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 Post subject: Re: DIY PAR meter
PostPosted: Wed Jul 09, 2014 7:58 pm 
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Joined: Fri Nov 30, 2012 1:54 pm
Posts: 275
megamind wrote:
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

Hi, I updated the first link in the first post. It should work now.


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 Post subject: Re: DIY PAR meter
PostPosted: Fri Sep 05, 2014 3:11 pm 
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Joined: Fri Sep 05, 2014 2:59 pm
Posts: 2
Hi there, I was wondering if you still sell these? :roll:

I would build it myself, but getting the parts in/to Norway, all of a sudden makes it almost as much as the Apogee sensor.
Tried to figure out how to PM you, but didn't manage too... :oops:


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 Post subject: Re: DIY PAR meter
PostPosted: Fri Sep 05, 2014 4:24 pm 
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Joined: Fri Sep 05, 2014 2:59 pm
Posts: 2
On the other hand, found all the items I need on eBay to a reasonable price, but have a hard time finding the diffusing material. Do you know of an cheap eBay alternative?
Like can I strip the diffuser from this?

http://www.ebay.com/itm/200-000-Lux-Dig ... 2584971265


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 Post subject: Re: DIY PAR meter
PostPosted: Tue Sep 30, 2014 9:14 am 
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Joined: Fri Nov 30, 2012 1:54 pm
Posts: 275
hey,
yes, I have a few meters left. PM me or email me.

No, everything is designed to work together so the diffusor from the light meter won't work.


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 Post subject: Re: DIY PAR meter
PostPosted: Wed Jan 21, 2015 2:42 pm 
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Joined: Wed Jan 21, 2015 2:35 pm
Posts: 1
Thanks to mistergreen's invaluable input
I managed to build this close enough PAR meter.
What remains is to calibrate it against fixtures with known PAR readings.

In my endeavor I included a pH sensor and used my phone's screen for reading the results.
Will return with further details later. For now, this is the sensor
Image

Once again, THANK YOU Mistergreen !!!


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 Post subject: Re: DIY PAR meter
PostPosted: Sun Jun 12, 2016 1:05 am 
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Joined: Sun Jun 12, 2016 12:50 am
Posts: 5
Hello All,

Building PAR meter, and I got a question on "Basic 16x2 Character LCD".
Can't make the background light to come up...
I got the connection diagram from part descriptions and it shows, that pin 15 is Anode
When it's off PAR meter board I apply +5V on pin 15 and it works.
My question is, can I just jump it to +5V?
it also connects to pin 12 to ATMEGA328P, i don't want to fry ATMEGA

Thanks
Aram


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 Post subject: Re: DIY PAR meter
PostPosted: Wed Jun 15, 2016 10:22 pm 
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Site Admin

Joined: Fri Nov 30, 2012 1:54 pm
Posts: 275
paronaram wrote:
Hello All,

Building PAR meter, and I got a question on "Basic 16x2 Character LCD".
Can't make the background light to come up...
I got the connection diagram from part descriptions and it shows, that pin 15 is Anode
When it's off PAR meter board I apply +5V on pin 15 and it works.
My question is, can I just jump it to +5V?
it also connects to pin 12 to ATMEGA328P, i don't want to fry ATMEGA

Thanks
Aram


Hey, what lcd are you using? You'll need to adjust schematics.


Sent from my iPad using Tapatalk HD


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 Post subject: Re: DIY PAR meter
PostPosted: Sat Jun 18, 2016 8:36 pm 
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Joined: Sun Jun 12, 2016 12:50 am
Posts: 5
Thanks for reply mistergreen.

I am using following LCD displays:

Image

Image

Thank you!


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 Post subject: Re: DIY PAR meter
PostPosted: Tue Jun 21, 2016 9:57 pm 
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Site Admin

Joined: Fri Nov 30, 2012 1:54 pm
Posts: 275
Do you have a make and model?


Sent from my iPad using Tapatalk HD


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 Post subject: Re: DIY PAR meter
PostPosted: Tue Jun 21, 2016 11:29 pm 
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Joined: Sun Jun 12, 2016 12:50 am
Posts: 5
1602 16x2 Character LCD Display Module HD44780 Controller Blue Blacklight

Item description:
LCD display module with blue blacklight.
Wide viewing angle and high contrast.
Built-in industry standard HD44780 equivalent LCD controller.
Commonly used in: copiers, fax machines, laser printers, industrial test equipment, networking equipment such as routers and storage devices.
LCM type: Characters
Can display 2-lines X 16-characters.
Operate with 5V DC.
Module dimension: 80mm x 35mm x 11mm.
Viewing area size: 64.5mm x 16mm


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