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nobody

01 Apr 2023 18:34



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Interesant ce faci.
M-am uitat peste datasheet la AS7341 si as zice ca-i mai mult colorimetru decat spectrometru.

Flickering se refera la fluctuatia sursei de iluminare, de ex. la becurile si tuburile fluorescente clasice luminozitatea variaza cu frecventa retelei 50Hz - la cele in comutatie poate avea o frecventa mai inalta dar cu amplitudine mai redusa. La monitoare este dat "refresh rate" si de remanenta.

Adresele I2C se pot scana usor daca nu le stii din documentatie sau au fost reprogramate.

1 General Description
The ams AS7341 is an 11-channel spectrometer enabling new consumer, commercial and laboratory
applications including spectral identification, reflection and absorption for color matching, fluid or
reagent analysis, passive ambient light measurement and color calibration. The spectral response is
defined by individual channels covering approximately 350nm to 1000nm with 8 channels centered in
the visible spectrum (VIS), plus one near-infrared (NIR) and a clear channel. The NIR channel in
combination with the other VIS channels may provide information of surrounding ambient light
conditions, including light source detection. Light source detection can be assisted by an integrated
flicker channel that can automatically flag ambient light flicker at 50/60Hz as well as buffer data for
externally calculating other flicker frequencies up to 2kHz.

P.S. Nu-ti recomand senzorii de CCTV analog doar daca chiar n-ai ce face. Pe langa senzori mai ai nevoie dsi de alte circuite. Conversia A/D este facuta de un 'frame grabber' la care conectezi camera :) 
https://en.wikipedia.org/wiki/Frame_grabber