invader7:
anks i didn't knew that , im new to arduino , it has 6 analog pins , the 3 pins will be my 3 sensors so i will have another 3 free analog pins to use as digital , do you believe it's a risk to go with so little free pins or i will make it ?I think arduino mega will be more "safe" in order to be sure i could connect all of them...
It's your budget.
There are tricks to getting more input/outputs with additional hardware, but if you want to play it safe and you have the budget for it, go for a Mega.