• adding a "small" ( 1 uF ? ) cap - how would it "smooth" the result ?

    The ADC in the chip expects quite a low resistance to get accurate results (since otherwise the act of switching in the ADC itself would cause the voltage to drop) - so the capacitor gives you that low resistance :) It may not actually be an issue here at all - it's usually for 100k+, and you're not looking to get loads of accuracy (I guess even just 6 bits would do you pretty well).


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