Hi all, i am using arduino uno and i have used all 13 pins so i dont have an option to connect switches or keypad, so i decided that i would use four piezo resitive elements connected to pins A0-A3 as keypad, as i require only four keys. okay so i have four piezo elements A B C D there are 10 ar…

Analog Read question?

anatolyk69_gmail.c March 30, 2014, 5:07pm 4

You may use analog as digital inputs, on UNO board digital 14 - 19.

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