Raspberry Pi 4 – I used a 3B for this as I had one around.In my (limited!) testing, I was able to get around 2 hours of use from a 10000Mah battery bank with the camera running. This whole unit actually runs from a portable battery bank. Making something portable, I wanted to be able to take this around and use it without being tied down to finding a power plug. It’s also very compact, which ties into my other objective. The MLX90640 features a 32×24 array of thermal sensors, can operate from -40 degrees Celsius to 300 degrees Celsius, and is accurate to within 1 degree. That’s when I came across the MLX90640 – a thermal imaging camera from Melexis – that uses the i2c interface, making it perfect for use with the Raspberry Pi. I also realised I hadn’t done a Raspberry Pi project here yet either, which is absolutely not acceptable given how much I use the Raspberry Pi! So definitely something I had to quickly rectify! This got me thinking, is there a better way to do this that doesn’t require human interaction? Here in the UK, many of the shops and restaurants have started taking the temperatures of customers at the door before allowing customers to enter the premises. In today’s current global situation, thermometers and thermal cameras are more in demands probably than ever before.
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