Refrigerator Humidity Control: help needed

I am a total newbie, but very interested in starting to use the Arduino.

Purpose of the project: I make home-made cheese and ripen the cheese in a "wine cellar"-type refrigerator in which I have to control the humidity using a small atomizer that switches on/off around a pre-set 85% RH.
I would like to be able to read the RH% on an LCD.

  • Planning to buy a USB Arduino Duemilanove (ATmega328).- Researched and found schematic to connect a relay (and I actually understood it).- I understand I need a SHT15 temperature/humidity sensor (If I'm not mistaken, I could then later on also monitor or, at an even later stage, control the temperature).- What else do I need in order to display the info on an LCD, what kind of LCD and how to connect it to the Arduino?- Last but not least: programming code... would this be readily available for download, or do I have to learn the (?) programming language?
    Sorry for my ingnorance in these matters. Any help would be greatly appreciated.

There are lots of LCDs to choose from. The amount of text/graphics you want to display, and the number of pins available, will influence your choice.

I use a serial LCD that requires just 3 pins (+V, gnd, and one data pin, driven by NewSoftSerial or Serial).

You will need to learn some programming. Different code will be needed for different LCDs.

For information about LCDs read this:-
http://www.arduino.cc/en/Tutorial/LCDLibrary

Last but not least: programming code... would this be readily available for download, or do I have to learn the (?) programming language?

It is unlikely you will find exactly what you want on line. You will probably find some code that does most of what you want, then you will have to modify it to your exact needs.
For example this tells you about the humidity sensor:-
http://www.glacialwanderer.com/hobbyrobotics/?p=5
but not the LCD.

PaulS and Grumpy_Mike, txs for your input.
I found this Instructable, which will probably help me a lot:

I decided to try to find all the boards used in this project and I did find the main items on eBay (including the same LCD Keypad Shield, which I couldn't find here in Thailand) for a price, including shipping from Hong Kong, cheaper than buying it locally.
Again, thanks for the links. They are definitely useful to me.
Take care,
Eric.