cell charger ckt and components

hi i m an electronics engineering student. i hav a project using micro controller. plz help me out.u can give ur choices too which should be easy and less time consuming.i want 2 know bout the comp and ckt of cell charger,bar code reader ,voice recorder.
with regards

try using www.google.com
I bet you will find a whole lot of information for every thing you need with softwares and schematics