MAX6675 Thermocouple Controller

Overview

This module interfaces to a MAX6675-series thermocouple controller and is the previous model of MAX31855.

• Works with any K type thermocouple
• 0 to 1024 degree C output in 0.25 degree increments
• 3.3 to 5v power supply and logic levels

Wiring

Note : Add a 0,01 uF tental capacitor parallel to the thermocoule as noice filter.

Usage

Usage is very simple. Using the example pins shown above:

MISO = B4; SCK = B3; CS = C0;    // Espruino 
//MISO = A6; SCK = A5; CS = A7;    // PICO or Espruino WiFi
//MISO = NodeMCU.D6; SCK = NodeMCU.D5; CS = NodeMCU.D7; // NodeMCU
//MISO = D12 ;SCK = D14; CS = D13; // ESP8266 >= ESP12

SPI1.setup({ miso:MISO, sck:SCK, baud:1000000 });  
var max=require("MAX6675").connect(SPI1,CS);
setInterval(function(){console.log(max.getTemp());},2000);

getTemp() returns an object with either property temp, the temperature in C, or fault containing an error code, and for common errors, faultstring which contains a short discription of the error condition.

Buying

• eBay