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How do you convert temperature to LM35?
10 mills volt represent one degree centigrade/Celsius. So if Lm35 outputs 100 mills volts the equivalent temperature in centigrade/Celsius will be 100/10 = 10 centigrade/Celsius. Lm35 can measure from -50 degree centigrade/Celsius up to 150 degree centigrade/Celsius.
What is the difference between thermistor and LM35?
Thermistors are cheaper and smaller which is useful for applications where many points have to be sensed and little room is available. They can cover a wider temperature range than the LM35. They only have 2 leads and require less power per sensor since many sensors can share a readout circuit.
What is LM35 temperature sensor?
LM35 is a temperature sensor that outputs an analog signal which is proportional to the instantaneous temperature. The output voltage can easily be interpreted to obtain a temperature reading in Celsius. The advantage of lm35 over thermistor is it does not require any external calibration.
Is LM35 a thermistor?
There are two kinds of of thermistors, NTC (negative temperature coefficient) and PTC (positive temperature coefficient). Thermistors have some benefits over other kinds of temperature sensors such as analog output chips (LM35/TMP36 ) or digital temperature sensor chips (DS18B20) or thermocouples.
How does the lm35 sensor convert to temperature?
LM35 sensor produces voltage corresponding to temperature. This voltage is converted to digital (0 to 256) by ADC0804 and it is fed to 8051 microcontroller. 8051 microcontroller converts this digital value into temperature in degree Celsius.
Can a temperature sensor interfacing with ADC0804?
In our tutorial, we are interfacing Temperature Sensor with 8051 by using ADC0804. Like this, you can interface with any analog sensor. In our next tutorial, we will see how to interface ADC0808 with 8051.
Do you need an external clock for ADC0804?
ADC0804 also needs a clock to operate. The conversion time of the analog value to a digital value depends on the clock source. An external clock can be given at the Clock IN pin. ADC 0804 also has an inbuilt clock that can be used in absence of an external clock.
How to use the ADC0804 for the 8051 microcontroller?
ADC0804 interfacing with 8051. ADC0804 is an 8-bit ADC. 2.1 Why we are using ADC for the 8051 Microcontroller? 3.4 How to use the ADC0804? Analog to digital converters find huge applications as an intermediate device to convert the signals from analog to digital form. These digital signals are used for further processing by the digital processors.