This is my “OpenTemp” project! It is a highly compact, pocket-sized thermal imager/infrared thermometer with a vast measurement range of -40 to 300°C. It is capable of achieving precise infrared radiation measurements corresponding to ±1.5°C (or ±0.2°C up close) in addition to a wide FOV of 110° at 768 FIR pixels of resolution. It runs off an STM32F413 with thermal imaging handled by an MLX90640.

This project can be useful for various applications such as human/animal detection, non-contact temperature measurement, or identifying any places of unusual heating. I have used it multiple times already to help troubleshoot PCBs (excessive heat usually indicates something is wrong), and even check how hot my coffee is without sacrificing tongue cells. In addition, all the data is interpolated via bilinear interpolation for a smooth and well-rounded image.

Everything there is to know about this project is documented further in detail on my website for free here if you're interested!

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