DIGITAL_WITH_100_1_RANGE

Published:2009/7/10 3:56:00 Author:May | From:SeekIC

Frequency counter operated in period mode serves as readout for Optical Electronics 3329 voltage-to-frequency converter. Unknown capacitance is connected as external timing capacitance for IC, so output period of IC is directly proportional to unknown capacitance. To calibrate, conned known C and adjust R1 for correct reading on digital frequency counter. With values shown, 1 nF gives period of 1 ms.- Low Cost Capacitance Measurement, Optical Electronics, Tucson, AZ, Application Tip 10262.



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