Summary of Temperature Indicator using PIC microcontroller
Summary: This project explains building a temperature indicator using a PIC16F676 microcontroller, an LM35 temperature sensor, and a 4-digit common-cathode seven-segment display. The LM35 outputs a voltage proportional to temperature (in mV), requiring no external calibration and offering ±0.4°C accuracy at room temperature. A 5V DC supply powers the system. The display shows measured temperature, and a voltmeter can be used to verify the sensor output.
Parts used in the Temperature Indicator using PIC microcontroller:
- PIC microcontroller (PIC16F676)
- 4 digit seven segment display (common cathode) (or 3 digit)
- Temperature sensor IC (LM35)
- 5V DC power supply
Hi friends, today we will see how to make temperature indicator using PIC microcontroller. The basic aim of this project is make you familiar with PIC microcontroller. It also explains how LM35 and 7 segment displays can be interfaced with PIC microcontroller.
Components required:
Following is a list of components required for temperature indicator using PIC microcontroller – mini project:
- PIC microcontroller (PIC16F676)
- 4 digit (or 3digit) seven segment display (Common cathode)
- Temperature sensor (LM35) IC
- 5V DC power supply
Circuit diagram:
Following figure shows circuit diagram of temperature indicator using PIC microcontroller.
Theory:
In this mini project we have used PIC microcontroller and a four digit seven segment display is interfaced with it. For sensing the surrounding temperature we have used a temperature sensing IC i.e. LM35. You can use a voltmeter to crosscheck whether the indictor giving correct output or not. The output of the temperature in terms of volts will be in the range of mV.
Working of LM35:
LM35 is an integrated temperature sensor. It produces output voltage proportional to the temperature. The advantage of using LM35 is that it does not require any external calibration technique and it has accuracy of ±0.4 degree Celsius at room temperature. It draws only 60µA from supply and possesses low self heating. Thus the chances of error get minimized.
For more detail: Temperature Indicator using PIC microcontroller
- What microcontroller is used in the project?
The project uses the PIC16F676 microcontroller. - Can I use a 3 digit display instead of a 4 digit display?
Yes, the article states a 4 digit or 3 digit seven segment display (common cathode) can be used. - What temperature sensor is used in the project?
The project uses the LM35 temperature sensor IC. - Does the LM35 require external calibration?
No, LM35 does not require any external calibration technique according to the article. - What accuracy does the LM35 provide?
The LM35 has an accuracy of ±0.4 degree Celsius at room temperature. - How is the LM35 output expressed?
The LM35 produces an output voltage proportional to temperature in the range of millivolts (mV). - What supply voltage is required for the project?
The project requires a 5V DC power supply. - Can a voltmeter be used to check the indicator output?
Yes, a voltmeter can be used to crosscheck whether the indicator is giving the correct output. - How much current does the LM35 draw?
The LM35 draws only 60 µA from the supply as stated in the article.
