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- Create Date October 24, 2022
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Add PIR To Sound Card
If you have the MP3 sound card without Motion Sensing here's a wiring diagram to get a PIR connected so sound will play when motion is detected.
This type of wiring is required as the sound card sound pins are looking for a LOW signal to activate. The PIR sensor outputs a HIGH when triggered so if wired directly the sound would always play and only stop when motion is detected, the oposite of what we want. This wiring setup uses and extra relay that is triggered by the PIR which in turn triggers the sound card.
We now stock an all-in-one MP3 Sound Card with Motion Sensor that eliminates all this, but if you have one of the other boards this will convert it.
