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

Thread: Teensy 3.6 Voltage

  1. #1

    Teensy 3.6 Voltage

    Please forgive what may well be a very stupid question. When i test the voltage on the 3.3v pin between pins 12 and 24 i get a reading of 4.4v.
    Am i doing something wrong?
    What impact will this have on my i2c bus with 5 mcp23017s and an OLED display?

  2. #2
    Senior Member
    Join Date
    Nov 2015
    Location
    Cold hollow VT
    Posts
    169
    Where are you probing the ground at?

    Try using the upper left pin, on the Teensy, above pin-0 or the pin directly across between pins A22 and D13.

    Don't use the analog ground pin as a reference.

    Don't tie Vin to the 3.3v pins either.

    Did you solder the pins on the Teensy? Check those soldered connections.

  3. #3

    Red face

    Quote Originally Posted by grease_lighting View Post
    Where are you probing the ground at?

    Try using the upper left pin, on the Teensy, above pin-0 or the pin directly across between pins A22 and D13.

    Don't use the analog ground pin as a reference.

    Don't tie Vin to the 3.3v pins either.

    Did you solder the pins on the Teensy? Check those soldered connections.
    Thanks very much for the response. My problem was even more basic (testing the tester). I didnít notice that the battery in my multimeter was a bit tired and after replacing I get exactly 3.3 v, as expected.

Posting Permissions

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