GROUP4word.docx - TEMPERATURE CONTROLLER By GROUP 4 CLASS...

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GROUP 4 CLASS AE-K59 By TEMPERATURE CONTROLLER
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MEMBERS Do Van Nam 20143017 Tran Phuong Nam 20143099 Nguyen The Giang 20141234 1
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1 DESCRIPTION 1.1. Overview Our project is to design and construct a device, which can be used to manage or control the temperature of many object, such as: room, cooker, radiator, refrigerator… 1.2. Idea Design a circuit that contains microcontroller to control many kind of input and output devices Multiple input: this device have to process both analog and digital signal comes from supported sensor (Thermocouple and RTD) Multiple output: to control the temperature, we want this device has an ability that can control many kind of actuators. So, we decided to apply both digital output and analog output for this system. 2
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2 DESIGNING 2.1 BLOCK DESIGN 3
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2.2 DESIGNING EACH BLOCK 2.2.1 POWER SUPPY Requirements: Compact, stable, avoids overheat effect, cheap, industrial input voltage level input, normal load support (1-2A) Solution: using LM2576 and B2405circuit Features: - 3.3V, 5V, 12V, 15V, and Adjustable Output Versions. - Specified 3A Output Current. - Wide Input Voltage Range: 40V Up to 60V. - 52-kHz Fixed-Frequency Internal Oscillator. 4
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To protect Microprocessor and some important components we use B2405 for isolation purpose. Features: - Input Voltage: 24VDC (nominal) (range: 21.6VDC – 26.4VDC). - Output Voltage: 5VDC. - Output Current (Max/Min): 400mA/40mA. - Operating Temperature Range: -40 o C - +85 o C. 5
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2.2.2 MICRO CONTROLLER Requirements: has enough I/O pin, fully communication, supports C/C++ programing language, ADC + timer peripherals, simple hardware connecting circuit.
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