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  1. #1
    RC Turnbuckle Jr. mwe-maxxowner's Avatar
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    can an esc fan be powered by a balance plug?

    Could I use the balance port on a lipo battery to run an ESC fan? This way they could get more voltage, and it would be easier to run two fans.
    460, straightpipes, buried throttle, nuff said :D

  2. #2
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    Yes, it is possible...
    Keep in mind that the fans you currently have may only be rated for 5 volts and that running them at higher voltages could burn them out quite quickly.
    Whatever it is I just said... I could be wrong.

  3. #3
    RC Turnbuckle Jr. mwe-maxxowner's Avatar
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    I used to run a 12v fan at full 16.8v in my emaxx . I might use a 12 volt fan, or just over volt these and see how long they last. I guess I can get the proper connections to solder to the fans?
    460, straightpipes, buried throttle, nuff said :D

  4. #4
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    Yes... an extension will have all the connectors pre-soldered and also the wire.

    Also, be sure to pull full pack voltage... you don't want to be severely unbalancing your cells all the time.

    12>16 is not that much... a 25% increase.
    But, if you power a 5 volt fan with a 2S pack (5>8) it would be a 37% increase.
    Last edited by Jimmie Neutron; 10-20-2013 at 09:38 PM.
    Whatever it is I just said... I could be wrong.

  5. #5
    RC Turnbuckle Jr. mwe-maxxowner's Avatar
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    I understand this. I have a lot I bought of 5v fans off eBay for cheap. They don't do much on 5v. If I burn through them I may see if I can locate some 12v fans that fit okay.

    Thanks a lot for the advice and help!
    460, straightpipes, buried throttle, nuff said :D

  6. #6
    RC Turnbuckle Jr. mwe-maxxowner's Avatar
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    I was doing some digging online, and found a similar question about powering a high powered Rx in this manner.

    It was stated on that site that the balance pins on a 2s pack are:

    Pin 1-positive cell one

    Pin two-negative cell one/positive cell two

    Pin tres-negative cell two

    He was informed that, to pull from the full lipo pack, to tap into pin one and pin three to power his Rx.

    I want to set up for 2s, 3s, and 4s packs on my various vehicles. Can I pull full pack power on any lilo by tapping into the first and last pins on the pack? I.e., will pulling pin one and pin four give me power from each cell of a 3s pack to a fan?

    Or do I have to pull from pin 1 and pin 4, and jump pins two and three?

    I understand I am risking burning up fans. But I have lots of spare fans, and 12v fans for 3+s.
    460, straightpipes, buried throttle, nuff said :D

  7. #7
    RC Turnbuckle Jr. mwe-maxxowner's Avatar
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    Maybe I need to look into soldering directly into my ESC wires. I'm just looking to avoid that because I want there to be a connector to the fan(s) and I'm a sloppy solderer. I think having only a 30 watt iron is why though.
    460, straightpipes, buried throttle, nuff said :D

  8. #8
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    I have a diagram I'll post up later... but it is the two outside wires for pack voltage on all cell counts of JST-XH connectors.

    You can solder into the ESC connector and still have a connector for the fan. JST connectors are two pin, negative and positive. Solder that to the connector and the opposite to the fan.

    I sucked at soldering until I got a 60 watt iron... and I improved even more with a station.
    Whatever it is I just said... I could be wrong.

  9. #9
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    Whatever it is I just said... I could be wrong.

  10. #10
    RC Qualifier
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    I might be missing something, but wouldn't it be easier and safer to get a five channel receiver and plug the fans into it?

  11. #11
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    That depends on if 6v is enough, if your receiver has any open slots, and if you are having brown outs due to the added amperage of a fan.
    Whatever it is I just said... I could be wrong.

  12. #12
    RC Turnbuckle Jr. mwe-maxxowner's Avatar
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    Thank you so much Mr neutron. I bought a lot of 5v fans off eBay that barely flow anything on 5v. So they are useless without more voltage. They blow nice off 7.2v though. And I ha e some 12v fans I want to use on my slash with HV maxx. I used to use that system with 12v fans in my emaxx or it would overheat.

    That's why I wanna look into tapping directly into my batteries.
    460, straightpipes, buried throttle, nuff said :D

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