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How to build Digital Voltmeter

December 25, 2010 - category: Current and voltage

Circuit diagram

The ICL7107 is a 3 1/2 digit LED A/D convertor. It contains an internal voltage reference, high isolation analog switches, sequential control logic, and the display drivers. The auto-zero adjust ensures zero reading for 0 volts input.

author: Zeus Electronics
circuit from http://www.geocities.com/

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