After successfully reverse engineering the CR30 colorimeter, I found myself wanting something more versatile - a device that could not only measure reflected light but also handle transmittance measurements with fiber optic coupling. The result is this compact, portable visible light spectrometer built around a …

So here I am, a physicist who got bitten by the color science bug. What started as innocent curiosity about how light works has turned into a full-blown obsession with spectrometers, colorimeters, and now... laser power meters. You know how it goes - you start with one simple question and before you know it, you're …