how to design temperature, humidity and pressure data logger

[Olumuyiwa]

Anybody with an idea should please help me out.

[temtronic]

You don't give any specs for the logger !
temperature ??? *C, *F, accuracy, resolution, bits, speed, probe distance ????

humidity ??? range, bits, etc....

pressure ??? range, PSI, mB , ????

logger ??? samples ?? frequency, data storage amount, ????

PIC type ???

MMI ?? keypad, PC link, touchscreen, LCD (2x16, 4x20), ???

I can think of 100-130 valid questions to ask you BUT you must supply us with some 'reference' point of basic 'operation' of this logger.

If you're a beginner, I'd strongly suggest using and FTDI Vinculum based USB flashdrive interface to store the data as it's a simple, easy to use hardware. You can be storing data in an evening or two.

This project should be broken down into 4 or 5 'units'.
0) get a PIC and RTC (ds1307) up and running, display date/time on LCD.
1) get data storage up and running using 'dummy data'
2) get the temperature sensor/logging going.
3) get the humidity sensor/logging going.
4) get the pressure sensor/logging going.

Just a start.....if you can program C, getting a PIC to do all this should take 1 week's effort.