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  1. H

    bluetooth BMS?

    Judging by the size of them, they are what create the voltage divider from wherever pack voltage is being pulled from, to send through the regulator. Same value you found in another pic should be correct. I have the same BMS. But it seems everytime someone asks a question about this specific...
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    Connecting EM3EV to A2B. Reuse parts?

    Sounds good, its great to hear it working! You could run a DC power meter instead of a battery gauge, probably much more useful tbh. bayite DC 6.5-100V 0-100A LCD Display Digital Current Voltage Power Energy Meter Multimeter Ammeter Voltmeter with 100A Current Shunt...
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    Pas issue

    That provides a ton of insight as I was sure there were other ways to do PAS but I wasnt sure what other types of signals could be sent out. Id be leery of a pas sensor that fires the same pulse forwards or backwards as it reminds me of when I mounted my PAS on the wrong side of my bike, it...
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    sw900 display

    On the sw900 with it unplugged from anything, place your multimeter in continuity mode and check between the red and blue pins on its harness, if it beeps then you have a short somewhere in the motor enable circuit on the display.
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    Pas issue

    Thank you amberwolf for chiming in. T'was a typo, had a secondary train of thought going on for testing a different thing. While they are not universal, a three wire pas is typically a hall sensor due to the engineering limitations of the package size, no? 3 pins 1 for 5v, one for Sense, and...
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    Shunt resistor connections for aux.

    Sequence when current over a shunt is read is usually : Voltage flows from battery Through shunt Out to controller. So if you want them to be a part of your measurement of wattage draw(for accurate measurement of battery current) you connect the negatives in parallel with your load, i.e. the...
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    Pas issue

    Yeah 3 pin pas should work. Just make sure red to red black to black and color to color and you should be good. Seems like its a hall sense one.
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    Your Creation's Before & After Pics

    Before: After: 2019 Gravity Bullseye Monster FIVE with a few upgrades. I blew the motor after shunt modding an e bikeling controller. Kit is a voilamart fat 1000w kit, running at 3.7kw under full tilt. Current rewind on motor is 13x4 24ga temco 200c wire terminated WYE. Battery is 4x...
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    Connecting EM3EV to A2B. Reuse parts?

    I found this thread which may help some, for a different battery from the same manufacturer. https://endless-sphere.com/forums/viewtopic.php?t=87115
  10. H

    Connecting EM3EV to A2B. Reuse parts?

    I checked the images you sent, Thanks for providing them! it looks like a group of diodes, ill have to check some things out, see if I can find a generic BMS that has a similar circuit to the one you'd have. If I were in your position, Id Hail Mary it and just connect the em3ev battery straight...
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    Pas issue

    yeah, so if you send us a pic of your PAS connector we can probably guess the pinout, usually, red is 5v, black is GND and white/green/blue/blurple (or any other color literally) is the sense wire. A few steps. - Make sure PAS is plugged in - turn controller on - get multimeter and put in...
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    Connecting EM3EV to A2B. Reuse parts?

    Can we get a clearer close up of where that JST connector goes into the board? preferably with flash? that whole blue board looks like a BMS board with per cell balancing but it almost has too many components, maybe due to some communication things. they probably arent: - current draw -...
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    TSDZ2 + Larry vs Harry Bullitt (2017)

    Can you take some more pictures, I cant tell is from a slightly off angle but it looks about 5 degrees down from where the centerline of the issue is. Based off of what I see, youd have to shave the outer casing. this is WAYYYY more desirable than shaving the frame. see my red lines on your...
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    S12S broke - replace with S12SH or S12SN?

    I dont have any experience with CST specifically, but I can kind of provide some insight. It sounds like you are discussing a Mid drive. They usually spin faster. so, as long as you don't lug the motor, 30a should be fine. Rarely do you see motor specs change drastically, without a name to...
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    Stripped Bafang connector - where can i find spares?

    Hey, Found a starting point for you. I typed in JST dual row into google and got a link to a company in china that sells em. http://www.fleconn-china.com/productinfo-298-2.5mm-Pitch-JST-XAD-XADR-Dual-Row-Wire-to-Board-Connector-Harness.html now, you need a set of calipers off of Amazon(if you...
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    Improve Yamaha motor efficiency by better windings

    Its pretty far from here to the Netherlands im in Washington DC. Low stator tooth count sounds easy enough to rewind, if you could get a diameter on the wire it would be optimal. I worry about the various white parts seen throughout as they appear to be Nylon but im unsure based off the photos...
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    only 12 motors for fat bikes & all are bad choices

    If all else fails, one thing I've learned building and blowing my hub motor a few times has been to go with the best documented option. CYC mid drives seem powerful, cost effective for what you are looking for, and the main product support (the non company based) is the real contributor to...
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