 6FET and adding an additional 6FETs in parallel under the board (lots of amps without the trouble that hall sensors bring :D) Or the same for a sensored 12FET and turning it into a 24FET controller! ..of course you'd also add a heatsink across all of them. Would...
  24. S

    My frame shows 85 volts.

    Two days ago I went riding and it started snowing. My bike was outside, and when I got to it a few hours later... the wheel stuttered. First though: water got into motor and halls died. Later that day when bike was dried up, it worked. Skipping to today... I went riding in the snow and after...
  25. S

    Your battery packs - picture thread!

    What's everyone's ebike battery look like? Here's mine! :D Oh, and here's how it sits on my bike (few different versions shown): Turnigy 6cell 5Ah 20C packs x12 (24 cells in series, 15Ah rated total) Features: -Anderson connectors for main power outputs (x2) -Ignition + wheel lock...
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