is there have temperature measuring tutorial with
AVR 8535 and BasCom Compiler?
Did you do a forum search?
I'm sure there is at least one discussion somewhere on the AVRFreaks.net forum that discusses temperature measuring.
And even if its for another AVR model, the AVR core is pretty much the same across the different AVR classes, with the exception of the particular hardware differences among them.
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What interface do you wish to use? SPI or TWI/I2C or other?
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yup..i use SPI..
what i want to learn is to read data from ADC in A port..
and how to config thermal sensor with my A port
So, do you want to use a temperature sensing IC? A thermistor? A platinum resistance thermometer (PRT)? A thermocouple?
i think i will use a thermocople, because its easy to get in here
Maybe try checking out this IC: http://www.maxim-ic.com/quick_vi...
Also, I have been looking at NTC thermistors (resistance becomes more negative as the temperature increases) for measuring temperature. They have a decaying exponential resistance vs. temperature curve, but if you add a resistor in parallel with an NTC thermistor, it makes the resistance vs. temperature almost linear.
You could do something like a voltage divider with a (NTC thermistor and resistor in parallel) in series with another resistor. Then do some calculations to figure out what temperature the output voltage corresponds to.
How about using an LM35 temperature sensor (http://www.national.com/ds/LM/LM...)?
ADT7301 is my current fav. . .easy to interface, wide range, inexpensive and accurate to 1*C
mashura :- Google friend suggested
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A silicon diode works for me.
What temperature range?
If its above 100C, none of the solid state solutions will work.
And, what is the connection between wanting to use SPI and wanting to use an analog sensor? That would imply an external ADC, but most AVRs have suitable internal ones.
And what is the required accuracy?
thanks for All....
:D :D :D
i want to measure tempurature beetwen 20-40 celcius..(room temperature)
i think LM 35 is enough..
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Check out this tutorial: https://www.avrfreaks.net/index.p...
Simple and easy. Themocouples and RTD's (particularly PT100) are harder to use. So if it is your first AD appliction, I strongly suggest you to begin with this.
If you don't understand part of it, feel free to contact me, but it would be better to add any question to the tutorial thread.
Have fun and Merry Christmas.
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