Forum Rule: Always post complete source code & details to reproduce any issue!
Results 1 to 3 of 3

Thread: Power Supply and other questions for Teensy 3, Motor, LCD, and Ethernet

  1. #1
    Junior Member
    Join Date
    Jan 2013
    Posts
    1

    Power Supply and other questions for Teensy 3, Motor, LCD, and Ethernet

    I want to power the Teensy 3, wiz820io, a 5V 16x2 LCD and a 6V motor from one battery supply. I'm not sure which battery to use. Could I use 6xEnergizer AA rechargeable NiMH batteries?

    Can I use one 5V regulator for the Teensy3 and LCD? Will I need a 3.3V regulator from the power to the Wiz820io since it requires 120mA?

    Will the motor work off of 3.3V PWM, or will I need this?

    http://forum.pjrc.com/threads/1840-C...highlight=pump

    Finally am I better off powering the motor from a different supply (pain)?
    Last edited by ahriman; 01-13-2013 at 11:57 PM.

  2. #2
    Quote Originally Posted by ahriman View Post
    I want to power the Teensy 3, wiz820io, a 5V 16x2 LCD and a 6V motor from one battery supply. I'm not sure which battery to use. Could I use 6xEnergizer AA rechargeable NiMH batteries?

    Can I use one 5V regulator for the Teensy3 and LCD? Will I need a 3.3V regulator from the power to the Wiz820io since it requires 120mA?

    Will the motor work off of 3.3V PWM, or will I need this?

    http://forum.pjrc.com/threads/1840-C...highlight=pump

    Finally am I better off powering the motor from a different supply (pain)?
    I am not sure about your 6V motor (may have to transform that voltage after the Teensy pins) but I think this should work: http://www.ebay.com/itm/MiPow-Power-...item19d8cd758d

    It will definitely power the Teensy...now the question is will the Teensy handle all of your devices....BTW I am the biggest noob on here I am guessing so someone else may have to confirm this..

  3. #3
    IMHO you're going to need 3 voltages for your project. 3.3v 5v and 6v. It MIGHT be possible to power the wiz820io off the teensy3's 3.3v regulator, which will save you a voltage regulator in the project, but i'm not sure i'd risk it since the wiz820io datasheet says current draw is 120mA and Paul recommends no more than 100mA external load be applied to the teensy3's 3.3v pin (at least that's how I interpreted the documentation)

    So if it was up to me, I'd get a 5v boost/buck regulator to generate a constant 5V from your batteries to power the teensy3, your LCD, and an external 3.3v regulator, which will power the wiz820io, then have the motor powered directly from the batteries via a transistor.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •