iceman1979

Not a problem. I was lost too when I started trying to figure out load cells.

This is the IC that I have INA128P. Look at the schematic on the first page.
1. Connect S- to pin 2 of the INA128, connect S+ to pin 3 of the INA128.
2. If you have a bread board connect the netduino +5v and ground pin to the power rails on the bread board.
3. Connect E- and E+ to the breadboards power rails.
4. Connect pin 7 on the INA128 to the +5v rail.
5. Connect pin 4 and pin 5 of the INA128 to the ground rail.
6. Either use a resistor for the gain you want or do what I did and use a pot as a variable resistor. Use a multi meter to determine which two pins of the pot will show a resistance change when you turn the pot and connect those to pins 1 and 8 of the INA128.
7. Connect pin 6 of the INA128 to the analog pin of the netduino.

This should get you up and running quickly.

Back in September of 2007 I took apart a bathroom scale and found some 3 wire load cells. Here is the thread on Electro-tech-online.com where I stumbled through figuring out load cells.

Here is a picture of the load cell I picked up last year and got working with an arduino.

Hope that helps and let me know if you have any more questions on getting this going. I remember it being a pain when I started learing about load cells so if I can help save you some of that heartache I'd be more than happy to.

Thanks
John