source code for load cell

[eyenierazali]

hello.

is there anyone who familiar with load cell sensor? i am using 500g load cell sensor with instrumentation amplifier INA114AP. i want to convert the weight to volume (ml). is there any examples of load cell source code using C compiler?

[temtronic]

yes, though you've got to explain better!
Normally you'ld setup an experiment with min and max weights,observe the analog output going to the PIC ADC.A couple of mid weights would be good,incase output is not 100% linear.
Once satisfied with the output range'get max bits for max weight',etc.,then cut code as required.
We don't know...
PIC type
Compiler version
math for weight->volume conversion(material dictates 'math'?)
display choice (LCD,PC,LEDs,audio,??)

You're best to start with the '1Hz blinking LED' and 'Hello World' programs.Once you've got them working, run the 'experiment' and report back.Include your test program.
After that we can help out...

Also you MUST mention if this is a Proteus simulation !!

hth
jay

[eyenierazali]

tq for the reply.. and i"m sorry for the lack of the information..its due to i'm not too clear with this project.

yes, it is a Proteus simulation.

PIC type : 16f877a
Compiler version : C compiler
display choice : LCD

i will do the experiment first then.

[Mike Walne]

You don't tell us much.

1) Is this school project, commercial product?
2) Is it part of a something else not primarily weighing, eg robot?
3) What resolution do you want?
4) What about temperature stability?
5) Have you got REAL hardware to work with?
6) Have you got any results to date?
7) What experience do you have?
8) Have you read the forum guidelines?
................

Mike

PS. If this is Proteus only simulation, then I'm out.

[eyenierazali]

hi mike..tq for reply. so i will explain what i am trying to do. i hope this help.

this is actually my fyp project. my project is about digital blood donor scale. the current scale is still mechanical type. so the process of monitoring blood level is done manually. the objective of this project is to alert the nurse that the blood has reached the stipulated volume and to make sure the collected blood is exactly 350 ml or 450 ml. before the blood reached the stipulated volume, there will be a buzzer and LED alert at some programmed level of blood. and of course i need to do the hardware also.

[Mike Walne]

[necati]

http://www.steeman.be/?p=192
http://steeman.be/files/Load%20cell%20amplifier/18F2550%20timer.c

[SherpaDoug]

Weight is proportional to volume. If you can read an analog input and multiply by a scaling factor, it does not matter if the analog signal comes from a load cell or any other source. There is no "load cell C code" just code dealing with an analog to digital converter.

The analog circuitry to interface to a load cell is not trivial, but not too hard either.
_________________
The search for better is endless. Instead simply find very good and get the job done.

[asmboy]