6 or 8 analogue inputs?

[robtillaart]

in fact the Arduino has 1 ADC which is multiplexed over 6 pins to the outside.
You can add a multiplexer to A0 pin and create e.g. 16 analog lines this way.
Of course your code must be adapted to use this but that is not difficult.

• http://bildr.org/2011/02/cd74hc4067-arduino/ -
• SparkFun Analog/Digital MUX Breakout - CD74HC4067 - BOB-09056 - SparkFun Electronics -