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Thread: 3.6 volt motor usb

  1. #11
    SOB Fettler xmastree's Avatar
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    Default Re: 3.6 volt motor usb

    Quote Originally Posted by Cannibal23 View Post
    is this from the diffrence in current from my power supply and whats available from the batteries ?
    Yes. the PSU can provide a lot more current than three button cells.
    Since you have a meter, try measuring the voltage while the motor is running off the batteries. I suspect it will be lower than 3.6V.
    Then connect it to the PSU and measure the current it draws(I assume you know how to go about this.) This will give you an idea about what to use as a speed controller if you want to go down that route.

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  2. #12
    Fox Furry crenn's Avatar
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    Default Re: 3.6 volt motor usb

    What is the resistance for the armature winding?
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  3. #13
    some custom title eh Cannibal23's Avatar
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    Default Re: 3.6 volt motor usb

    Cren i havent the foggiest idea. wish i did.


    Xmas thats kind of what i figured. i will try to find a way to measure the voltage when running from battery. im not familier with how to measure the current though. i imagine there is a setting on my meter to find taht out. is it done diffrently then measuring the voltage?
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  4. #14
    SOB Fettler xmastree's Avatar
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    Default Re: 3.6 volt motor usb

    Here ya go:

    http://www.electronics-radio.com/art...re-current.php

    DO NOT set the meter on current then connect it across the supply, particularly the PSU. It will go bang.

    Quote Originally Posted by aintnothang View Post
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  5. #15
    some custom title eh Cannibal23's Avatar
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    Default Re: 3.6 volt motor usb

    got this device all hooked up with 2 of those diodes on the positive lead. took a busted usb mouse cracked it open and stole the cable. as a point of interest the voltage pins on a usb connector are the 2 outer most pins. hooked this all up and it works like a charm. was in too much of a rush to see if it would work to measure out the current. will have to do that later when i choose to put a control nob or other such electronics on here with it. the only thing that concerns me a little is that the motor does get warm. its not untouchably hot or anything but i dont really want to burn it out. is that the current or the voltage? if its the voltage i guess i could get another of those diodes and hook it up with the rest.
    - The stone knows not why the chistle cleves it
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    - Curse not thine evil fate
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  6. #16
    SOB Fettler xmastree's Avatar
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    Default Re: 3.6 volt motor usb

    Quote Originally Posted by Cannibal23 View Post
    the only thing that concerns me a little is that the motor does get warm. its not untouchably hot or anything but i dont really want to burn it out. is that the current or the voltage?
    It's both. The power consumed is given out as heat, and power in Watts is Voltage x Current.
    Don't worry about it, it's supposed to get slightly warm.

    Quote Originally Posted by aintnothang View Post
    Think of a way to simulate a real bullet hole, like shooting it.

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