How can I use Arduino Uno and load cell amplifier with Lcd 16*2 ??


Joined Jun 26, 2012
Welcome to AAC!
That is a big question with not much detail. But check these threads out to get started:

In general, the load cell is connected to an instrumentation amplifier to amply the signal and convert it to a single-ended output.
Then that output is fed to one of the Arduino's analog inputs.
From there you read the voltage from the load cell as an analog value.
Then you scale the raw analog value to yield Kg.
Finally, you output the weight in Kg to the display.

Arduino provides all of the libraries, math and LCD display libraries that you need. There is also lots of load-cell application notes out there for the cost of googling.

Good luck!