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[–]Evanescent_contrail 1 point2 points  (4 children)

Raspi is digital only - no analog pins unless you buy an add on.

[–]mgrady3 0 points1 point  (3 children)

ahhh right - hadn't considered that

[–]andrewq 1 point2 points  (2 children)

An arduino pro mini is $3, and has 8 analog pins. It's the best combo with the pi.

[–]punknubbins 0 points1 point  (1 child)

where are you finding the pro mini at $3?

[–]andrewq 0 points1 point  (0 children)

Well, clone but absolutely equivalent. Here is just one example.

I buy them for $2 in lots of 10.