Step 1: Materials and supplies
One 1/4" x 3.5" x 2' Red oak hobby board ($3.50) (a hint, you can get this cut to length at the store)
Twelve 1/4" Hex nuts ($1.50)
Eight 1/4" washers ($1.20)
Four 1/4" x 2" Hex bolts ($0.80)
Two #4 3/4" long machine screws (I got a pack with 8 screws and nuts) ($1.20)
Eight #4 nuts
Total cost with tax: $8.50
Power drill (or hand drill if you want to go old school)
7/64" drill bit
1/4" drill bit
Small 'C' clamp
One raspberry pi
Step 2: Getting started on the base
2) Take your sandpaper and sand down the rough edges where it was cut.
Step 3: Decision time
4) After you have done that, locate the two mounting holes on the pi and with your pencil make a mark where each is.
Step 4: Drill baby drill
6) Place your marked board on a piece of scrap wood and drill two holes in the oak board where you made the pencil marks (picture #2)
7) With that done, with the pencil mark a point 1/2" in from each edge of the corners of one of the oak pieces (picture #3)
8) Now clamp the two oak pieces together with the marks that you just made facing out (picture #4). Make sure not to clamp them together so hard that it marks the wood.
9) Put a 1/4" bit in your drill, place the oak pieces back on your scrap wood and drill 4 new holes, one for each mark that you just made.
Step 5: Assembly part 1
11) Repeat step 10 with another nut and bolt.
12) With your raspberry pi face up, place one of the screws you just assembled down through each of the pi's mounting holes.
13) Take two more #4 nuts and screw them onto the screws, lightly sandwiching the pi's board (see picture #3).
14) Once you have done that, carefully place the down on the oak piece with the smaller holes. The result should look like picture #4.
15) Upon flipping that piece over, you should see the ends of the screws sticking out (picture #5). Take two more #4 nuts and screw the pi onto the oak board (picture #6).
Step 6: Assembly part 2
17) Find your other piece of oak (the one without a raspberry pi attached to it) and decide which side you like best. With this side up, place put one of the bolts with washer through each of the corners of the board (images 1 & 2, though I forgot the washers in these pictures).
18) Next, put a 1/4" nut onto each of the bolts, and hand tighten them down, sandwiching the piece of oak (picture #3).
19) Add another washer to each bolt and screw it down part way.
20) Place this piece on the table with the bolts facing point up. Then, take the other piece of oak, and with the pi facing down, place it ontop of the other piece so the bolts go through both pieces.
21) Adjust the top nuts so that they are all at an equal height. Using three extra nuts as a way to measure this works perfectly (see picture #4).
22) At this point, things should look like picture #5. Now, on the ends of the bolts sticking out, place a washer and then another nut and hand tighten (pictures #6 & 7 respectively).
Step 7: All Done!
Some thoughts for design modifications:
1) use some sort of stain/lacquer on the wood at the beginning to bring out some more color and grain.
2) It would be really cool to laser cut or etch a design in the top of the case if you have access to such technology.
3) It would also be possible to add sides to the case using some of the remaining oak, however, I like the look of the case as it is.
I hope you guys enjoyed this. Merry building!