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Sigh Collector

Step 3Build the Sigh Collector main unit

Build the Sigh Collector main unit
For the sake of brevity, I will not detail every step in the process of building the main unit. Suffice it to say that it can be as simple or complex as you wish; anything from cardboard and hot glue to custom fabricated or more advanced materials.

I have designed mine this way, which isn't to say it's the only way it could be done. If you care to follow or elaborate on my instructions, see the diagram below. Again, a higher resolution PDF is attached. On the diagram, you will find exact measurements and specifications on how to build the unit pictured below.

As stated in Step 2, I built mine out of shop-grade Maple plywood. It has a nice grain and cuts well. I left the surface raw.

A couple design notes:
I decided to drive all the screws in from the inside so that you wouldn't see them from the exterior. It can be tricky to sneak a drill inside of the unit, so I recommend building it in sections. I angled the bottom edges of the 2x2 frame, so that they would look a little sleeker when visible.
The top piece with the mitered corners and circular opening is removable, for easy repair of inside parts. The pump and electronics will sit inside the box, on a shelf that is held up by two of the 2x2's on the inner frame (see diagram).

The reason I built it on a frame is so that the corners would stay square. Otherwise, plywood can tend to warp. This way, also, everything can be held together by screws and therefore broken down easily into pieces.
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Author:mkontopo