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The Temperature Indicator using AT89C52 is a microcontroller based temperature indicator that displays the temperature in the range of –55 degree Celsius to 125 degree Celsius. Besides AT89C52 microcontroller, it uses a temperature sensor chip and an LCD module. The indicator outputs the calibrated data in digital form. No. of ICs used: 3
Things which you can learn:
*Learn interfacing of temperature sensing IC DS1621 with the microcontroller input.
*Learn designing of the bridge rectifier.
*Learn interfacing of LCD module with AT89C52.
Build a cool micro controller based temperature indicator for detecting temperature in heat sensitive environment to prevent damage to certain appliance.
The circuit of the Temperature Indicator (using AT89C52) employs the voltage regulator IC 7805 to provide supply to different parts of the unit. The temperature sensor DS1621 senses the ambient temperature and the output of this chip is read by the microcontroller unit. The temperature data is compared with certain user-defined temperature values and processed inside the MCU as per the programmed then sent to the LCD for display.