I need to design and develop a circuit for humidity and temperature measurement on LCD or LED display. Please suggest me the circuit and its components. I know the humidity meters are available in the market. But i need to develop it myself.

 

Here's a cheap Chinese humidity sensor from Rapid.
Rapid Electronics - Electronic Components

Old thread I know but this might come in handy.

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You can build a wet/dry bulb humidity sensor.
Wet Bulb Humidity Calculations

3v0

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BCHS/3v0's Tutorials
Junebug USB PIC programmer kit., USB Bit Whacker,
The 15 Minute Printed Circuit Board! (+drill time)

 

I need to make a circuit for humidity measurement.
Please help me for the circuit diagram.