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Author Topic: PIR motion sensor connectivity issues  (Read 435 times)
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Hello all,
I have this PIR sensor which works with a N.C relay and from my understanding opens up when the motion sensor is triggered. I am currently building a small security system for a project. I was trying to send a digital 1 from the digital output from the arduino across the relay and connected the output of the relay to an input on the arduino and programmed it to read a digital 0 or 1. However it is not working, i cannot get a proper signal across the relay which should just be a short I believe when its N.C. Any suggestions?

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This is what you need.

The resistor should be 10k ish.

* cct.jpg (35.73 KB, 640x622 - viewed 15 times.)

My New Arduino Book:

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