NIST on Spaghetti Code with Beerhttps://nagimov.me/tags/nist/Recent content in NIST on Spaghetti Code with BeerHugo -- gohugo.ioen-USMon, 15 Aug 2016 17:55:00 -0800Calibrating MAX31855 Thermocouple Amplifierhttps://nagimov.me/post/calibrating-max31855-thermocouple-amplifier/Mon, 15 Aug 2016 17:55:00 -0800https://nagimov.me/post/calibrating-max31855-thermocouple-amplifier/Maxim 31855 chips are cheap and simple to use K-type thermocouple amplifiers. They’re equipped with a digital SPI interface with libraries available for both Raspberry Pi and Arduino boards. MAX31855 breakout boards are available from Adafruit. The datasheet specifies the accuracy of ±2°C within the temperature range from -200°C to +700°C. However, close to the lower bound of this range, the accuracy of reported temperature is affected by linearized volt-to-degree conversion.