DIY PAR meter based on TCS34725 color sensor

[avfv]

Last time I read article about MultispeQ device: https://royalsocietypublishing.org/doi/10.1098/rsos.160592
It contains PAR meter based on color sensor TCS34715FN, and it works very close to LiCor quantum sensor.

The clear channel of TCS34725 chip has perfect quantum response, so I build my own device:



I use blue pill (STM32F103C8T6 development board like arduino), 1.3" OLED screen and TCS34725 board.
Schematics, firmware and source code here: https://github.com/AVarfolomeev/tcs34725_par_meter2

This device support manual calibration via USB serial port, I calibrated it use luxmeter.
Only one limitation: bare sensor can't measupe PAR above 460-500 umol/m2/s, it designed to work under dark glass and has very high sensivity.

 

[Ron Reefman]

Nice DIY job

 

[mdb_talon]

I did not click the links as I am sure I would not understand them :)

Assuming it is accurate though good job that is a nice DIY for an otherwise expensive tool.