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                                          My PIC12F683 Development Board
Office Map Circuit diagram for each experiment may not be available separately because they are conducted with PIC12F683 development board that I made. So, the readers should first see the schematic of my development board.

Friday, August 27, 2010

A Versatile Temperature Data Logger using PIC12F683 and DS1820

There are varieties of digital temperature logger projects available online based on different microcontrollers. The one I am going to talk about is based on a Microchip's 8-pin microcontroller, PIC12F683. It reads temperature values from a DS1820 digital sensor and stores in its internal EEPROM. PIC12F683 has 256 bytes of internal EEPROM and we are going to store the temperature values in 8-bit format. This means only the eight most significant bits of temperature data from DS1820 will be read and as such the temperature resolution will be of 1 degree C.

My temperature logger has following features:
  • Reads temperature from a DS1820 sensor and stores in the internal EEPROM locations.
  • Can store up to 254 temperature values. EEPROM location 0 is used to store the sampling interval, and location 1 is used to store the number of records.
  • Three sampling interval options: 1 sec, 1 min, and 10 min. This can be selected during powering up.
  • Start and Stop buttons for control operations.
  • The recorded temperature values can be sent to PC through a serial port. A separate Send button is available to initiate data transfer.
  • A LED to indicate various ongoing operations.
  • Reset button to clear all previous records.  

Online Embedded Systems Lab

This online laboratory teaches you the fundamentals of microcontroller-based embedded system development through a series of laboratory exercises. Most of the time, students and hobbyists could not afford expensive development kits and software to learn these things. These tutorials are prepared such that you will be building microcontroller projects at a minimum cost. Check this out