KryoFlux floppy case

by Duboun Sep 8, 2018
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Here is the converter I used it worked great.. they are inexpensive and I got extras for other projects.. very handy.


I searched for some, but did not find any with correct dimensions.

Very nice, excellent work.

I am thinking between to use some existing external 5.25 case (universal, or some SCSI case etc), or to build this one. Benefit of ready extrnal case is that it usually can hold ready some power source that has needed MOLEX connectors.

Your DC-DC coverter is nice, as it has some PCI-E power connector ready, and you get both 12V and 5V nicely from it.

What is the size of that board? I mean if I am planning to order eg. some bunch of prototype boards, lets say 10-20 (could sell extra ones), I would need the dimensions to ask cost offer.

Are you feeding power to KryoFlux MOLEX connector from your DC-DC converter also....same time you feed floppy/disk drives? Is that actually needed?

And the front switch, where have you connected that? Is that KryoFlux firmware update or what...write-blocker pin?

Hi, the DC-DC board is 24x42mm, KryoFlux is powered from MOLEX because I wanted the LEDs on front to indicate if the unit is turned ON. The front switch is for write protect function.

Hi, did you do anything special to finish your prints? They look exactly like the old beige computer boxes.. photos look very smooth.

Hi, I took those photos with my smartphone, so the detail is not exactly DSLR quality. I haven't done anything special. Maybe just cutting off sharp edges. The color of the PLA filament is Ivory because I though it looks like slightly yellowed old plastic. I also looked for beige filament, but it comes to me as the same color as this Ivory, but named differently.

Where is fieber_holder.stl used? What's it used for? I can't see it in the actual finished product.

It is used to hold the optic fiebers against the LEDs on the kryoflux board. It's kinda visible on the 5th photo (i should have done it in a different color. It blends with the surroundings...)

Ah no it's fine I see it now, as it's partly under the board it's hard to tell, i thought that was part of the base, not that part. Thank you for answering my questions. Going to get this printed now. :)

I know you mentioned below that you didn't expect anyone to make the 12V to 5V converter, but as this is a very neat solution with it, I am making that converter, but am finding it challenging to source the PCI-E Power connector with a straight needle, where did you get yours from could you give me a link perhaps? Thank you.

Ah thanks, have ordered 10 pcb's from China, and 3 pcb's from the US, will practice on the China ones as those were dirt cheap.

It's a shame there was no blanking plate part for the 5 1/4 drive, would this be hard/time consuming for you to make perhaps I would like to see it, as I wasn't intending to have a drive in that bay, but I prefer this case to your other one.

Check the files. I made a little update.

Those look really good, thank you very much!

HI, did you have any heat issues with the case using PLA? It hasn't warped or deformed from internal heat has it? Is heat generation minimal? Wondering about PLA tolerance to heat. Thanks.

Hi, I haven't tested it this way, but I don't expect the PSU to produce much heat (should be around 5,5W). You can print it with PETG, with which I had good results.

Heya, I'm enjoying your KryoFlux boxes. Can you point me at where I can find that 12V to 5V converter you used? I like the fact that you can just plug-in a 6pin molex cable.
I need to fix the power supply of my case because it has an unbearable high electric pitch.
I've also commented with another question on the KryoFlux forum.

Hi, this converter is self-made. If anyone wants to build their own, the 2 pdf files are for PCB etching and component layout. Sorry for lack of details on this. I forgot to mention that the converter is based on LM2595, diode 1N5822, coil 68uH, 2x 100uF 25V 1x 220uF 35V (datasheet schematic) and the 6pin connector is molex 39-28-8060. But i don't think that anyone will bother with building the converter.

I'm sorry, I didn't download the files that you can get by downloading everything and therefore didn't notice that there were extra files for the converter.
Nifty thing you created there. Unfortunately I just can't build that myself :)
Thanks for your patience :)