A "volt" meter

[the poi]

I'm planning on building a display with a basic 3-digit LCD display, like this one: http://www.digikey.com/scripts/DkSearch ... 57&Site=US . It needs to take a 0-5v signal, double the voltage, add 9, and then display this with one decimal place. It would seem that I jsut need to "make a voltmeter" with it, but just add the *2+9 operation on the input. Anyone have any information, or a link, on how to make a basic voltmeter with a display like this, and how I can add the operation to the input? Thanks for anythign you guys got!<p>
edit:// and I have little to no circuit design knowledge, so I'm hoping for some sort of rela beginners guide to using one of these displays. I know its probably a longshot, but I figured it was worht a try : )

[MrAl]

Hi there,<p>The easyest way i can think of is to purchase one
of those already built voltmeters (maybe $8) and
use an op amp on the input to add a 9 volt
reference dc voltage to the measured (0-5v)
voltage. The op amp circuit is pretty simple.<p>What kind of accuracy are you looking for?<p>Take care,
Al