help with arduino projects

[msavu]

Hi!
I am a sculptor and I want to create 3 interactive pieces: 1. motion triggered fan; fan speed variable.
2. motion triggered music/sound other than alarm; it has to be pleasant.
3. motion triggerd servo-motor.
I need to know what components I have to buy, the circuits and the Arduino codes.
Please help!
Mihaela

[adafruit_support_bill]

Motion detection is typically done with a PIR sensor. https://www.adafruit.com/products/189
These are pretty easy to use, and there are many example projects linked in the tutorial here: http://www.ladyada.net/learn/sensors/pir.html

You probably want to start with an Arduino and a PIR sensor.
There are various types of fans and they require different types of controllers. What kind of fan did you have in mind?
The Wave Shield is a good way to play sound files: https://www.adafruit.com/products/94
There are several types of servos. The "standard" servo is a good general purpose one. https://www.adafruit.com/products/155

[msavu]

Thank you for your answer!
I need the simplest small fan which can be used in the PIR-Arduino circuit. Any sugestions?
Mihaela

[adafruit_support_bill]

Computer fans are pretty easy to drive. Most take 12v DC there are some 5v DC fans too. Either can be controlled from an Arduino pin using a transistor.