The Planted Tank Forum - View Single Post - DIY PAR meter, Yeah you heard me
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post #514 of (permalink) Old 04-14-2013, 06:26 AM
Planted Member
Join Date: Jul 2012
Location: Massachusetts
Posts: 169
i was wondering why you used a photodiode vs a phototransistor? i was looking threw products and it looks like this one:
has an very similar responce to wavelengths as the graph in your first post, its a bit cheaper too...

Last edited by genocdex; 04-14-2013 at 06:30 AM. Reason: edited for price correction
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