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DIY PAR meter

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mistergreen

Post subject: Re: DIY PAR meter

Posted: Tue Feb 12, 2013 12:19 pm

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Joined: Fri Nov 30, 2012 1:54 pm
Posts: 279

Oh, I don't think we mentioned this but O2Surplus build in aFTDI connection into the meter. You can get a usb/ftdi adaptor and read the values from your computer or you favorite microcontroller.

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mistergreen

Post subject: Re: DIY PAR meter

Posted: Tue Mar 05, 2013 2:07 pm

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Joined: Fri Nov 30, 2012 1:54 pm
Posts: 279

Attachments:

[phpBB Debug] PHP Warning: in file [ROOT]/includes/functions_reimg.php on line 136: preg_match_all(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/functions_reimg.php on line 138: array_unique() expects parameter 1 to be array, null given
[phpBB Debug] PHP Warning: in file [ROOT]/includes/functions_reimg.php on line 141: Invalid argument supplied for foreach()

controlP5.zip [833.49 KiB]
Downloaded 1103 times

application_windows.zip [510.2 KiB]
Downloaded 1132 times

application_macosx.zip [596.03 KiB]
Downloaded 1334 times

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mistergreen

Post subject: Re: DIY PAR meter

Posted: Mon Jul 01, 2013 6:01 pm

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Joined: Fri Nov 30, 2012 1:54 pm
Posts: 279

Just out of curiosity and some question from reefers,
I wanted to measure color bulbs to too.
I had a green bulb around so I included in the measurement too.

The bulbs.

by , on Flickr

by , on Flickr

The light

by , on Flickr

by , on Flickr

The measurements
control, 14w spiral CF white light
PAR sensor: 3" - 118.5, 6" - 44
CEP sensor: 3" - 121, 6" - 36

Blue bulb
PAR sensor: 3" - 40, 6" - 12.5
CEP sensor: 3" - 32, 6" - 7

Green bulb
PAR sensor: 3" - 29, 6" - 9.5
CEP sensor: 3" - 25, 6" - 5

Conclusion:
The cep reading isn't perfect for color lights but it's in the same ball park. It's good to see the photodiode is on par spectrally with the PAR sensor.

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sketchy

Post subject: Re: DIY PAR meter

Posted: Thu Aug 01, 2013 10:07 pm

Joined: Thu Aug 01, 2013 10:05 pm
Posts: 4

Awesome job. Can i buy one? If so, how do i go about that?

Thank you.

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mistergreen

Post subject: Re: DIY PAR meter

Posted: Sat Aug 03, 2013 8:55 am

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Joined: Fri Nov 30, 2012 1:54 pm
Posts: 279

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mistergreen

Post subject: Re: DIY PAR meter

Posted: Tue Mar 25, 2014 5:20 pm

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Joined: Fri Nov 30, 2012 1:54 pm
Posts: 279

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mistergreen

Post subject: Re: DIY PAR meter

Posted: Wed Mar 26, 2014 11:18 am

Site Admin

Joined: Fri Nov 30, 2012 1:54 pm
Posts: 279

I'll be adding 3 roscolux filters to narrow down the spectrum to the photodiode

roscolux #3410, #38, #4307
http://www.plantedtank.net/forums/showt ... 225&page=2

The firmware code will have to be adjusted.

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sketchy

Post subject: Re: DIY PAR meter

Posted: Thu Mar 27, 2014 5:51 am

Joined: Thu Aug 01, 2013 10:05 pm
Posts: 4

@MisterGreen - I just sent an email. At least for now I do not have time to set up an open Source PAR meter GitHub and other stuff to evolve.

Besides, I'd rather buy the DIY PAR meter and center expertise on you. You are doing an incredible job.

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mistergreen

Post subject: Re: DIY PAR meter

Posted: Wed Jun 18, 2014 8:11 am

Site Admin

Joined: Fri Nov 30, 2012 1:54 pm
Posts: 279

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megamind

Post subject: Re: DIY PAR meter

Posted: Wed Jul 09, 2014 2:18 pm

Joined: Wed Jul 09, 2014 2:08 pm
Posts: 1

Hi,
I am going to make the meter asap.
But i didnt find the VTB8441BH anywhere.
Can i use BPW34 sensor which is mentioned at first post here?
otherwise, can you help me where to get it ?

Thanks

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