foone,
@foone@digipres.club avatar

This shit should be illegal
DC 12v, and then a mini-DIN-8?
WHERE DOES THE 12V GO?

kryptskiddy,

@foone it's like those old Soviet audio jacks that are like, regular-ass mono audio but are fucking 5-pin DIN connectors forsome reason lol

kkarhan,
@kkarhan@mstdn.social avatar

@kryptskiddy that's not a design but also big connectors were common as single-cable HiFi connection pripr to seperated RCA plugs...

In fact, I've seen HiFi decks from the 70s and 80s in Germany that use them...

But I've to agree with @foone that this shit should have a diagram mandatory just like Barrel Jacks do!
https://digipres.club/@foone/111093417102590435

kryptskiddy,

@kkarhan @foone oh, right. I forgot about that. in North America they've been separate RCA plugs for a really long time and were either 1/4" jacks or just bare wire you wrap around a screw prior to that lol

kkarhan,
@kkarhan@mstdn.social avatar

@kryptskiddy @foone Whereas we in Europe loved to build more complex connectors that do all the monodirectional transfers in one go.

May it be said -Sockets for , , - or & ...

kryptskiddy,

@kkarhan @foone oh god, fucking SCART, haven't seen one of those in a while.

last time I saw one was 20 years ago in Germany, actually lol

kkarhan,
@kkarhan@mstdn.social avatar

@kryptskiddy @foone is pretty awesome as it combines + + Composite + and even can do Audio...

In fact you can get 1080p60 out of a good RGB-SCART cable...

crobbler,
@crobbler@mastodon.social avatar

@foone ALL OF THEM 😈

inari,
@inari@squeaky.social avatar

@foone +12V, -12V and +8V probably there along with GND and some other BS.

foone,
@foone@digipres.club avatar

So this is for a JVC TK-1070U high resolution color video camera. It's specifically designed for computer inputs, and it boasts a 768x493 pixel CCD!

foone,
@foone@digipres.club avatar

and I'm really only going into how it works because I was opening it up and it's fucking gorgeous inside. Look at this! it's a bunch of tightly packed vertical boards!

foone,
@foone@digipres.club avatar

oh my god the bottom PCB tries to document what all the pins are for!

I NEED TO FIND WHO DESIGNED THIS SO I CAN KISS THEM

dgregor,

@foone <swoon>

foone,
@foone@digipres.club avatar

ah-ha! there's continuity from my guessed-12v line to one end of this fuse but not the other.

foone,
@foone@digipres.club avatar

Bypass the fuse, give it 12v at about 0.6A, and WE HAVE LIFE!

RainbowWarrior,

@foone woot!

foone,
@foone@digipres.club avatar

I thought I had some fuses on hand but nope, it just turns out they're somewhat-offensively-named lightbulbs. huh.

foone,
@foone@digipres.club avatar

Found the manual on the internet archive:

https://archive.org/details/manual_TK1070E_SM_JVC_EN

wonka,
@wonka@chaos.social avatar

@foone hm, I"m not entirely sure yet what voltage I should use, and whether it should be AC or DC, they could have written it in a bit more often

henryk,
@henryk@chaos.social avatar

@foone So, if 6/8 and 2/5 are 12V power and ground, I'm afraid to ask what 4 and 7 connect to.

nblr,
@nblr@chaos.social avatar

@henryk @foone They connect to Ground that is not guaranteed to have 12V potential against the 12V-plus.
DC sometimes is as weird as one would imagine AC to be.

byteborg,
@byteborg@chaos.social avatar

@nblr
Signal ground can be somewhere else in professional video. Sometimes it's all over the place. And it's no problem as long you keep power-referenced ground out of reach. So, perfectly normal, I think.
Btw... Are the 12V on different rails on the supply side (as in twin supply)?
@henryk @foone

nblr,
@nblr@chaos.social avatar

@byteborg @henryk @foone I’ve recently been to a place where +48-60V is ground and minus is triple-digits of Amperes lethal. Anything goes in the DC world.

1000millimeter,
@1000millimeter@chaos.social avatar

@nblr @byteborg @henryk @foone Are you part of the EWSD rescue team?

MenhirMike,
@MenhirMike@mastodon.social avatar

@foone The ambiguity of "GND (DC 12 V)" is upsetting.

reconbot,
@reconbot@toot.cafe avatar

@foone I'm sorry what is pin 5?

foone,
@foone@digipres.club avatar

good news: it technically works
See this output?
It's seeing a line of white dots on black.

and I'm shoving an LED strip light into the camera. So it works, it's just incredibly dark

image/png

foone,
@foone@digipres.club avatar

OH THIS FUCKER IS OUTPUTTING PAL

foone,
@foone@digipres.club avatar

why would a japanese company make a camera that I found in the US OUTPUT PAL VIDEO?

foone,
@foone@digipres.club avatar

so I'd also need to hack a connector for the auto-iris lens to get this to work. I thought I could just temporarily power it and get it to open up and let me use it fixed-iris/fixed-focus, but nope! the way it controls the iris means as soon as you remove the power, it closes

foone,
@foone@digipres.club avatar

god damn it, this was all avoidable. This camera was in a characteristic nest of wires and bodges that screamed "someone has hacked on this before, and came away unsatisfied". and this is why. The fuse is blown, the auto-iris lens is shut, and it's outputting PAL in an ex-NTSC territory.

foone,
@foone@digipres.club avatar

"I should have known better, but I did it anyway" is basically the throughline of my entire career, I guess.

dtelder,
@dtelder@mastodon.nu avatar

@foone that's why we love you

nop,

@foone these are the moments to laugh at later in life. :)

humulus,
@humulus@mastodon.social avatar

@foone FWIW, the couple of auto-iris lenses I've worked sprung closed and required a small current to stay open.

Typical application:

spinach,
@spinach@girlcock.club avatar

@foone Is it a mode switch somewhere on a board? When I did video hardware we had switches to change the frequency for PAL and NTSC.

foone,
@foone@digipres.club avatar

@spinach Nah. Looking at the docs, they don't support that. I guess because this thing is intended for computer-based imaging and not broadcast video, they figured PAL would give them higher resolution so why bother?

spinach,
@spinach@girlcock.club avatar

@foone I mean I guess but you can still run into aliasing differences that would look inconsistent next to NTSC. Only way I can see it making sense is if the same company made similar model numbers with the same board and having to support more than PAL would be more hardware design work

Genstar,
@Genstar@meow.social avatar

@foone
@spinach Horizontal or Vertical resolution you talkin'?

Genstar,
@Genstar@meow.social avatar

@foone What kind of PAL? PAL50 or PAL60 (Brazil)?

foone,
@foone@digipres.club avatar

@Genstar PAL50

Genstar,
@Genstar@meow.social avatar

@foone What do you think of PAL-N? (Is PAL but also it's compatible with the monochrome signal of NTSC)

foone,
@foone@digipres.club avatar

@Genstar no opinion, really. I don't mess around with much other than NTSC

jeawallace,

@foone PAL at 50Hz or PAL at 60? The amount of stuff I've seen emit the latter as some sort of debug/ kludge mode in the US market is surprisingly high, as it sort of matches PAL-M for Brazil, and it was a big thing to grey import tech from the likes of Florida to Brazil a decade or so ago.

foone,
@foone@digipres.club avatar
jeawallace,

@foone Yeah, that's just plain messed up then.

rasur,
@rasur@mastodon.social avatar

@foone because NTSC is.. not very good?

1000millimeter,
@1000millimeter@chaos.social avatar

@foone Because you don't have the "Never The Same Color" Problem with it :-)
Best regards from PAL and Werner Bruch home country germany.

nblr,
@nblr@chaos.social avatar

@foone AS IT SHOULD BE.

nblr,
@nblr@chaos.social avatar

@foone scnr no bad feelies.

nytpu,

@foone It is impossible to make this connector any simpler, no further comment

chickfilla,

@foone imagine the restraint it must have taken to not ground pins 1 and 3

DerWaldi,

@foone they should be labeled GND, Ground and Earth for better differentiation

andrea,
@andrea@ubuntu.social avatar

@foone redundancy ftw

FantasmitaAsex,
@FantasmitaAsex@todon.eu avatar

@foone why ? WHY ?

bytex64,
@bytex64@awesome.garden avatar

@foone Ah yes, the three genders - DC 12V, GND, and GND (DC 12V).

jbaggs,

@foone Extra Ground! MOOOR PINS!

lothus,
@lothus@mastodon.social avatar

@foone Why would you have two seemingly independent sets of 12V and 12V ground pins? (For all I know they're all just tied together inside though)

momo,

@foone
And there I wanted to joke that all pins are ground and 12V is on the shield... I was ALMOST right.

stair,

@foone Help! My fuse is glowing! 😄

mendel129,

@foone :ablobcatwave:

growf,
@growf@mastodon.org.uk avatar

@foone Surely that's only offensive when applied to a person?

Although...the first usage that comes to my mind has been renamed, it seems:

Lesdmark,

@foone Just looking at those sort of bulbs makes the end of my fingers feel burned from my childhood of trying to remove them from the dome light of a car while still on. 😂

Badscrew,

@foone lamps are just non-linear high impedance fuses.

compusar,

@foone Is the fuse blown?

th,
@th@v.st avatar

@foone it’s always appreciated when big companies include jtag labels on their products.

channelOwen,
@channelOwen@fosstodon.org avatar

@foone that unit is pretty. I hope it doesn't overheat.

RavenLuni,
@RavenLuni@furry.engineer avatar

@foone 8 chances to win :p

darryl_ramm,
@darryl_ramm@hachyderm.io avatar

@foone Following their loss in World War II, Germany launched a strategic global retaliation known as project DIN…

lunarloony,
@lunarloony@dosgame.club avatar

@foone That's easy, it's 1.5v per pin!

DarcMoughty,

@foone In the holes, silly!

nieldk,

@foone pin 4

skaverat,
@skaverat@skaverat.net avatar

@foone each pin gets 1.5V

The case is the negative pin

likesoldmacs,
@likesoldmacs@bitbang.social avatar

@foone spicy appletalk

fsphil,
@fsphil@mastodon.social avatar

@foone Maybe four pairs of 3v each.

hp,
@hp@tmm.cx avatar

@foone dealers choice!

mbaker3,

@foone 1.5V per pin of course.

sl1,

@foone outer conductor positive. All inners ground for maximum chaos

adriano,
@adriano@lile.cl avatar

@foone to the phillips screw above it is my guess.

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