The output pulse train of a TMP04 temperature sensor is of nominally thirty five pulses per second in environments that has a temperature of twenty five degrees Celsius. This is where the temperature is expressed as a ratio of high time to low time. This is illustrated as in the equations belowThe user interface consists of a key pad for entering data and LCD for displaying the data. The main menu provides three options; position and temperature control, transmission and conversion, and display of the converted data. When the system is in a control mode, the button can be pressed and moved to indexed positions. The positions are 1, 2, 3, and 4. 1 is zero degrees, 2 are forty degrees, 3 are ninety degrees, and 4 are one hundred and eighty. When the system is in temperature control mode, pressing one will reduce the temperature, pressing two will reverse the temperature, pressing three will increase the temperature, and pressing zero will start the system at the indicated temperature and direction. The TMP04 will be stopped using a different push i. a button switch. When in operation and in its control mode, pressing 1 will increase the proportional gain factor while pressing 4 will reduce the gain factor. Conversely, when 3 are pressed, the display will be increased as 6 will increase the display of the temperature sent to the LCD every time a control loop is updated. When # is pressed from the position, temperature or an uprising menu will return the control to the menu. A temperature sensor is used in detecting when a certain key is pressed on the keypad and data is transmitted to PIC 16F88. A second PIC will communicate the conversion to the LCD output. The quadrature counter is used in tracking the TMP04 encoder position. The PIC 16F88 then communicated with 16F84 through start and serial communication channels. The internal oscillator of the system will then be configured (Marwedel, 2006).Most applications are dedicated in controlling and measuring temperatures in ideal environment necessary to most needs. Obtaining optimum performance it will be good to offer temperature control and measurement structure by offering a safer heating or safer cooling system with appropriate performance based on flexibility, portability, and efficiency. Extensive studies have been done on heating control due to their necessity in their applications. Here, the paper focuses on process that could be
Marwedel, P. 2006. Embedded system design. New York: Springer.
Singh, A. 2008. Embedded system. New Delhi, India: Maxford Books.
Tierney, S. 2011. Embedded system. Delhi: English Press.
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