Wow that's a good quality 3d scan compared to what I can get. Is it one of the handheld type scanners or a turntable one? It loo […]
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iraito wrote on 2023-02-18, 15:29:
4: I got thanks to the kindness of acl a slot 1 mobo with a pentium 2, it's a non common form factor, so i'm planning to create a WIP thread and work on a 3d printable case for it, lucky me i work with professional 3d scanners and printers so i already have a 3d scan of the board to work with.
Wow that's a good quality 3d scan compared to what I can get. Is it one of the handheld type scanners or a turntable one? It looks like it handled scanning the reflective PCB really well, good luck with the case build 😀
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A long time ago I plugged my Citizen VIDA-15B floppy drive from the Compaq LTE Lite 4/25E into a regular 26pin floppy cable and burned out the drive. That sucked.
So of course I had to convert my Compaq LTE Lite 4/25E to a direct drive floppy! The pinout is basically the same as the Compaq SLT's Citizen OSDA-53B pinout listed here.
I had to get familiar with what connection does what and verify all of the pinout which is basically the same:
compaq-citizen-vida-15b.png
Fitting a Teac FD05-HG in the bay works really well - 3 of the 4 screw holes match up with regular floppy drives so the drive sits properly without major modification. I had to trim down the eject peg so I didn't have to trim the case.
IMG_0892 (Custom).JPG
This took a while and after getting it all together, the drive didn't work? It didn't seem to do anything and I spent ages checking I had the lines right with the oscilloscope (shoulda used logic analyser but scope is easier for these quick checks). The original Citizen VIDA-15B drive just made the computer upset since I burned out some components on it plugging it into a flat cable connector that put 5v into its sensors and things, so that was rather useless for reference.
I also spent a really long time figuring out how the connections are done on the mainboard - some of them are exposed on the docking connector which really helped, but after it didn't work I was second guessing everything and was about to go back to the drawing board.
It turned out I didn't have any pins wrong, but the flat flex cable connector I'd wired it up for had the connector pins on the other side than what I soldered it up for, argh. These are all just salvaged from dead drives so it's tough to know what's what.
Citizen-VIDA-15B-adapter-wiring.jpg
Once it was resoldered the drive has just worked! Considering the trouble that Citizen belted floppy drives have given me, a direct drive floppy on this LTE Lite is awesome. It predates PCMCIA so getting files on and off of it is otherwise a hassle.
Now the prototype works I can get some adapter PCBs made - it also means that a Gotek PCB could go in potentially.