I have an analog load cell with just 4 wires sticking out of it.
I want to be able to connect it to a computer via usb. For that I am going to use the AVR micro controller and LUFA usb library.
My question is about connection of a load cell to a micro controller.
As far as I understand one needs to amplify the signal from a load cell with some amplifier and direct it to the analog input of the AVR controller. And then direct the digitised value to the computer.
But few times I saw people mentioning advanced chips that have an amplifier and analog-to-digital converter combined.
Are there any benefits of using such combined chips? And if there are, how the digital output of such chips should be read with the AVR controller?