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  1. OlderThanDirt

    CA -- Current Leakage?

    My controller draws 60 mA. It's possible that is what your are measuring. My CA draws about 7 mA.
  2. OlderThanDirt

    diagnosing battery problem...

    In instances when I have accidentally run my battery down to LVC, my charger refuses to charge also. It seems to have an internal protective circuit to guard against output short-circuits. The fix is to momentarily connect the charger to the battery output terminals (not the charging terminals)...
  3. OlderThanDirt

    spark resistor help

    I blew a 1-watt spark resistor once when I accidentally shorted the battery output through it. It burned up in a flash of smoke. Twenty-five watts was a little above the resistor rating!
  4. OlderThanDirt

    spark resistor help

    The spark is determined by the controller capacitor and the battery voltage. The amp-hour capacity of the battery doesn't matter. A 150-ohm 1 watt resistor will be fine. Be sure to turn off the controller power before connecting the battery (usually the thin red wire from the controller that...
  5. OlderThanDirt

    My 36V vpower battery does not charge.

    In instances when I have accidentally run my battery down to LVC, my charger refuses to charge also. It seems to have an internal protective circuit to guard against output short-circuits. The fix is to momentarily connect the charger to the battery output terminals (not the charging...
  6. OlderThanDirt

    CA 2.23 setting for wheel size.

    I like to have accurate speed and distance figures, so I measure my own personal wheel setting. This how I do it: 1. On a quiet piece of smooth road or a long driveway, measure off a 528-foot distance. 2. Inflate your tire to your normal ride pressure. 3. Set the CA distance to 0.00 and...
  7. OlderThanDirt

    cycle analyst speed error ?

    Stefan, If your CA 2.2 is a stand-alone version, check your spoke magnet. I had a problem that was very similar to yours: the CA it sensed crazy speed and cut off the system when I tried to ride. I found that the magnet had gotten rotated 90 degrees from where it should be on the spoke and...
  8. OlderThanDirt

    attempting to use a simple led voltage meter

    You need to factor in the current drawn by the meter through your voltage divider. It looks like about 2.5mA will cause the voltage drop you're seeing. If the current into the meter is indeed 2.5 mA, I'd suggest a 5K/10K voltage divider to apply about half of the 53V battery voltage to the...
  9. OlderThanDirt

    Hobbyking LiFeP04 ?

    Cellman built some custom batteries for me last year (51 V, 11.2 Ah) in a longer, narrower configuration than the usual size so they would fit beneath the seat of my recumbent. Additional cost was $50 per battery.
  10. OlderThanDirt

    Cycle Analyst Limiting issue

    I've been using the CA limiting feature for over two years with no problem. Is the diode wired correctly? The cathode should go to the CA (the lead closest to the stripe on the diode body) and the anode to the resistor-controller junction. The input resistance of the controller throttle input...
  11. OlderThanDirt

    Location of Watt Meter in Circuit??

    Yes, between battery and controller.
  12. OlderThanDirt

    Changing from twist shift to trigger shift

    This is what I use on my recumbent: a half-twist throttle on the left hand with bar-end shifter for the front derailleur. Perhaps it might work for you as well. http://endless-sphere.com/forums/viewtopic.php?f=2&t=29489&p=425922&hilit=olderthandirt#p425690
  13. OlderThanDirt

    Cycle Analyst / Logomatic software UPDATED!

    I apologize for taking so long to respond to your problem. I've been on a trip. If you ZIP your data txt file, you should be able to send it to me via PM. I'll look at it and see if there's anything wrong there. Here is the problem file "stdole2.tlb." You can try loading it manually. Place...
  14. OlderThanDirt

    Why? Battery connection has an extra green line.

    You need to use the green wire every time you connect the controller to the battery if you want to avoid a spark. If you change batteries (unless it's from Cellman), it is unlikely that it will have an incorporated spark-suppression resistor and you'll need to install one. It can either be on...
  15. OlderThanDirt

    Why? Battery connection has an extra green line.

    There is a spark-arrest resistor inside the battery/BMS (usually 200-ohm, 2 Watt). What you do is wire a green wire of your own to controller fat red positive lead (if your controller didn't come with one). Put a connector on it to match the one on the battery. When you connect the battery to...
  16. OlderThanDirt

    Cycle Analyst / Logomatic software UPDATED!

    Send me a copy of your data file via PM and I'll check it out.
  17. OlderThanDirt

    #%&*&!! battery disconnect. About ready to give up

    If your spark-suppressor circuit only charges the controller capacitors to 35V on an 80V+ system, than, as amberwolf says, there's still a lot of voltage remaining where the resistor won't have any effect. That's about the same as on my 51V system with NO resistor, which produces a pretty hefty...
  18. OlderThanDirt

    Adjusting King Power chargers

    In response to daygon's original post: 1. No 2. This is normal. When you connect a discharged battery to a charger, it'll go into its CC (constant current) mode, the voltage will drop a few volts and the current will be at its maximum value (in your case, 4A). When the the BMS detects that...
  19. OlderThanDirt

    To: EP/KP series charger users who use them for LiFePO4

    A large number of photos were lost sometime last year and more were lost in the recent change of servers. Here's a photo of my 360W 38V 8A charger showing the transistor (circled in red) on the daughter board that stops the BMS from balancing a LiFePO4 battery pack. If your charger has this...
  20. OlderThanDirt

    Stand alone Cycle analyst power and throttle wiring

    The CA signal at the Th pad doesn't do anything UNTIL the you exceed the limit that you have programmed in the CA. Then it pulls current through the resistor, dropping the throttle voltage sent to the controller. The CA does this dynamically to hold the limit you have set. The schematic is...
  21. OlderThanDirt

    My throttle kicks in at 20% only

    I'm relatively new to e-bikes, and I've only familiar with three controllers. Two of those were Infineon controllers. They do not turn the wheel until the throttle voltage is about 1.4V. The usual hall-effect throttle starts at 0.8V, so you have to twist the throttle 20% before anything...
  22. OlderThanDirt

    Planned Server Downtime, August 31st 19:30 PST

    Michael, My data logging software at http://endless-sphere.com/forums/viewtopic.php?f=2&t=17458 appears to have gone missing again. When will it be safe to upload it? Thanks for all the hard work!
  23. OlderThanDirt

    Any Way Of Testing A Motor/Controller Without Throttle???

    If you have a potentiometer, somewhere around 5K-100Kohm, connect it to the controller throttle cable as follows: Connect the top lead of the pot to the 5V line (usually red), the bottom one to ground (usually black), and the center lead of the pot to the signal lead (usually white, green...
  24. OlderThanDirt

    Throttle match question

    This a bit confusing: it looks like you might have a white wire mixed up in your description. My best guess: Red is 5V and, most likely, orange is ground. To be sure, hook up your battery to the controller and then use your voltmeter to measure between red and orange: you should see 5V...
  25. OlderThanDirt

    48v Battery issue

    Your battery looks OK since the individual cell groups are correct. The BMS may be at fault. Can you disconnect the BMS and then try hooking up the battery to the controller? Another thought: do you get a big spark when you connect the battery to the controller? That means a large...
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