Changing ADC voltage range.

Hi, I'm quite new to this whole programming thing, but I was wondering is it possible to fully utilise the 10bit ADC range for say 0 to 2.5 volts instead of the preset 0 to 5v. So 2.5v would equal 1023 bit instead off 511.

Many Thanks in advance H

Yes you can do it

you just mmumblemumble mumble szjøja zlnzvlfaojzd.mzkjhlh< zzzzzzz.zzz. zzzzzzz zzz zz GOOGLE arduino referance voltage that will lead you to xxgjxjnx o orxfjksrhz mi mumble mumble
http://arduino.cc/en/Reference/AnalogReference?from=Reference.AREF

Tutorials are made to be read

Need to sleep now

David