Forum Rule: Always post complete source code & details to reproduce any issue!
Results 1 to 4 of 4

Thread: Teensy current requirements?

  1. #1
    Junior Member
    Join Date
    Jan 2021
    Posts
    1

    Teensy current requirements?

    Hello All,

    Has anyone posted the current draw required by the various Teensy platforms? I have a 240 mAh battery for my project and I believe that the Teensy 3.2 that I am currently using requires too much of the battery and does not leave enough current for the sensors and motors I am trying to drive. I am looking for a lower current Teensy platform.

    Thanks,

    Z

  2. #2
    Senior Member+ defragster's Avatar
    Join Date
    Feb 2015
    Posts
    15,105
    There have been some measurements posted in table form.

    I find a graph on this page that gives some idea : github.com/manitou48/teensy4/blob/master/coremarka.png

    A T_3.2 at 96 MHz looks to be under 40 mA. It can go under 30 mA at lower speeds it seems.

    Lowest power consuming Teensy is the LC.

    With a DMM that current in use could be tested easily for the case at hand.

  3. #3
    Senior Member
    Join Date
    Apr 2014
    Location
    Germany
    Posts
    9,345
    I bet your motors draw much much more current.

    With a DMM you could measure it..

  4. #4
    Senior Member
    Join Date
    Jul 2020
    Posts
    1,253
    Quote Originally Posted by Zeus View Post
    Hello All,

    Has anyone posted the current draw required by the various Teensy platforms? I have a 240 mAh battery for my project and I believe that the Teensy 3.2 that I am currently using requires too much of the battery and does not leave enough current for the sensors and motors I am trying to drive. I am looking for a lower current Teensy platform.

    Thanks,

    Z
    240mAh is a capacity rating, not a current rating. To figure out if the battery can source enough current
    you need to know the current rating.

    For many batteries you'll see a C value, indicating the ratio between max current and capacity (in Ah).

    A 10C 240mAh battery would be able to source 10 x 240mA, ie 2.4A.
    A 5C 240mAh battery would be able to source 5 x 240mA, ie 1.2A.

    Normally you'd avoid straining a battery to its maximum current rating as this both shortens the lifetime
    of the battery and reduces the effective capacity.

Posting Permissions

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