• Recent
  • Tags
  • Unsolved
  • Solved
  • MagicMirror² Repository
  • Documentation
  • 3rd-Party-Modules
  • Donate
  • Discord
  • Register
  • Login
MagicMirror Forum
  • Recent
  • Tags
  • Unsolved
  • Solved
  • MagicMirror² Repository
  • Documentation
  • 3rd-Party-Modules
  • Donate
  • Discord
  • Register
  • Login
A New Chapter for MagicMirror: The Community Takes the Lead
Read the statement by Michael Teeuw here.

PIR Sensor: false positive detections

Scheduled Pinned Locked Moved Hardware
18 Posts 6 Posters 5.9k Views 6 Watching
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.
  • M Offline
    MZ-BER @thgmirror
    last edited by Nov 22, 2021, 6:50 PM

    @thgmirror Yep, that is what I’ll do next. Already ordered a starter kit with resistors, inductors and capacitors.

    I also noticed, even if I added the ferrite beat, that the sensor recevied every minute excact on the second a signal

    c06e06b8-0380-4a64-a040-2ef29f7c68ee-image.png

    1 Reply Last reply Reply Quote 0
    • F Offline
      Fozi Project Sponsor @thgmirror
      last edited by Nov 23, 2021, 7:43 AM

      @thgmirror said in PIR Sensor: false positive detections:

      It is not a step-down/up … it is called Pull-Up, resp Pull-Down.

      Are you dealing with 3D printing? Just asking, because step-down converters are quite popular for modding cooling fans in that hobby :beaming_face_with_smiling_eyes:

      HowTo: Replace PIR Sensor with a RCWL-0516 Microwave Sensor

      T 1 Reply Last reply Nov 23, 2021, 9:13 AM Reply Quote 0
      • T Offline
        thgmirror @Fozi
        last edited by Nov 23, 2021, 9:13 AM

        @fozi no, currently no 3D-printing, but may be in the future:-)

        1 Reply Last reply Reply Quote 0
        • Z Offline
          Zoltan @MZ-BER
          last edited by Dec 3, 2021, 4:00 PM

          @mz-ber
          Apologies for the late response
          1, 2 and 3 is capacitors yes
          4 & 5 is inductors or coils. The rule is a Capacitor conduct high frequency but block low frequency. The coil or inductor is doing the opposite, and conduct low frequency but block high frequency. The whole idea is to short circuit any spikes on the power line as well as the data line to ground. This is quite a big low pass filter and you can make it smaller with less components.
          Remove 1
          Leave 4 & 2
          Replace 5 with a wire

          6 is a resister yes. 10 Kilo Ohm 1/4 watt is perfect

          The coils you can strip out of an old circuit board. If it looks like a wire wind coil and it measure less than 3 ohm then its perfect

          1 Reply Last reply Reply Quote 0
          • Z Offline
            Zoltan @MZ-BER
            last edited by Dec 3, 2021, 4:07 PM

            @mz-ber
            The controller board with the low pass filter
            Screenshot_20211203-180312_Gallery.jpg

            1 Reply Last reply Reply Quote 0
            • 1
            • 2
            • 2 / 2
            • First post
              Last post
            Enjoying MagicMirror? Please consider a donation!
            MagicMirror created by Michael Teeuw.
            Forum managed by Sam, technical setup by Karsten.
            This forum is using NodeBB as its core | Contributors
            Contact | Privacy Policy