load sensor connect with pic16f877a

[areebee]

hi guys
really need your help
actually im doing trolley robot
which using ultrasonc, load cell and lcd

so
for load cell,
we need extra circuit or not to connect to pic??
so how about the code?
does anyone have done this project before???
really need your help

[yonghui]

hi,
what is load cell?

[royalstorm7]

hi...i did last time...the advanture is there....sure u need xtra circuit..!

royalstorm7@yahoo.com

[holy_rainman]

If i'm not mistaken, you would need a voltage divider to make it work. If the load cell have 3 wires, then i believe you don't need such circuit. Try google voltage divider theory and you'll know what i mean.

[shahrul]

If i'm not mistaken, you would need a voltage divider to make it work. If the load cell have 3 wires, then i believe you don't need such circuit. Try google voltage divider theory and you'll know what i mean.

The voltage divider not enough to read the difference. The response is very small until ADC can't see the different. I'm confident you will fail to use this method because I have tried before.
The solution is, use special amplifier like royalstorm7 said.

[holy_rainman]

may i know the special amplifier circuit? do you have a link for reference?

[royalstorm7]

it just a simple instrumentation amplifier, very less info but just plug and play...ez to used...!