touchofgrey
Active member
Is it a PWM fan perhaps? (what model is it?) I have never messed with PWM...but I found this:
Hi Scrub: Yes it is a PWM fan. http://www.arctic-cooling.com/catalog/product_info.php?cPath=3_48_79&mID=280
I can find stuff all over that tells me how that works but nothing that says how I could use it. The wires have something to do with speed control so it seems if I got some sort of external PWM speed controller could I use those wires for control? I'll keep looking and let you know what I find.
Just finished the lightproofing and took some photos so I'll share. As mentioned, lightproofing was a challange due to the cheap ass nature of the box and warped doors. I tried bulb and foam weatherstripping and wasn't happy with either so I came up with an approach that requires light to make a 90 degree corner through foam weatherstripping to get out, which means it's not going to happen. I took a lot of photos and was thinking I could do a thread on the process if people seemed interested.
I applied a wood liner strip around the perimeter of each door and at the interior of each chamber. This allows an interior sealing surface that I can scribe to position at each location so the perfect contact is made everywhere.
Interior view of lightproofing liner strips
The box with lightproofing applied to doors and chamber perimeters.
Since the box is lightproof it's also airtight so I did a final airflow test. Taped the bag over the scrubber vent and plugged it in. Did a smoke test on the passive intakes and they were both sucking real good.
5.3 cf in 9 seconds = 35 cfm
So I'm real happy about over all ventilation and the scrubber performance resistance wise, hope it's enough area to control the smell. I'm pretty confident, 200 sq in is the equivalent surface area to a can type filter 6 inches in diameter and about 10 inches long which doesn't feel undersized for a box this size. I'll see in a few months when I get the next batch going.