Hey, I'm Fran
and what do you do fran
The shorter list these days is what I do not do. Google me!
Requisite shred cam and Andy from Pro Guitar Shop Dot Com:
Should we address some of the Q's on the list??
Yes that's a good start
my bad. i just assumed i would get a sentence from you since your here in the flesh.
Shulie: First up: Will you be trying to make a gemini like/style constructed EL panel as well?
I could. One benefit of this project is the acquiring of new skill sets and the tools for building all kinds of EL displays.
@dackdel Was that not a sentence?
@Fran Blanche can you go over the process of how the segment EL displays are made?
Ooooh. Let's dig into that.
yes, that was my question too
It's a chemical layering process. Essentially every EL display is a low value capacitor, so you're layering dielectric between two conductors with some phoshor in there to engergize.
I'd actually like to learn about the design decisions that resulted in those displays. Why such a complicated device? I get that Nixies would be no bueno on a rocket, but didn't they have other technologies?
^yeah what dan said
makes me think of a capacitive touch el display
@Dan Maloney they are flat and lightweight
not easy to manufacture im assuming
Were 7-segment LEDs not yet available/reliable enough?
there were no leds in 60'
El panels were used to back illuminate all the control panels in the LEM and CM. It was very new technology at the time, and weight and overall power consumption were primary reasons
1962 is when it(leds) was invented at ge to be specific
they were too dim to be practical i think
Actually, someone sent in a tip about BCD segment displays made in 1969. Links post last week:
Also for the DSKY there were so many individual digits that space dictated something like a CRT screen, and the EL panel took up far less room.
And you're still going with a silkscreen rig and ITO glass to fabricate these?
Gotcha. The constraints they worked under just fascinate me - a few grams here, a few milliwatts there; it all mattered.
ITO is the way to go nowadays, and silk screening is still the way it is done. Heat curing is essential, so there is a lot of steps in producing any one single panel.
correct me if im wrong. most EE live for a few grams, miliwatts and good coffee. i have a friend who does it and its facinating how obessed you can get.
Hey, we're almost at this question, so how about this: "can you explain the proces you had in mind to make the dsky display segments?"
Ironically the hard thing to copy in the original displays is the dark metallic face, because the original conductors were not fully transparent, rather deposited metalic layers. I think that flown DSKY displays used a form of deposited nickel for the front conductor, giving it that golden look.
The whole display is made in a single panel, so individual segements are all part of the whole.
@dackdel - Apparently not the engineers at Juiceroo: https://www.youtube.com/watch?v=hlVmppyflS0
Shulie: @Fran Blanche Next up: What inspires you? What motivates you to create?
I love old electronics, that's what always inspired me. The candy-like look of the 60's and 70's parts... the smell of real 60's transistorized boards. Nothing like it.
I loved your video about the old LED you collect :-D
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