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Which GND to use for sensors ?

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Which GND to use for sensors ?
primeroz Offline
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#1
06-23-2023, 01:58 PM (This post was last modified: 06-23-2023, 02:07 PM by primeroz.)
Hi, the only GND i see on the A2 is the one also used for POWER IN


I want to connect a PIR , i can take the `3v3` from the board but i am not sure which GND to use . Should i use the same as the `INPUT power` ?
example diagram of what i want to do


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#2
06-23-2023, 10:39 PM
it's ok, just connect with power's GND.
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