DIY-Thermocam: A low-cost thermal imager based on the FLIR Lepton sensor
Can you make a slightly crappier version with a much cheaper visible spectrum sensor? I don't know much (obviously) about how they work, but intuitively it would seem a bit weird to me if they just happened to be restricted to exactly the same part of the spectrum as our eyes as a hardware limitation. Can you ignore data about visible red and higher in firmware, and get a thermal image that's obviously not as good as a purpose-built sensor, but maybe useful for some applications?