PTC100 mit MAX6675 an NodeMCU

MAX6675

Cold-Junction-Compensated K-Thermocouple-to-Digital Converter (0°C to +1024°C)

General Description The MAX6675 performs cold-junction compensation and digitizes the signal from a type-K thermocouple. The data is output in a 12-bit resolution, SPI™-compatible, read-only format. This converter resolves temperatures to 0.25°C, allows readings as high as +1024°C, and exhibits thermocouple accuracy of 8LSBs for temperatures ranging from 0°C to +700°C.

MAX6675 V1.2

GND   ---------- Ground ---------------------------------- G
VCC   ---------- +3 V - D4 ------------------------------- 3V
SCK   ---------- Serial Clock / Takt --------------------- 
CS    ---------- Chip Select ----------------------------- 
SO    ---------- Serial Data Out / Datenausgang ---------- 

                                                          NodeMCU V3