Hello,
I am trying to build a water tank level indicator using an MPX2010DP pressure sensor as per silicon chip schematic below.
http://archive.siliconchip.com.au/cms/gallery/article.html?a=109529&i=6
Using readadc10 on an 08M2 I can read something from the pressure sensor. However the number returned decreases when I increase the pressure on the MPX2010DP. Is this normal ? Shouldn't the value returned increase proportionally to the pressure applied ?
I have not quite grasped the theory of op-omps yet so if there is a problem in the op-amp circuit, I just copied it like a duck.
Any help would be appreciated.
I am trying to build a water tank level indicator using an MPX2010DP pressure sensor as per silicon chip schematic below.
http://archive.siliconchip.com.au/cms/gallery/article.html?a=109529&i=6
Using readadc10 on an 08M2 I can read something from the pressure sensor. However the number returned decreases when I increase the pressure on the MPX2010DP. Is this normal ? Shouldn't the value returned increase proportionally to the pressure applied ?
I have not quite grasped the theory of op-omps yet so if there is a problem in the op-amp circuit, I just copied it like a duck.
Any help would be appreciated.