How many pins can I actually use for sensors?

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notcopumpkin
Posts: 6
Joined: 22 Jul 2019 01:31

How many pins can I actually use for sensors?

Post by notcopumpkin » 22 Jul 2019 06:29

I'm looking to plug in a lot of door sensors/reed switches so I just need binary input. Judging from the diagram that came in the box, it looks like pins 0-8 and 17-25 can all be used for this purpose, so I should be able to connect 18 binary sensors or switches to the board. Is that correct?

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PoltoS
Posts: 5002
Joined: 26 Jan 2011 19:36

Re: How many pins can I actually use for sensors?

Post by PoltoS » 22 Jul 2019 17:40

That is correct. You can also use pins 9-16 - they are PWM, but can work as GPIO too

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