Description: Curriculum design is based on the CU50 STC89C51 of Intelligent Sensor and Thermometer. Intelligent Thermometer circuit mainly by STC89C51 SCM, buttons, LED, LED display, serial communications interface, power supply, ADC, E2PROM and other circuit, the MCU as the core control 51 component, the use of CU50 characteristics of resistance varies with temperature , and the other three resistors to form non-balanced bridge, and therefore, the temperature change can be converted into a weak bridge output voltage signal change, the voltage signal amplified by the integrated operational amplifier circuit and sent to A/D converter, the analog signal converted into digital signals. Microcontroller to set the input volume and the amount of the operation, the results sent to the digital display, complete temperature measurement.
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智能仪表.doc
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