Connecting 3 or more PIR sensors to arduino.

Projects Programming
1

Hi !

I recently started working with arduino. Actually I was was trying to connect 3 PIR and 3 led's connected with them individually. Vcc and ground is common for all PIR's , even that ground is connecting led's as well. But anode of leds and data pin of PIR's are connected with arduino from from pin d8 to d13. But when I trying to uploade the sketch , after uploading sketch only one PIR is responsive. So I think arduino is not able to drive all three PIR's. But not sure. So do I need to add transistors. Help will be appreciated.

2

First, show us the code you used to verify that statement.

Next, links to the PIR's used. And because it's you who wants answers, a schematic would be nice (please no Fritzing breadboard mess, hand drawn is fine!).

Because the Arduino isn't controlling those PIR's, it only provides power. And a PIR is pretty low power. And if it was a power problem I would not expect a specific PIR still to work but all/random.

Also, do the leds have resistors?