Here is the base for
the enclosure. Standoffs salvaged from an Apple II plus are
mounted in holes drilled and countersunk into the base. Rubber
feet are from Radio Shack and are placed over the holes that were
drilled for the standoffs. A half inch was left around the perimeter in
order to allow space to mount the supports for the top. The top's
overall dimensions were cut at the same time as the bottom. It
lies between the bottom and the table with protective paper still in
enclosure is sort of being designed on the fly. The power entry
module (transformers) will be mounted in a separate enclosure.
Material is 1/4" Plexiglas found in the remainder bin at a nearby
hardware store. Plexiglas is cut on a table saw and edges are
polished with a buffer and car polish. First thing to be built is
mounted on the base. The Mimeo's mounting holes are a very tight
fit on the standoffs. Be very careful when mounting the board on
the standoffs so that you don't damage the PCB.
I am think I want to have both vertical and horizontal display options.
- It's probably best to cut base and top to overall dimensions
(10"x16.5") and then place PCB in position and mark location of mounts
through mounting holes in PCB. Anyway that is what I did and it
worked out nicely.
and Top - I decided to take the easy way out and machined some
standoffs to hold up the top. They are screwed into the base and
top. I had some issues with cracking the Plexiglas while drilling
the holes, but it will have to do for now. I'm not up to redoing
the work right now.
The top has a cut out for the expansion slot and holes drilled for extra ventalation above the heat sink.
PS/2 keyboard adapter is mounted on a standoff mounted on the side.
There is enough space between the top and the PCB so that I can
get at chips and the video and power connector.
The New Power Entry Module (PEM)Using techniques and the same materials as the board enclosure, I built this enclosure for the transformers.
worry, it is well ventalated by leaving large gaps on the end pieces.
The wiring goes out the back directly to the motherboard.
I made it separate from the motherboard, because I may need to use it on occasion to bringup or test other motherboards.