how to connect thermocouple with a micro controller

for measuring temperature from 0 to 150 degree . i am using attiny85 controller . what kind of driver should i use . what kind of thermocouple should i use ...

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0 gihu over 12 years ago

Hi Alex,

If you need to use an thermocoupler, check this:
Thermocouple Amplifier MAX31855 breakout board (MAX6675 upgrade) [v2.0] ID: 269 - $14.95 : Adafruit Industries, Unique &…
Then you can read the temperature just over SPI.

You also can use thermistors or platinium resitance (PT100, PT1000...), take into account that that it will be easier if you use a platinium resistances because it is linear whereas thermistor are non-linear. So with a PT1000 you will need a formula like "y = mx + n", to translate between voltage measured to temperature, while with a thermistor I think you will need to create a table into your code or an extra circuitry to make linear the analog signal.

Hope it helps,
Miguel
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0 gihu over 12 years ago

Hi Alex,

If you need to use an thermocoupler, check this:
Thermocouple Amplifier MAX31855 breakout board (MAX6675 upgrade) [v2.0] ID: 269 - $14.95 : Adafruit Industries, Unique &…
Then you can read the temperature just over SPI.

You also can use thermistors or platinium resitance (PT100, PT1000...), take into account that that it will be easier if you use a platinium resistances because it is linear whereas thermistor are non-linear. So with a PT1000 you will need a formula like "y = mx + n", to translate between voltage measured to temperature, while with a thermistor I think you will need to create a table into your code or an extra circuitry to make linear the analog signal.

Hope it helps,
Miguel
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Vote Up 0 Vote Down

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