How to add 6 extra pins to your Arduino with no extra hardware

Hello, this is my second Instructable so please bear with me.
I am going to tell you how to get 6 extra Arduino digital pins.
I discovered this by playing with the Arduino IDE and tried setting up a LED on pin 14 (which does not exist on the board) And guess what? Analog pin 0 is pin 14!

Step 1 How to get the other analog inputs working too

It is pretty simple to get the others working too! Here is a list of all of the pins:

Pin 14 = Analog in 0
Pin 15 = Analog in 1
Pin 16 = Analog in 2
Pin 17 = Analog in 3
Pin 18 = Analog in 4
Pin 19 = Analog in 5

Unfortunately these are not PWM pins, but you can use the SoftPWM library to get software-based PWM, which is almost as good as native PWM.

Comments

[oqla2000]

Good info thanks !

['jaiswal]

thanks for the information.....as all know that "analog pin can be use as digital" is already on arduino.cc....... but helpful info. is that A0 is pin 14...that is not given on site... :)

[neutron7]

On the MEGA the anlog pins are digital  53,54,55 etc.

[Grathio]

It's new to me!  Thanks for sharing!  I know this will come in handy!

[ReCreate]

Its nothing new, Its already on the board >_<

[davidbuzz]

it's also on this page:  www.arduino.cc/en/Guide/Board  whereit says :
" Most of the analog inputs can also be used as digital pins "

[belectric23]

News to me - thanks for the tip!

[mikemmcmeans]

neat, but what about the arduino MEGA's?
they have digital pins up to 53 and analog pins upto 16

[Dege]

 It's already in the arduino documentation but it's a bit hidden:
http://arduino.cc/en/Reference/PinMode
(watch the note at the end of the page...)

[Noodle93]

Yeah, this is pretty well known.

[ikestarm17]

that's pretty cool and is very helpful. Thanks!