Hi,
i have done this project include:
1. Theory
http://www.electronics-freak.com/arduino-capacitor-meter-theory/
2. Video
http://www.electronics-freak.com/lesson-14-arduino-capacitor-meter/
3. Code
http://www.electronics-freak.com/lesson-14-arduino-capacitor-meter-code/
Enjoy,
Roee