Used MAX31855 Thermocouple for temperature measurement.
| Pin | Sensor |
|---|---|
| 1 | Vin |
| 9 | Gnd |
| 21 | DO |
| 29 | CS |
| 23 | CLK |
Used SSR-25DD solid state relay with an NPN transistor and a resistor to switch the 5V.
| Pin | Relay |
|---|---|
| 2 | + |
| 11 | P |
The - of the relay goes to the N side of the NPN transistor. Pin 11 goes to the P side of the NPN transistor. The other N side goes to GND (I used Pin 9) with the resistor inline.

