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  1. TommyCat

    Does this imaginary voltmeter that I want exist?

    Been enjoying your thread and creativity on repurposing the meter. When I was looking at the different analog meters, in my mind I would consider getting one with a working voltage of 0 to 100 volts. Then slightly modify the face to represent 0 to 100 percent of battery charge. Coloring in the...
  2. TommyCat

    Need help! Any advice is appreciated.

    Hi macp444, I recommend you look over this thread on testing a BLDC‘s wiring and sensors with a multi-meter… It may point to something missed, or misunderstood. Testing BLDC motor's Phase Wiring - Hall Sensors and Wiring. - Electricbike.com Ebike Forum Regards, T.C.
  3. TommyCat

    Whistling whine from Golden motor front hub (damaged controller?)

    Hi Joaqthru, I'm a Magic Pie V5 rider... You are working on a Version 2 for sure. You may be able to get a used controller for it if lucky. Or that motor may be a good candidate for an external mounted replacement, but with a fair amount of work. To help with the damage assessment I'm thinking...
  4. TommyCat

    Grinding noise in hub motor

    May be worth checking... verify that you have good continuity between the hall sensor terminals and where the new wiring will go on the pristine solder points. (Nothing scuffed up or damaged in the traces.) Have all the sensors fronts (with the part stamp) facing the magnets. All the 5V legs...
  5. TommyCat

    Grinding noise in hub motor

    For inspiration. :)
  6. TommyCat

    Grinding noise in hub motor

    Hi Cyclomania, It appears to me, that motor board can be set up to handle hall sensors, but at this time does not. A good clue is the numbers of wires coming off the pcb. A sensored BLDC motor will have a total of at least 5 wires going to the controller’s hall sensor plug. You have 3, with the...
  7. TommyCat

    Help with rewiring throttle to controller

    Shouldn't have any problems after reading this... Guide to Hall Sensor Throttle operation, testing, and modification. - Electricbike.com Ebike Forum Regards, T.C.
  8. TommyCat

    Analog electronic soft start E-bike throttle solution.

    Right now I have an exponential ramp circuit. (Typical R/C type plotj Your linear ramp circuit. And a logarithmic ramp by modifying yours, that was my goal to achieve in my mind. Granted, one might not be able to tell much if any difference between the three. But will see. Is R1 just to dump...
  9. TommyCat

    Analog electronic soft start E-bike throttle solution.

    ... Bend it like Beckham. ;) A usable circuit as modified? Delay is easily adjusted by the R7 capacitor. Working on a potentiometer model to work in LTspice. :confused:
  10. TommyCat

    Analog electronic soft start E-bike throttle solution.

    This looks VERY interesting. Bit above my knowledge level but going to study it. Thank you.
  11. TommyCat

    Analog electronic soft start E-bike throttle solution.

    Will definitely be looking at this op amp circuit closer, thank you both for your inputs. Recommendations for the signal input. I.E. speed sensor on the wheel with 1 rpm pulse. Or perhaps put a couple or more magnets for more signals? Or tap into a hall signal output?
  12. TommyCat

    Analog electronic soft start E-bike throttle solution.

    Yes, I have a sample and hold circuit and a D flip flop for its actuation/release by pressing a momentary push button switch. It's the first part... speed pulse integration with the components you mention that I could use help with. .
  13. TommyCat

    Analog electronic soft start E-bike throttle solution.

    You’ve talked me out of the simulation for now. I think I’ll stick with the delay/soft start idea at this time for the issue of excessive start power at the beginning of throttle twist. Do you have a cruise circuit that will try to maintain SPEED at a certain throttle voltage output? Like an...
  14. TommyCat

    [Calling all experts!] BBSHD: error30 "immediatly" occurred after I wrongly connected "2-pin" brake sensor expected 3-pin.

  15. TommyCat

    Analog electronic soft start E-bike throttle solution.

    Thank you for the detailed explanation, My take away is that current controlled mimics a gas powered bike. For fun will try to “simulate” your circuit. Look for your addition to the thread soon.
  16. TommyCat

    Analog electronic soft start E-bike throttle solution.

    Hey, great to have you back. I think we can agree that a voltage profile on a troublesome throttle would be a very helpful place to start before making changes. You bring out several good points. Do you think that a throttle soft start or delay feature would still be advantageous for high...
  17. TommyCat

    Analog electronic soft start E-bike throttle solution.

    Hiyas amberwolf, Thanks for your input, and the links. Not really interested on a current modifying solution, just want to control the voltage output of the throttle as desired. In a strictly analog way, no programming or the like. In my novice way I was also thinking of a resistive...
  18. TommyCat

    Analog electronic soft start E-bike throttle solution.

    This is right on the money! Don't quite follow you here... could you expand on this?
  19. TommyCat

    Analog electronic soft start E-bike throttle solution.

    Looking forward to your solution! Are you using a circuit simulator? If I can help in any way, let me know. I appreciate the fact that you CAN change the graphics. My problem is I keep running into not finding the components in the library to insert in the circuit. But a very impressive free...
  20. TommyCat

    Analog electronic soft start E-bike throttle solution.

    I think you could get there with more resistance on R5. And you have a great linear output. But to be particular, I'm shooting for a profile plot that looks more like this... very gradual at start and increasing to catch up.
  21. TommyCat

    Analog electronic soft start E-bike throttle solution.

    Stable LTspice simulation .asc file. Voltage probe on Vout for plot simulation above.
  22. TommyCat

    Analog electronic soft start E-bike throttle solution.

    Good call. 1K was just a tad strong with a bit of unwanted voltage drop hang near the bottom. But a 800-ohm resistor makes it work perfectly! Well done. (y)
  23. TommyCat

    Analog electronic soft start E-bike throttle solution.

    Thanks for the input. Tried to make the plots look easier to see. My goal was to be able to change the delay time between 0 and 2 seconds, just to see. But I discovered instability when the R5 resistance is less than 70K or greater than 120K. 150K gave a 1/2 second delay for reference... I...
  24. TommyCat

    Hall sensor issue, after switch

    Great way to start the day! Job well done and thanks for posting the result! :)
  25. TommyCat

    Analog electronic soft start E-bike throttle solution.

    Your op amp wasn't available, and just put in a 70K resistor for the pot where it became stable... this is the resulting plot. The input variable voltage is a custom voltage mapping that mimics possible throttle voltage outputs. (Sharply changes... but gives insight to how the circuit reacts...)...
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