Marc made this cool temperature monitor using an Arduino Uno R3 and our thermocouple breakout board. In the photo above, he’s using the circuit to monitor the temperature of milk for making yogurt. He writes:

Monitoring cooling milk during yogurt making with Arduino Uno R3 and thermocouple. Phase 1 of yogurt making is heating the milk to 190-200 F, phase 2 is letting it cool to about 120 F, phase 3 is adding yogurt from a previous batch, phase 4 is letting it culture. This photo is phase 2, letting the milk cool. The sensor and electronics will tell me when the milk is close to 120 F, so I can be ready to add the yogurt (cooling can take over 30 minutes).

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