@tubetime TI — we can even make gold rust!(tm)

@tubetime IMP-48 and SMP/80 seems interesting 70‘s home computer monitor stuff.

@tubetime you realise the world will end because each and every one of those hasn’t got something covering the windows.

@tubetime
Wouldn't it have been better to cut the pin on the component side, and bend it up to attach the signal wire to?

@tubetime "Smallest coaxial"

@tubetime I'd just have cut those two little traces left and right, or is it connected to grnd on multiple layers?

Marc has a video about his technique. i tried it with one pen but it's a bit labor intensive, and a commenter on his video found a better way!

https://www.youtube.com/watch?v=h-oj4HrTH14

@tubetime Philip Freidin modifies a pilot? pen that happens to fit almost exactly. IIRC he takes a little shave off them in a lathe. Not sure what exact pen he uses. I suspect that gives you a lot longer use time, but then the long pen won't work on a carousel.

@tubetime know of a good source on how hook one up to a modern computer? I have a big old HP plotter but I’m not really sure where to start

@tubetime And we never recovered! (I say, as a person who first joined the Internet via AOL.)

@tubetime this is far worse, devoid of any value whatsoever, at least with AOL, you got tons of free floppies.

@tubetime Today's date is September the 11,161st, 1993.

@tubetime is it not... shorted through the calipers, when held like that?

well, you probably only did it for a moment

@tubetime 🙀🤯

@tubetime I was just wondering about this a couple of days ago!

@tubetime amazing. I spent a little time on that myself a while back

@tubetime What a nice rabbit hole! I found that you can download some Mainframe music as mp3 from here for free.
http://mainframe-music.info/mainframe_music_mp3s.html

@tubetime well, here goes nothing

to get the Amiga to work with high density disks, the Commodore engineers took a little short cut and just spin the drive at half the normal RPM (150 instead of 300). this keeps the data rate the same, allowing the custom chip to remain unchanged.

@tubetime holy shit that sounds really cool I don't even own an Amiga tho...

@tubetime the solution is to get more breadboards. You never have enough for a computer project.

@tubetime breadplex

@tubetime I expect the Army received many notes from lonely radar technicians asking for Ms. "Jot down the dope" contact info. 🤷‍♂️

@tubetime

RETVRN

@tubetime I wish there was stuff like this near me. Looks like it would be so much fun.

@tubetime Added the upcoming ones to my calendar in hopes of finally checking this out sometime.

(2)

there's something weird about the markings on the bottom of the chip

@tubetime this is close to @NanoRaptor level shitposting too

@tubetime Moto undoubtably made custom chips for specific customers and wouldn’t have published docs on them. Perhaps there might be public info on part number ranges that they used for customer chips, but perhaps not. Could be interesting to reverse engineer.

@tubetime a variant of the 4055? :ablobthinkingeyes:

i cracked it open and this is what the die looks like. some sort of memory array, it could be SRAM but who knows.

@tubetime idk what it is but it looks oddly cute and i just don't know why

silly little goober of a chip uwu

@tubetime Backing data out of a 'display a/d converter' like the ICL7106?

@tubetime An oddball thing to use this is to read data from video signals that are either generated by a camera pointing precisely at a 7 segment display, or one of those early "consumer" OSD chips that use 7 segments.

@tubetime sometimes that's all you need to make one

@tubetime neat, I've always wanted to test if I could hear 1MHZ :blobcatgooglyfingerguns:

seriously though I bet that's very useful for quite a lot of different projects ranging from reviving old electronics to hardware mod overclocking to pleasantly gimmicky synthesizers

@tubetime
..but how do you..?
(reads link)
Never mind. Neat! 👍

@tubetime
Small note on the trimpot: Mouser does stock the Spark Fun trimpot. Mouser part number is 474-COM-09806.

@tubetime I love his video/editing style. I'm far from an audiophile or a collector and I still want one.

Just a great collection of facts and engineering explanation.

@tubetime It's a warning that it's poisonous, and predators shouldn't attempt to eat it.

@tubetime It has a resistance value of 3.1kOhms +/-10%

On a more serious approach, it can be test indicators. (kind of "QA Passed")

@tubetime

It's positive for COVID?

@tubetime Signetics, I would assume. Although not the most frequent logo

https://en.m.wikipedia.org/wiki/Signetics

@tubetime seems to be from Solidev, it's a "Triple 3-input NAND gate":

https://www.bg-electronics.de/datenblaetter/Schaltkreise/CM4000serie.pdf

@tubetime Shouldn't that be 2.56?

@tubetime @adistuder @brainwagon If the units are discrete (increments of 0.01 cm) then there are 256 possible values of length from 0.00 cm up to 2.55 cm. 2.56 cm would be 0x0100.

If the units are continuous (not integers) then it would range from 0.00 ≤ length < 2.56, so length up to but not including 2.56 cm. In this case, answering "how many mm are there in an 8-bit inch" is harder because there are infinitesimally less than 256, and also sort of inaccurate because that's not really 8 bits.

@tubetime am dealing with label printers at work that have 203dpi or 8dpmm ... but actually 7.99dpmm and it does my head in ... but given each label is 66mm and the error for finding the edge for the next is 0.5-2.0mm I think it is unlikely to matter much over that length ...

@tubetime I'm struggling to see how they can make it more expensive... (I've been tempted to learn how to use it but could never afford a license, I just use KiCAD for my projects)

I guess they could just be absurdly annoying and make it so certain features only work with renesas parts

@tubetime for the tourists here would you mind explaining why this is terrible? Asking for a friend!

@tubetime So what does a hobbiest license cost for the complete Cadence stack? They don't return my phone calls! 🙂