🤖Have you ever tried Chat.M5Stack.com before asking??😎
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Register
  • Login
M5Stack Community
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Register
  • Login

Stamp-S3 randomly starts drawing 500mA.

Modules
3
5
2.9k
Loading More Posts
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • B
    Bram
    last edited by Aug 30, 2023, 10:40 PM

    My Stamp-S3 seems to work fine, but regularly starts to suddenly draw 500mA for no apparent reason.

    This makes the unit too hot to touch.

    Even if I disconnect ALL pins, it still keeps drawing 500mA from the USB port.
    Only after unplugging, and reconnecting to USB, the powerdraw goes back to normal, at 10mA or so.

    Has anyone else seen the Stamp-S3 turn extremely hot at random times?

    M 1 Reply Last reply Aug 31, 2023, 2:19 AM Reply Quote 0
    • M
      mtylerjr @Bram
      last edited by mtylerjr Aug 31, 2023, 10:20 AM Aug 31, 2023, 2:19 AM

      @bram Did you self-solder connectors and pins?

      Ive seen this a few times with tiny solder bridges to vcc or gnd that varied when they heated up/cooled down and acted exactly that way. (Or similarly when I took too long soldering pins, and damaged an internal component from the heat of the pin/solder pad)

      B 2 Replies Last reply Aug 31, 2023, 4:46 AM Reply Quote 2
      • B
        Bram @mtylerjr
        last edited by Aug 31, 2023, 4:46 AM

        @mtylerjr Yes, I soldered the 2.54mm headers. I will check them again under my microscope.

        I also see a weird 4.6V on EN pin, whereas the VCC is a perfect 3.30V and the power is a 5.01V.

        1 Reply Last reply Reply Quote 0
        • B
          Bram @mtylerjr
          last edited by Bram Aug 31, 2023, 1:05 PM Aug 31, 2023, 5:04 AM

          @mtylerjr Thank you for that great diagnosis!

          I checked, and yes, I had a short.

          I fixed it, and hopefully I will not see the 0.5A power draw any more. I still have the 4.6V on EN pin, though, which I think is weird.

          short

          T 1 Reply Last reply Aug 31, 2023, 3:56 PM Reply Quote 1
          • T
            teastain @Bram
            last edited by Aug 31, 2023, 3:56 PM

            @bram The EN is the Reset input and is pulled up normally, and brought down to reset the ESP.
            While it does seem odd that it is 5V, mine does the same thing!
            My (ahem) LilyGO T-Display S3 Reset pin is at 3.3, which makes more sense.
            -Terry

            Cheers, Terry!

            100% M5Stack addict with several drawers full of product!

            1 Reply Last reply Reply Quote 1
            1 out of 5
            • First post
              1/5
              Last post