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Ligne 19 : − − Using a Thermocouple Created by Ladyada − If you're using an AD595 interface chip, you can simply connect the voltage output to an analog input on your microcontroller and do some basic math to multiply the 10 mV/°C input into numerical output. − attached.jpg − − If you're planning to use the MAX6675/MAX31855, there's a little more work to be done. First off, Vin and GND must connect to a 3-5V supply. Then the three data pins must connect to digital IO pins: − − CLK (clock) is an input to the MAX6675/MAX31855 (output from microcontroller) which indicates when to present another bit of data − DO (data out) is an output from the MAX6675/MAX31855 (input to the microcontroller) which carries each bit of data − CS (chip select) is an input to the MAX6675/MAX31855 (output from the microcontroller) which tells the chip when its time to read the thermocouple and output more data. − − In the beginning of our sketches, we define these pins. For our examples DO connects to digital 3, CS connects to digital 4, and CLK connects to pin 5
Senseur Thermocouple-Utiliser (voir la source)
Version du 12 août 2013 à 07:58
, 12 août 2013 à 07:58→MAX6675/MAX31855
[[Fichier:Thermocouple-21.jpg|480px]]
[[Fichier:Thermocouple-21.jpg|480px]]
cap.jpg
cap.jpg
If you are using the MAX31855 v1.0 in a noisy environment, you may need to add a 0.01uF capacitor across the thermocouple leads.
If you are using the MAX31855 v1.0 in a noisy environment, you may need to add a 0.01uF capacitor across the thermocouple leads.