using a thermoresistor to make an analog thermomitor

[muke195]

I'm building a custom computer and I had the idea to put a thermomitor to allow me to keep an eye on the temperature of the processor. Since going to radio shack and picking up a digital thermomitor isn't what i want to do (come on whats the fun in that) i decided to make one. The way I view the temperature is acutally through an milliamp meter with a scale of .2 milliamps from 0 to 1milliamp. The problem comes when i try to make the milliamp meter move enough to view a change (right now it moves not even .25milliamp from icewater to boiling water with the diagram i found in an old schematic book. If some one could show me/ help me find a schmatic to increase the amount the milliamp meter moves per temperature change it would be greatly apreciated.

if i would need to get new resistors that would not be a problem thanks for any help

 

[Russlk]

The thermistor is very non-linear, but R2 is too small. Try R2=10K and see how it works.