Comparison in a while loop between a 7th loop valuee and 8th loop value

[Johnaxe]

I have a value (voltage input) in a while loop that changes, maybe not every loop, but every 10 or so. Every loop I have to make a comparison between the previous loop voltage, and the voltage I am receiving from the current loop. If it did not change, then I have to do nothing. If it did change, I have to AO the voltage plus a certain increment. I have no idea how I could do this. Help!!!

[altenbach]

Feed your voltage into a shift register or (feedback node).

The shift register contains the value of the previous iteration to be compared with the current value.

[Johnaxe]

It worked perfectly, thanks!