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    Natezimmer

    @Natezimmer

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    Latest posts made by Natezimmer

    • RE: Motion Sensor triggering on its own

      This is an issue i've been fighting for awhile as well. In industry, i've encountered PIR modules / old sensors can be susceptible to high freq interference. E.g. I have WiFi on my PI.

      1. Ensure the PIR is a 6in+ physical distance from your dev board / any radios. This helps.

      2. Ensure no high freq noise can couple on any of the 3 wires connected to the PIR

      0_1560114349879_c4ca7289-112c-4d3e-88c8-9aeea62ec2b9-image.png

      I did #2 via a PI filter. Inductors + a cap. Ideally i'd have caps at both ends of high and low values for both frequency contents. The signal line itself can couple noise so ideally a ferrite bead + resistor to snub any type of noise. I've had to employ similar strategies with other sensors to deal w/ interference issues.

      posted in Troubleshooting
      Natezimmer
      Natezimmer