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Temperature Sensor Gauge

2014-11-19 07:24  
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In the diode thermometer (IN4148) is used as a temperature sensor . IC2 is a BCD output which an A / D conversion. R7 set reference voltage is applied to the positive input of IC2. As the temperature rises, the temperature sensor reduces the voltage across the resistor. IC2 between the pins 10 and 11, which increases the differential input voltage.

Digital Miscellaneous Temperature Gauge 

R3 adjust the calibration is low. R17 zero A / D converter and R7 adjust the calibration is high.


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