Par meters

churchhaze said:

Something like that.

Click to expand...

I have this from Keyes for my Arduino, just a LDR in series....and it outputs lux although I am trying to solder my Bf1750 Lux sensor 2nite actually to calibrate....but I am hesitant to use these for a DIY PAR meter's guts....

The problem from what I have read is that the typical Light dependent resistor isn't great for PAR measurement without filtering significantly....

Micro-spectrometer...
http://www.hamamatsu.com/jp/en/C12666MA.html

Breakout board for Arduino...
http://hackaday.io/project/4141-c12666ma-micro-spectrometer
https://www.tindie.com/products/PureEngineering/arduino-c12666ma-micro-spectrometer-/

Wow! $300

There is no end....to the money to spend.

Doer said:

Wow! $300

There is no end....to the money to spend.

Click to expand...

That caused me to pause. One might as well just use the CCD in one's cellphone, instead.

Makes you wonder how anybody grew anything in the past without these new gadgets. just lucky I guess .

Religions do quite well without science. There will always be old school.

It is the baseline.

heckler73 said:

That caused me to pause. One might as well just use the CCD in one's cellphone, instead.

Click to expand...

Right. You still have to write an app.

Doer said:

Right. You still have to write an app.

Click to expand...

Not really...there are apps circulating amongst academia which will fit the bill and are used to introduce spectroscopy to early undergrads. They still require some type of diffraction grating, but I happen to have plenty lying around which I scooped from a Chemistry lecture (other people were dumb and just left them behind...those fools).

Software link:
http://www.asdlib.org/onlineArticles/elabware/Scheeline_Kelly_Spectrophotometer/