Here is what you might have been thinking of.
http://tronixstuff.wordpress.com/2012/02/29/tutorial-analog-input-for-multiple-buttons-part-two/
Expand the network for the number of buttons you want to use.
Here is what you might have been thinking of.
http://tronixstuff.wordpress.com/2012/02/29/tutorial-analog-input-for-multiple-buttons-part-two/
Expand the network for the number of buttons you want to use.