I've recently got SparkFun PIR sensor ( https://www.sparkfun.com/products/8630 ) and hooked it up based on bildr instructions ( http://bildr.org/2011/06/pir_arduino/ ). The sensor wasn't reacting at all at first. Then I swapped power and alarm pins and is started detecting motion. However, now the sens…

Help with the SparkFun PIR sensor

pylon January 30, 2013, 5:04pm 4

Without a reaction on the alarm pin, how do you know the sensor is detecting motion? Is there an LED showing the motion detection on the sensor PCB?

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