@fozztexx@fozztexx.com
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fozztexx

@fozztexx@fozztexx.com

Fascinated by technology whether it is from the future or the past. #Maker of many things. http://RetroBattlestations.com & http://Insentricity.com

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fozztexx, to retrocomputing
@fozztexx@fozztexx.com avatar

Happy birthday to the computer! Can you spot all the easter eggs I've hidden in this photo?

fozztexx, to VintageComputing
@fozztexx@fozztexx.com avatar

What was the last printed magazine article to publish detailed plans for building your own computer, and when was it? 1990s? Early ‘80s? I’m talking about plans with detailed schematics and PCB layouts, like the Mark-8 or COSMAC ELF. #VintageComputing #RetroComputing

polpo, to random
@polpo@bitbang.social avatar

In my abundant free time, I want to make a phone app optimized for taking photo or video of CRTs, with quick access to shutter speeds of 1/25, 1/29.97, 1/30, 1/50, 1/59.94, and 1/60 of a second. I've tried so many camera apps with manual settings and each one has annoyances or too many settings.

fozztexx,
@fozztexx@fozztexx.com avatar

@polpo @root42 please add in a way to synchronize it to the CRT vblank so there won’t be any banding. 😛

fozztexx, to woodworking
@fozztexx@fozztexx.com avatar

For the last couple of days I've been working on an #OpenSCAD program to create custom #Pantorouter tenons. Set the tenon dimensions, the inner bit/bearing, outer bit/bearing, rows/columns, and it does all the math. But after printing out a full size paper preview I think what I want to do is going to be much bigger than the Pantorouter can handle. #woodworking

Paper printout on 8.5x11 paper with full size tenons filling entire sheet

fozztexx,
@fozztexx@fozztexx.com avatar

Made a test print with a single tenon template. Taper on the outside printed amazingly well, was expecting much worse stepping.

Template is sized to make a 1" x 2” mortise & tenon. Both are configured to use 1/2" bit and 10mm bearing and make 1/4" radius corners.

image/jpeg

fozztexx,
@fozztexx@fozztexx.com avatar

First thing is to cut the mortise. Size is very close to what it should be. Not perfect but all that really matters is if the tenon will fit.

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image/jpeg

fozztexx,
@fozztexx@fozztexx.com avatar

Next is cutting the tenon. Looks pretty good! Doesn't quite fit on the first try, but that shouldn't be a problem.

image/jpeg

fozztexx,
@fozztexx@fozztexx.com avatar

After sliding the bearing along the taper to make the tenon smaller, it almost fits! Did have to go all the way to the edge, I think the taper angle should probably be steeper. And I couldn't quite get the length to fit. Probably should do that stepped interior like the included templates do.

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fozztexx,
@fozztexx@fozztexx.com avatar

I was able to force it together with a hammer though.

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fozztexx,
@fozztexx@fozztexx.com avatar

Increased the taper from 5 degrees to 8 degrees and added inner steps with a 2mm offset on each. I guess I'll have to print it to really test it, and it takes 2 hours to print. If only 3D printing was faster. (My printer is a FlashForge Creator Pro from 2015.)

fozztexx,
@fozztexx@fozztexx.com avatar

8 degrees wasn’t enough. Had to go all the way to the edge and it’s a very tight fit. I’d like to get a good fit without needing to go much past halfway. Also had to use the longest mortise.

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fozztexx,
@fozztexx@fozztexx.com avatar

After tweaking the mortise side of the template I finally got something that works! I had to use the second step of the mortise and halfway down the taper for the tenon, but it fits easily.

video/mp4

fozztexx,
@fozztexx@fozztexx.com avatar

Goofing around with adding labels to the template so I don't forget what it is and what bearings/bits it needs. Would love to have an OpenSCAD function that can see if a value is an even multiple of eighth inches and convert to a reduced fraction so it could print 1/2” instead of 12.7 or 3/4” instead of 19.05.

fozztexx,
@fozztexx@fozztexx.com avatar

Fancy.

fozztexx,
@fozztexx@fozztexx.com avatar

Another feature that might be useful
Is a center mark along the top edge, but not sure how I’d do that without making a dent that the bearing would hit.

fozztexx,
@fozztexx@fozztexx.com avatar

@moira It's a dual extruder so in theory I could print the mark with a different color. But using the dual extruder is a major pain. But you're right, all I need to do is fill the mark. Might be able to just use a bit of clear or different colored glue.

fozztexx,
@fozztexx@fozztexx.com avatar

@moira @NF6X I'm probably overthinking it. Who cares if there's a tiny dent that gets transferred to the tenon in the center? It’s just more space for glue!

foone, to random
@foone@digipres.club avatar

I'm gonna see if I can get my raspi to boot from a spinning rust drive. Why not?

fozztexx,
@fozztexx@fozztexx.com avatar

@foone 50 pin, 34 pin, or 40 pin?

thomasfuchs, to random
@thomasfuchs@hachyderm.io avatar

Anyone here into pocket pcs? Looking for a early 2000s combination of e.g. iPaq and a camera sleeve or card; ideally something that I can still get a new or rebuilt battery for

fozztexx,
@fozztexx@fozztexx.com avatar

@thomasfuchs these? They don’t look like they take a replaceable battery. I remember having power supplies and more of them.

image/jpeg

fozztexx, to random
@fozztexx@fozztexx.com avatar

Hate those fake updates from USPS where their computer sees that nothing has happened for a couple of days and inserts some generic "oh, we've totally put it on a truck and it's heading to you!” It has been sitting there for 3 days! Definitely not arriving today. 😔

fozztexx,
@fozztexx@fozztexx.com avatar

Doing some searching about how a diode in reverse can be used as a voltage regulator leads me to Zener diodes. Looking at D22-D26, D26 has a black stripe while the rest all have green stripes. D26 must be a zener diode.

If I lift D26, will that prevent the +5V rail from coming up? Will something else on the power supply blow up without it?

fozztexx,
@fozztexx@fozztexx.com avatar

@kwf without D26 connected how would anything get to the +5V rail?

fozztexx,
@fozztexx@fozztexx.com avatar

@kwf This is what I've drawn so far.

fozztexx,
@fozztexx@fozztexx.com avatar

@kwf Nice catch! They are connected from D27 to the junction of L5 and RV2.

fozztexx,
@fozztexx@fozztexx.com avatar

Remembered I had a big variac. I was able to get the power supply to start by slowly bringing up the AC voltage. It’s hard to repeat, but I was able to do it more than once.

Not sure what that tells me though.

#electronics #electronicsrepair #RetroComputing #VintageComputing

fozztexx,
@fozztexx@fozztexx.com avatar

Sometimes those impulse purchases turn out to be pretty handy. Bought this endoscope several months ago and it has just been sitting around. Can see the labels without having to tear all the components off. #electronics #electronicsrepair #RetroComputing #VintageComputing

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