I am a student using a PIC 16F877 in a project and would like to read an
analog input from an accelerometer setup that varies its output from 0-11v.
This voltage is put out by a signal conditioner made by the manufacturer of
the accelerometer so I have little control over it. Now I know there are
vref pins I can use, but some analog inputs will be in the 0-5v range and
I'd rather not lose precision on them by changing the voltage reference to
accomodate the range of the accelerometer. How can I step down the 0-11v to
0-5v? Can I use two high high value resistors to divide the voltage down? I
am considering that approach but am afraid of the effects temperature will
have on the resistors and thus the readings, since I am told that resistors
are prone to drift with temperature. The accelerometer will be used
outdoors, inside a model airplane, where temperature could vary
considerably. Also, having little background on EE, I am not sure what other
effects might follow from using the resistors. Any thoughts or other
approaches? I know little about EE, so bear with me if this is too basic.
Thanks.

Lindsay

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