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  1. L

    How do I determine if I have an S-Series controller

    Hello all, I damaged the lcd on my KT-LCD3 display and need to replace it. I found this one: https://bmsbattery.com/ebike-kit/670-s-lcd3-lcd-meter-for-s-series-controlers-ebike-kit.html But it requires a S-series controller, and I cannot positively identify my controller as an s-series...
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    Controller blown, need advice

    Thanks for the feedback! I ordered a new controller, the bike is back in action. Upon closer inspection, a couple of transistors on the failed board had melted into a gooey glob...
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    Controller blown, need advice

    Hello, I was riding yesterday and I stopped to pull my bike around a locked gate. When I got back to the road my bike would not power on. The battery was 2/3 charged. I had a multimeter with me; I checked the input power wires to the controller and got a direct short reading between the wires...
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    Conhismotor LCD Display

    my setup does the same thing... no speed when throttle or PAS is not engaged, ie coasting. I believe that when this happens, the controller is not powering the halls or is not reading the halls. Looks like it does use a separate hall (white wire) sensor. each revolution of the motor = 1 wheel...
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    48v controller w/ 36v battery pack Low Voltage Cutoff

    Well, I decided to order the correct 36v controller and forego the mod. I realized that as much as I love tinkering and desire to learn all about the technology around e-bikes my time is limited, and other projects are higher priority. Seems like there's always more to do and the days go by...
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    48v controller w/ 36v battery pack Low Voltage Cutoff

    Thanks, When I have time I will put it on the bench and see if I can identify the LVC circuit and perform some measurements. Will post when I am done.
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    48v controller w/ 36v battery pack Low Voltage Cutoff

    Those three resistors to the left of the power resistors (thanks) are SMD 1K ohm resistors wired in series.
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    48v controller w/ 36v battery pack Low Voltage Cutoff

    Thanks for the info! Here are pics of the controller PCB. I believe, after reviewing the links, that the LVC is set by R01A, B, C. They are all 1K ohm currently. Just need to know which resistors to change and their values for 36v pack, to maybe +-32v LVC (or whatever is correct). I'm new...
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    48v controller w/ 36v battery pack Low Voltage Cutoff

    I have a 36v 750w hub motor with a 36v LiFePO4 20AH Battery Pack. I ordered a controller, but was shipped a 48v controller instead of a 36v controller. I think the controller should work with the 36v battery, but the cutoff voltage must be higher than the 36v battery pack can provide. Otherwise...
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