Data Acquisition System

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Data Acquisition System

• Submitted by
• Harneet Singh
• Sushant Kumar
• Guide Mr. Vinod Khera

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Objective

• To sample real world data, process it and display
  on a LCD
• This Data Acquisition System works as a
  microcontroller-based digital thermometer for
  measuring the temperature.
• Displays fever if the temperature is more than 37
  degrees.

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Introduction

• Data Acquisition is the sampling of real world
  data
• Data that can be stored and processed
• DAQ includes appropriate sensors that convert any
  measurement parameter

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Advantage of PIC16F84

• What sets a microcontroller apart from other
  processors are special circuits to deal with the
  needs of real time applications.

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PIC FEATURES

• Harvard architecture
• Improves bandwidth over traditional von Neumann
  architecture
• The PIC16FXX has a 13-bit program counter capable
  of addressing an 8K x 14 program memory space
• Watchdog timer
• RISC instruction set
• SOIC package

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PIC16F84 Microcontroller
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Pin Diagram
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Dallas DS18S21
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Pin configuration
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DALLAS DS18S21

• Direct-to-digital temperature sensor
• The output of the temperature sensor has 9-bit
  resolution
• The DS18S21 can function as a standalone
  thermostat with user-programmable trip-points or
  as 8-bit temperature sensor with a 1-Wire digital
  interface

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DALLAS 18S21

• operating temperature range of 55C to 125C
• Accurate to 1C over a range of 0C to 85C

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Future Scope

• It can be programmed to work as a temperature
  alarm
• This system can be integrated with a notification
  service
• This will make this system a networked embedded
  system. The notification could be through
  (SMS)/email

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Conclusion

• The features make the Data Acquisition System a
  system of choice and a system of future, having
  unlimited scope for development and expansion

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References

• 1. www.oshonsoft.com
• 2. www.microchip.com 
• 3. www.maxim-ic.com 
• 4. www.educypedia.be 
• 5. Datasheet of PIC16F8X
• 6. Datasheet of DS18S21

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