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frequency measurement

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can anyone help me with frequency measurements... i'm using a voltage to frequency converter to remotly sense a temperature, and for now i'm using a basic stamp to make the prototype. i will be moving it to the pic16f84 when done but i need to be able to measure the frequency down to +/- 1 Hz.... using the pulsein or the count function all i can get is a +/- 10 Hz and that is'nt good enough for the application.. so any hlep would be very much appreciated

the frequency range is a represntation of the absolute temp scale where 2732 Hz is the temp of ice


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