DIY PAR meter, Yeah you heard me - Page 25 - The Planted Tank Forum
 
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post #361 of 731 (permalink) Old 05-26-2012, 07:38 PM
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I'm not sure what bulb brand they tested that's why those par charts are misleading. I found that out the hard way.
that is why i'm trying to figure this out. its pretty big diference also ican't imagine that such cheap light pulling 120 par at about 13". is there anything universal such a 60w regular light bulb should have xx par at lets say 6"? so i can test it on something else
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post #362 of 731 (permalink) Old 05-26-2012, 07:56 PM
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Go outside and test the sun maybe? That reading should be pretty uniform.
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post #363 of 731 (permalink) Old 05-26-2012, 08:21 PM Thread Starter
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I'm getting 150 par at 12" away from my old t5ho. Outside at 4pm on a partially cloudy day I'm getting 1300 par in the sun and 200-300 par in full shade.

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post #364 of 731 (permalink) Old 05-26-2012, 08:46 PM Thread Starter
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Oh, you can test it out on regular spiral cf
http://www.plantedtank.net/forums/li...tml#post837592

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post #365 of 731 (permalink) Old 05-26-2012, 08:46 PM
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full california sun 1400
full shade 200
so looks like meter is ok , but than that fishneedit light is much stronger then everybody think it is
thanks mistergreen
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post #366 of 731 (permalink) Old 05-26-2012, 08:53 PM
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good link will play with that as well now that i have this cool gadget
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post #367 of 731 (permalink) Old 05-27-2012, 01:27 AM
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I'm looking forward to getting mine next week. First tank I'll check is my cycled but flora/fauna empty 20L to see what I'll need to keep plants happy at a medium-low lighting level so I can start planting it asap. Then I'll get some shrimp. My 45 tall is over grown and I'll check what things I can tuck in the shade and what needs clear cutting around it.

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post #368 of 731 (permalink) Old 05-27-2012, 08:56 PM
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tested it today

Kudos to Mistergreen and O2surplus, and others who have contributed, for all the wonderful work put into making this device!

I finally got some time to test it this weekend on some of my fixtures.
On my 2x24 watt 24" T5HO Nova Extreme with 2 year bulbs, measured in air , I got the following PAR values:

8" from light => 150

15" from light => 50

Tried to measure in water, but notice some water in the diode cup.
Now meter is off line until cup is made air tight.
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post #369 of 731 (permalink) Old 05-27-2012, 09:47 PM
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Kudos to Mistergreen and O2surplus, and others who have contributed, for all the wonderful work put into making this device!

I finally got some time to test it this weekend on some of my fixtures.
On my 2x24 watt 24" T5HO Nova Extreme with 2 year bulbs, measured in air , I got the following PAR values:

8" from light => 150

15" from light => 50

Tried to measure in water, but notice some water in the diode cup.
Now meter is off line until cup is made air tight.

Hey- Thanks for the compliments! I'm glad to hear that you like the meter.

I got busy again today and built 6 more! This brings the total to 16 so far. I'm still waiting for some parts to arrive to finish the full 20.
Here's a photo of the meter using the DIP version of the Atmega Chip.



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post #370 of 731 (permalink) Old 05-27-2012, 09:55 PM Thread Starter
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Tried to measure in water, but notice some water in the diode cup.
Now meter is off line until cup is made air tight.
Whoops
Good catch. Good thing these sensors are easily fixed.

Let's see who can bling the meter the best!

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post #371 of 731 (permalink) Old 05-28-2012, 09:44 PM Thread Starter
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We're going to have to give you a new nickname/handle. How about ,'2quickWithSolderGun'.

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post #372 of 731 (permalink) Old 05-28-2012, 11:08 PM
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Can I get these parts at a local Radio Shack?

Anyone have locally available source store?, I don't order online
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post #373 of 731 (permalink) Old 05-28-2012, 11:14 PM Thread Starter
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Can I get these parts at a local Radio Shack?

Anyone have locally available source store?, I don't order online
Yes, you can. They sell an arduino kit at radio shack. Your only problem is getting the diffuser and photodiode. It's online only.

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post #374 of 731 (permalink) Old 05-29-2012, 05:27 PM
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We're going to have to give you a new nickname/handle. How about ,'2quickWithSolderGun'.
HaHa That's a good one! Can you do that? I like 'Addicted to Solder Fumes' for my handle. I finished soldering 4 more last night! All I need now are the pin headers for the LCD screens and I'll be done with this batch of 20.
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post #375 of 731 (permalink) Old 05-29-2012, 05:50 PM
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Anybody have any ideas on a good DIY case for the meter? Still working good no leaks.
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