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Old 04-22-2011, 11:59 PM   #15 (permalink)
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The LM2907 is a low cost frequency to voltage converter that works also works great for interfacing to a variable reluctance transducer. It comes in a couple variations. The 8 pin part has all the signals necessary for this application.

Search for LM2907 then download the data sheet. At the bottom of page 12 in the data sheet there is an example circuit for this application.

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