Tuesday, August 5, 2014

Digital Thermometer Circuit Schematic Using LM35 Based Arduino UNO

Eltronicschool. - Maybe you will looking for digital thermometer circuit schematic for you collection or you will make in real condition based on microcontroller now?. We think that there are many electronic circuit that show you about digital thermometer application using sensor LM35. Usually the design digital thermometer also controlled with Microcontroller like MCS51, AVR, Arduino, etc.  

Here we will show you one electronic circuit about digital thermometer using LM35 sensor that based on Arduino microcontroller like in figure 1 below. Beside we show you this circuit electronic, we also will give you arduino program for Digital Thermometer using LM35 Sensor with download this program from external server.

Circuit Schematic

Figure 1. Digital Thermometer Circuit Schematic (Circuitstoday)

Component List
  1. Sensor LM35
  2. Q1-Q3 = 2N2222
  3. R1 - R8 = 330 ohm
  4. R9 - R11 = 100 ohm
  5. Arduino UNO Module
  6. 7 segment CA


And here is the description about the circuit schematic like in figure 1 above from circuitstoday blog as follow:

Range of this thermometer is from 0°C to 99.9°C. There is also a provision for displaying the temperature in °F scale. Three terminal analog temperature sensor LM35 is used as the sensor here. LM35 can measure temperatures between -55°C to +155°C. 

The supply voltage range is from 4V to 30V DC and the current drain is 60uA. The LM35 is available in TO-92 package and it is very easy to use. The output voltage of the arduino increases 10mV per °C rise in temperature. That means if 25 °C is the temperature, then output  voltage of the sensor will be 250mV.

And to know program list of arduino you can click here.

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