Tell us about yourself!
Many thanks for this project. I have a friend working on a similar idea but nothing to do with a blind partner. You may well know this, but while a raspberry Pi would chew up a lot more millamps, it can readily aplay sound 'bytes' and espeak "text". I use the former to play train sounds and the latter to announce arrivals "The train on platform one is the 12:27 from Arnprior ..." I insert the actual time from an RTC into the text string prior to making a system call so it's always "ON TIME"'. I'm afraid this early movie only plays sounds taking cues from sensors under the track.:https://www.youtube.com/watch?v=jaF-1H7u_-w
Plexiglass is prone to expansion so I think there needs to be a gap between the edge of the 'glass and the depth of the slot to prevent buckling. Might be worth mentioning.For screws going into end grain, I often grind a small flat at the point so they cut themselves a thread.I too should make a set for the porch, if only the West side. It's a place I love to sleep, watch the moon and sometimes catch a firefly, but when nights are cold I have to wear a toque, or wet enough that I'm driven inside.My 2018 all-time record for July was 29 nights out of 31! The swimming was also good.
I didn't make the computer box but I do thank you for the idea because I've had trouble getting at the back of my Debian PC which also runs a CNC machine. It's sort of cosy with the CNC Interface so mounting the PC on a slide box and screwing that to the bench just made it that much easier to access. I even remove 4" from the end bench so now I can get in and poke around at the back. My box ended up being 20" long, 8" wide and 4-1/2" high but the second-hand slides were just waiting on a workshop shelf so it all came together in a morning from scraps at the shed. I even found a brass handle!
I spend far too much time struggling around the back of my PC even to taking a photograph so I could locate Audio Out etc. This has triggered two thoughts for my situation, one to simply mount the PC on runners so I could readily move it forward or secondly build a box like yours where the back comes out of the accessible LHS. My workshop even has a couple of slides pending deployment, mind it took a while to find them and they did need dusting off! As for lights ...
It would be in the 60's I'd be working on these in drafting class working towards yet another A-level subject. That and sliced cones. Today I'd be trying to work something out using linuxcnc or openscad. I'm a far cry from cutting out anything as complicated as a turbine blade but am still intrigued by the possibilities. Thanks for the memories.