Use a temperature sensor to measure your skin temperature, and register the output with three LEDs. Even though the Arduino is a digital tool, it can interpret signals from an analog input, like the ...

Interfacing Temperature Sensor and LCD with ARDUINO: Reads temperature data and displays it on an LCD screen. Interfacing Temperature Sensor with ARDUINO: Captures temperature data using sensors like ...

Nice method and analysis. The temp sensor 3 pin devices are simple and cheap but good for 0.5 deg C precision or nearly a full degree in human measure.