Load Cell + 0804 +8051 microcontroller

[jjeevan007]

Load Cell + ADC 0804 +8051 microcontroller

hi to all,

i want to interface the load cell with 8051 microcontroller through the adc 0804


please someone guide me

regards
jjeevan

 

[dexter0904]

did u google ?
There are tons of info on this...

 

[paulfjujo]

hello

can you give some spec
Amplitude max of signal ?
use Differantial mode or common mode ?
Nb of sample per second ?

langage C or ASM ?


i suspect than AD0804 has a too poor resolution for that application ( 8 bits -> 255 steps)
or you must use analog ampliifer before the ADC.

or you can copy this
https://www.8051projects.net/adc-interfacing/adc0804-8051-programming.php

 

[jjeevan007]

ya i did but i got all things using the op amp only,

i dont want to use the amplifier is there any microcontroller or ADC which has lower step size............

 

[paulfjujo]

see ADC like AD7715, MCP3204, 14bits up 18 bits
and analog gain amplifier x1,2,4,8
µcontroller PIC18F46K22 ..
depends of your knowledge ! familly controller, programming langage and tools ..

YOU HAVE to decide by yourself

start the job and maybe you will get further help.

 

[dexter0904]

Yes, you have to use op-amps for some amplification. or you can use ICs lilke AD620....
usually Microcontrollers come with ADC resolution not more than 12 bits like dsPICs30F6011a,

 

[jjeevan007]

how to use the op-amps could anybody suggest me

here is circuit which i am using..........


how to interface with microcontroller.............

please post the full circuit with load sensor and opamp and along with microcontroller.........