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数字电压表,Digital Voltage Meter
关键字：数字电压表制作,数字电压表电路,ICL7107
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
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