© Guillermo Guillen 2024
G. GuillenSensor Projects with Raspberry PiMaker Innovations Serieshttps://doi.org/10.1007/979-8-8688-0464-9_7

7. Homemade Spectrometer

Guillermo Guillen1  
(1)
Ciudad de Mexico, Mexico
 

This is an open-source experiment kit made with the AS7262 (six colors) and AS7263 near-infrared (NIR) spectral sensors and the Raspberry Pi. I have divided this chapter into two parts. First, I used the AS7262 six-color spectral sensor to create a filter spectrometer to sense colored solutions. Second, I used the AS7263 NIR spectral sensor to assess plant foliage health. It explains how to use the sensor’s channel readings and the standard Normalized Difference Vegetation Index (NDVI) equation to calculate an estimated NDVI value, either “HEALTHY” ...

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