DIY PAR meter, Yeah you heard me - Page 13
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Old 02-18-2012, 09:29 PM   #181
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No waiting list. I'll post the item on the swap & shop.
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Old 02-19-2012, 01:35 AM   #182
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I'll be trying to watch the SnS like a hawk then.. Are you only making 10 of these, or more than that?

Also, have you had an opportunity to compare your photodiode to the apogee with reef type lighting or blue/RB leds? It would be nice to know if it could also be useful for checking reef lights as well as planted tank stuff.
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Old 02-19-2012, 04:17 AM   #183
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We'll start with 10. Baby steps
Theoretically it should work with any fluorescents.
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Old 02-19-2012, 04:26 AM   #184
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Very interesting!
Subscribed too!!
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Old 02-24-2012, 04:30 AM   #185
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Update - PCB's have been manufactured and shipped and I have enough parts on hand to build the first batch of ten. I'll start soldering just as soon as the boards arrive
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Old 02-29-2012, 04:05 AM   #186
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Well everybody, so far so good. The PCB's arrived last night, so I spent a few minutes this evening soldering up a unit and flashing it with MISTERGREEN'S Firmware. I'll be mailing this one out to MISTERGREEN for calibration and testing.

Take a look- the first photo shows the main board and the LCD. The second shows the completed unit up and running. Pretty cool huh!




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Old 02-29-2012, 06:12 PM   #187
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That's very tight looking.
Don't forget the barrel jack
If not, I can find one at radioshack or something.

It took you a few minutes! That's mighty good. It took me an hour to solder up the prototype.
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Old 02-29-2012, 06:56 PM   #188
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Quote:
Originally Posted by mistergreen View Post
That's very tight looking.
Don't forget the barrel jack
If not, I can find one at radioshack or something.

It took you a few minutes! That's mighty good. It took me an hour to solder up the prototype.
Haha - Maybe more like 15 minutes! That's what makes using an actual printed circuit board worth the money! The barrel jack is out of view because it's mounted to the bottom of the PCB. I used a 2.1mm DC barrel jack because they're a fairly common size and easy to source. I think we'll have to standardize the length of the sensor cable (I'm thinking 6' should be plenty) prior to calibration, so that PAR readings will not vary (between par sensors), due to differences in cable length, #of wire strands, ect..

I'll be dropping this unit and an appropriate cable in the mail for you sometime this week. All you have to do is attach the diode and calibrate the unit. Let me know if we have a winner and I'll "spend a few minutes" soldering up some more.
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Old 02-29-2012, 07:46 PM   #189
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Good point on the cable length. I have a roll of ethernet cable I can use. The cable is round so I can use a cable grip on it when attaching the sensor housing, makes a water-tight seal.
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Old 02-29-2012, 10:17 PM   #190
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looking good cant wait till there for sale i need one for my fresh and saltwater tank
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Old 03-01-2012, 03:52 AM   #191
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I'm pretty excited too. I was thinking about how these would react to blue LEDs (like checking reef tank PAR), and I bet they'll be pretty close. No way to tell until somebody tries it, though.
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Old 03-01-2012, 01:37 PM   #192
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i am looking forward to how this turns out. I would not mind a low cost meter.
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Old 03-01-2012, 06:48 PM   #193
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This is amazing how well this project is turning out. I'll have to set aside some bux to jump on one as they'll go fast once listed in the SnS.
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Old 03-09-2012, 09:12 PM   #194
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Subscribed!!

And I only registered to this site, to get in on one!! I'm salty (Reef Tanks)

ANY Chance you can let everyone know when they are posted as "available"??
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Old 03-09-2012, 09:45 PM   #195
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Quote:
Originally Posted by JohnnyAirtime View Post
Subscribed!!

And I only registered to this site, to get in on one!! I'm salty (Reef Tanks)

ANY Chance you can let everyone know when they are posted as "available"??
Nice!

O2Surplus sent one in the mail. I'll get it by next week.
I'll let you (all) know when it's available on the S&S. Or maybe I'll keep the first one for sentimental reasons
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