TACHOMETER_USING_MAGNETIC_PICKUP_

Published:2009/7/1 20:51:00 Author:May | From:SeekIC

Signal frequency proportional to shaft speed being measured is fed into National LM2907 IC for conversion to output voltage that is proportional to input frequency. Output is zero at zero frequency. Ouality of timing capacitor C1 determines accuracy of unit over temperature range.Use equivalent zener-regulated LM2917 IC if output voltage must be independent of variations in supply voltage.- Linear Applications, Vol. 2, National Semiconductor, Santa Clara, CA, 1976, AN-162, p 3-4.



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