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Motor_hour_meter

2016-09-03 23:08  
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Motor_hour_meter
This circuit shows an ICM7249 that is connected as an hours-in-use meter and is capable of displaying how many hours that line voltage is applied to the motor. This configuration will operate continuously for 21/2 years using a 3-V lithium cell. Without the display (which only needs to be connected when a reading is required), the circuit will operate for about 10 years. Harris Semiconductors Data Acquisition, 1991. p 11-89