{"product_id":"max6675-relay-module-k-type-thermocouple-sensor-spi-interface","title":"MAX6675 Relay Module – K-Type Thermocouple Sensor, SPI Interface","description":"\u003ch1\u003eMAX6675 Thermal Sensor Relay Module – K-Type Thermocouple Amplifier with 5V Relay\u003c\/h1\u003e\u003cp\u003eThe MAX6675 Thermal Sensor Relay Module combines a precision K-type thermocouple amplifier with an onboard 5V relay, enabling direct temperature measurement and switched output control. Ideal for automating heating, cooling, or alarm systems, it communicates temperature readings via SPI to microcontrollers like Arduino or ESP32. The module simplifies high-temperature monitoring with a relay that can handle up to 10A loads.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e0°C to 1024°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e12-bit (0.25°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eSPI (3.3V\/5V compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelay Rating\u003c\/td\u003e\n\u003ctd\u003e10A @ 250VAC \/ 30VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V to 5.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermocouple Type\u003c\/td\u003e\n\u003ctd\u003eK-Type (not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e3D printer heated bed temperature controller\u003c\/li\u003e\n\u003cli\u003eHome brewery fermentation monitor with relay-triggered cooling\u003c\/li\u003e\n\u003cli\u003eBarbecue smoker temperature alarm system\u003c\/li\u003e\n\u003cli\u003eGreenhouse heater automation using setpoint thresholds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis module works seamlessly with Arduino Uno, Mega, ESP32, and Raspberry Pi using SPI communication. The logic level is 3.3V\/5V tolerant, so direct connection to most microcontrollers is safe. Pair it with any standard K-type thermocouple probe for accurate readings.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect SO, CS, and SCK to your microcontroller's SPI pins (e.g., Arduino Uno pins 12, 10, 13). Attach the thermocouple wires to the designated terminals, ensuring correct polarity (yellow positive, red negative). The relay terminals (NO, COM, NC) support loads up to 10A; use proper gauge wire and insulation for high‑current applications.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, connect the module directly to the Uno's SPI header. Use digital pin 10 for CS, and the SPI library for temperature data acquisition.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat thermocouple do I need?\u003c\/summary\u003e\u003cp\u003eYou need a K-type thermocouple probe, sold separately. Ensure it is rated for the temperatures you plan to measure and connect with correct polarity.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan the relay switch mains voltage?\u003c\/summary\u003e\u003cp\u003eThe relay is rated for up to 250VAC. Always use proper wiring practices and consider external fusing for safety when switching mains-powered devices.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445017010541,"sku":"CDN-0712","price":320.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_92f1c56b-271d-49b3-8fa5-44a8e2b41f16.jpg?v=1781512837","url":"https:\/\/compoden.com\/products\/max6675-relay-module-k-type-thermocouple-sensor-spi-interface","provider":"Compoden","version":"1.0","type":"link"}