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Thread: Low power USB

  1. #1
    Senior Member
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    Dec 2013
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    Low power USB

    Hi all,

    I have Teensy 3.1 USB communication working from 3x AAA batteries in series (4.5v), is there any trick to make it work from 3v like there is with the teensy 2 (connect UCAP to 3v)?

    Perhaps bypassing the regulator input and going straight to Vin?

    Many thanks
    Last edited by mattomatto; 05-13-2016 at 01:58 PM.

  2. #2
    Senior Member
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    Dec 2013
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    131
    I tried bypassing the regulator and it works. Am I likely to have any issues doing this?
    Thanks

  3. #3
    Senior Member pictographer's Avatar
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    The "trick" is the built-in regulator will accept lower voltage, but you may not have USB after some point. You can power the T3.1 through the 3.3v input, but you run a greater risk of destroying the Teensy. There's been a ton of discussion of power including your question, so you might try searching.

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