Build an electroluminescent glass panel display -- an Apollo DSKY

How to build a replica DSKY unit using an electroluminescent driver circuit and screen-printed conductive ink.
Source code, PCB files, screen print graphics, etc:
github.com/benkrasnow/DSKY_EL...
Other folks in the community have been working on authentic DSKY replicas, notably, Fran Blanche: hackaday.com/2017/05/29/re-cr... • Updates, More 45's, DS...
/ appliedscience

[@goatarse]

Applied Science chooses to build an electroluminescent display and build the other things, not because it is easy, but because it is hard!

[@Rouverius]

I understood that reference

[@williamgraham8319]

Very clever comment and project

[@whocares.20]

@@williamgraham8319 Lol, love it. I have seen more cool involved projects completed from him than anyone on the planet. Applied Science builds florescent displays, electron microscopes, etc., we figure out why weed whacker won't start. :)

[@sunside79334]

goat comment, wd.

[@jefdamen2977]

People like him are the real heroes of the world.

[@johnyoungquist6540]

Some more EL folklore. In the 70's one of the ways we luminescent material was to add the zinc sulfide based powder to polyethylene and extrude it like a plastic bag. It was 4 ft wide and 3000 ft long. We could make a few colors like green or blue. We sought out the blue because it would excite a secondary emitter screened on the front of the panel. The secondary emitter was basically day-glow paint that would absorb the blue and re-emit another color. We could silk screen multi-color images on the blue panel and get a wide range of colors you could never get by EL chemistry. We even used color separation and the dot method used to print color pictures in news papers. You could have a full color photographic images. The silk screen process lacked the precision for consistent results but we did on a few occasions get great results. One application for large panels was to put billboard advertising on transport trucks. We did tile an entire dance floor with flashing 2 ft square tiles. The panels regardless of the size were all capacitive and thus hard to drive. We drove them in the low Khz range in resonance with an inductor. Decades before power mosfets we used bipolar transistors or SCRs in the inverters which ran directly from rectified line voltage. I haven't thought much about this for decades. It was my high school job.

[@SuperAWaC]

you wouldn't happen to have any patents for those specific extruders, would you?

[@johnyoungquist6540]

@@SuperAWaC I don't recall a lot from 5 decades ago. There were no patents. The process was done in secret by a company that made plastic sheet. It didn't take too long to get a successful result. We made many panels from a 3000ft long roll. I think it was just ordinary poly plastic bag material.

[@chrisfuller1268]

Cool! Please do a video detailing the process!!

[@Nighthawkinlight]

Every one of your projects these last months have been more ambitious than any one thing I have ever attempted. I don't know how you do it. Completely awesome.

[@wileecoyoti]

You're no slouch either!

[@BEdmonson85]

@@Flaakk Oh yeah, and what sort of projects are you doing? Oh, you haven't done any? piss off

[@edgeeffect]

Ryan complimenting NightHawk complimenting Ben.... I feel like Wayne and Garth bowing before Alice "we're not worthy, we're not worthy" ;)

[@eelcohoogendoorn8044]

​@@Flaakk yeah, Ben's projects are arguably unparalleled in depth and uniqueness anywhere on the internet. Seems like a poor reason to dump on any other creators agreeing with that sentiment. For what its worth, i've gotten a ton of inspiration and ideas from NightHawk's excellent presentations of his projects. Yes, maybe I could have gained an appreciation somewhere else for how a piston valve works; but I learned it from him, to name one example of many.

[@Nighthawkinlight]

@@FlaakkIt makes me sad that you believe that about my videos. I've worked hard to be transparent about any ideas that come from outside sources. Whenever I build a project based heavily on any one source I say so, both in the video itself and suggesting people check out the source link in the video description. If no such source exists in one of my videos it is because the idea came into my own head while working on some unrelated thing. Similarities in that case to any existing projects are coincidence.

[@EEVblog]

Epic!

[@schitlipz]

Wow! Definitely high praise. Guess I'm gonna definitely watch! (Woulda anyway).

[@TommyBoy7Heads]

As I was watching this, I was thinking "Damn, I wish I could see Dave's reaction video to this."

[@willynebula6193]

Exactly what i was going to say Dave. Epic, epic indeed!

[@nrdesign1991]

Makes me wonder if you'd have your next Multimeter have an EL display, just because you could.

[@TheDrunkenMug]

@@nrdesign1991 yea Dave please build us an green-blue EL Digital multimeter with an uA range measurement function, and then call it the 'Apollo precision DMM' :D

[@FranLab]

Well Ben - you beat me to the goal for an EL DSKY display. Hats off to you. Should I even continue with mine I wonder....

[@ahensley]

Please do!! I don't think Ben went to the Smithsonian to get original measurements and I imagine you had different ideas for driving it. I love both of your projects!

[@adamwiess]

I think you should keep working on yours. If memory serves you were working on an authentic driver using micro relays this board uses modern IC driver, but maybe it makes sense to focus on recreating the driver and combine it with this EL display board.

[@wileecoyoti]

More the better, I think lots of us watch both of you and would love to see your take!

[@PiotrEsdenTempski]

I think you should still do it. As far as I understand your goal is to be as close to the original as possible. I think it is worth pursuing. :)

[@2soldierman2]

I think he should give you a screen. I was wondering how long it would take you to find this.

[@snazzlebaz125]

You are on a whole other level. Insanely impressive!

[@wobblysauce]

+

[@SireSquish]

This is the guy that CT'd a frozen chicken in his garage using old parts from eBay. On a whole other level is putting it lightly.

[@esdblog6100]

Well he is just an engineer. We do things like this everyday, but nobody cares. That is funniest part of profession.

[@Manticore1956]

@@esdblog6100 Engineers are for the most part, taken for granted by our society. You will see TV shows about doctors, lawyers, police, etc., but one about engineers and what they do is doubtful. The details are just not fodder for the "emotional" rush required by mainstream entertainment. However, one movie called "Quest for Fire" about pre-historic man, made a large point of show casing a tribe that had made huge engineering leaps over another tribe. The "engineering" tribe had developed ways to make fire by artificial means, pottery for food storage, advanced weapons (atlatl), and constructed shelters. Yes, the first leaps were made by people who took raw materials, and re-purposed them to solve a particular problem. i.e. Engineers.

[@CuriousMarc]

Just wow! That is awesomely impressive! Congratulations on surmounting so many obstacles!

[@Megabobster]

I saw the title and immediately thought of you and your channel!

[@Frisenette]

Now you *can* invite Adam in his Apollo suit!

[@timothybarney7257]

I was going to suggest you two hook up. He did an EL DSKY and you have the Apollo AGC to drive it!

[@913WildCat]

Please collaborate

[@rkan2]

@@913WildCat They already can since everything is open source.. I'd love to see the KZbin collaboration too.

[@johnyoungquist6540]

In 1972 I developed a large format 5 x 7 dot matrix EL display digits. About 4 x 6 inches in size. Each half inch square dot had storage and was driven by sort of an R-S flip flop made from cad sulfide photo cells. I had cell arrays made on anodized aluminum foil. Illumination from the back of the EL pixel turned on a cad cell which drove that cell forming a latched driver. We powered down the whole digit to clear it. We couldn't justify 35 drivers or 35 wires for every digit. Multiplexing resulted in too small a duty cycle for any reasonable brightness. A second photo cell on the back of the foil in parallel with the front one was used to trigger the latch. That was driven by a multiplexed EL array which didn't have to be fast or bright. A single scan from this array wrote data to the display which was latched. We struggled to drive these high voltage AC displays in the 70's but the photo cells did it. I used an Intel 8008 processor to drive the system. It was a lot harder in those days.

[@godfreypoon5148]

That's pretty epic!!

[@jeffro.]

I'll bet it really WAS harder in those days! I remember a grad student (in the department I was working in those days) fussing with both an 8008 and a 8080A trying to accomplish some strict timing issues on a totally different project, he was really having a hard time getting things to work the way he needed them to. It wasn't his programming skills, it was limitations of the tech at the time, sort of like the "protection diodes" built into Ben's driver chip--that are really just "artifacts of the manufacturing process" that are claimed (by the manufacturer) to be "protection diodes!"

[@envisionelectronics]

These HV chips were designed by Mead then Diconix (now Kodak) and originally produced by HP in the 1970s to drive an electrostatic inkjet printer known as the Dijit. The problems you experienced with the diodes were known to the engineers and I recall the explanation was a limitation of the silicon...

[@renakunisaki]

So the manufacturers know this feature doesn't work, but continue to include it and advertise it?

[@mikebrown7366]

I think a lot of these "protection diodes" are more artifacts of the PN silicon stacking process during manufacturing, and less "engineered" diodes having usable specifications.

[@absurdengineering]

I figure these chips are harder to use than just plain old H-bridges you can get in SOT-23…

[@w6wdh]

Aaron H The HV507 drivers were used in an electrostatic printer project I worked on 5 years ago. My solution to keep the HV507s from being zapped was to put a megohm resistor in series with each electrode line. The individual electrode capacitance was small, so the added resistance didn’t adversely affect the settling time. The current is limited to 300V/1Mohm = 300 microamps. And yes, before this change, I had a tray of HV507 ICs and a Metcal soldering iron, and got really good at rework.

[@jstro-hobbytech]

​@@w6wdhany idea what the build costs in total? I can't afford nvm haha

[@MLGJuggernautgaming]

I like how he's giving tips as if I'm actually able to try this myself

[@PiRatZii]

if only this kind of media had been available on cable networks when i was a kid... the absolute peak of edutainment was modern marvels. this guy is something else, a pillar of modern society.

[@2.7petabytes]

37 people so far that hate bioluminescence?! I never understand people’s displeasure with someone that works so hard and produces such interesting videos!

[@iainmackenzieUK]

As a physics teacher: I am greatly impressed by your application of so many skills. But in this video, in particular, grateful that you shared the problems, your frustrations, patience AND solutions. This is, indeed, great modelling of problem solving for my students. Many thanks

[@britzwickit]

as always, im baffled by the amount of effort you put in every single video. Makes for a stark contrast to most youtubers. I can't say i'll build one, but i certantly enjoyed watching

[@bernardo00124719]

me too. its so sexy.

[@RexusKing]

It's a balance, "effort for a single video" vs "upload frequency". I like both types of KZbinrs, but I'm so glad there's a place for both of them.

[@utkua]

I do not think he is not doing any of these for a video, he does what he does and video is just the way he documents it.

[@jeffro.]

Yeah, I agree with the OP. This is an awesome project, but I can't imaging that I would ever attempt it!

[@TrueNorth1970]

As EEvblog said: EPIC! This video should have a million views ! Thank you from Oslo, Norway!

[@electronicsNmore]

You don't upload videos too often, but when you do they're good. :-)

[@ChristmasEve777]

Thanks to Applied Science, I make liquid oxygen and liquid nitrogen on demand in my basement! So far I have not attempted to replicate any of his other projects :)

[@sheep1ewe]

We certanly do need more guys like Ben that can show other people the way to go and how to act mature and intelligent, people like Ben certanly does not grow on trees on KZbin i agree with that.

[@thejosheb]

'Squashing a bug that's consumed 10 or 20 hours of your life is pretty enjoyable in theory.' Best line ever.

[@cmdraftbrn]

programming is a harsh mistress.

[@BrightBlueJim]

@@cmdraftbrn I see what you did there.

[@BassMeister17]

By chance, are you involved with CuriousMarc's project to restore an Apollo Guidance Computer, including the DSKY? If not, I have a feeling he and the team he's working with might be interested in your notes.

[@More_Row]

Interesting

[@budude2]

FranLab was working on the same thing a while back and had completed silk screen work as I recall.

[@dr.strangelove5622]

This is the same thought that came to my mind when I watched this video. Both channels are pretty interesting.

[@CuriousMarc]

Ahem. My only contribution to the project was pestering Ben if he could do it, just the display maybe, without the driver. And forwarding the original NASA DSKY files we (we as in Mike) had unearthed at NARA. Then like the rest of you I got the occasional updates, but knowing what he was trying to eventually do... I did not expect this to get engineered all the way to this level! Just, wow!

[@JBFromOZ]

@@CuriousMarc yeah this is next level impressive...

[@LaOwlett]

In the 90's my mom bought these hallway nightlights that were flat electroluminescent. I thought they were amazing, and the color reminded me of the light in an old stereo with analog dials. Decades later I saw youtube videos of bioluminescence in the ocean and immediately remembered those flat panel plug in lights. I never knew what it was called but now I do! There's something about that light that draws me in.

[@GoldSrc_]

Can't wait to see how much brighter it can get. Keep up the good work.

[@vebulous]

26:49 unforseen consequences

[@wileecoyoti]

This is some beautiful work you've done: I've seen one of the originals in person and was always fascinated by them. Glad I'm not the only one!

[@SergeiKotikov]

I go here to see unimaginable things done in a garage. I feel like I should be prepared for this after that electron scanning microscope build but I still get surprised every time. Great job and thanks for sharing!

[@jurivlk5433]

Guys like you will be needed in the future for repairing the stuff of today. Imagine someone who wants to drive his Tesla in 20 years as an Oldtimer! You're a genius.

[@wa4aos]

In My MANY years watching Science and Engineering material on KZbin, this was by far the most impressive combination of ideas and innovations by way of defeat and victory yet; I am in awe !!! Thank You Professor Ben !!! Also thanks to CuriousMarc and his restoration of the Apollo Guidance system !!

[@DrakkarCalethiel]

Its 2:22 AM should get some sleep, nah, Applied Science uploaded another almost 1/2 hour long vid! Really love those long ones. Especially the in-depth ones!

[@QuanrumPresence]

As an electrical engineer this is one of the most amazing debug video's I have been through. I went into software and digital, but this might get me back to making some circuits

[@3amali1]

If anything to be learnt from this video it will be the fact that science is all about patience! I love how patient and determined you were in doing this. Big thump up!

[@vinitshandilya]

Teach me master! I cannot possibly imagine how much work went into this project. From screen printing the displays to whipping up a custom driver board! This was insanely epic! That's also what makes me love vintage electronics.

[@RobertMilesAI]

Did Fran put you up to this?

[@DH-vh8el]

kzbin.info/door/fIJOyTKtSbfdXu9762CdIg watch this first, you may want change your comment

[@UltraGamma25]

@@DH-vh8el it's a joke

[@pederb82]

He is stealing her project. What a shame. And he does it with modern components too.

[@dufflepod]

Superb pulling together of a load of different skills. Congratulations.

[@monad_tcp]

And when I said I wanted to learn all those kinds of things (manufacturing, cad, electronics, computer programming), people said it was impossible or that you can't be good at all of them. No, it's possible, now I know, it's only hard. You're my inspiration and I should get rid of people that say we can't do it.

[@sjm4306]

This is such a neat project. Great job working through all the technical problems to arrive at a gorgeous working display! I could imagine a neat clock being built with one of these displays.

[@letsgocamping88]

You’re a one man R&D department.

[@EnergeticWaves]

Most of them are!

[@JimNichols]

Into the video 2.5 minutes and was laughing at the "spending 20 hours squashing bugs is enjoyable, in theory" . I think all true programmers, engineers and hackers feel this way, I have given up so many times working on a program only to walk away get half way across the room and go "what if we did this?" I would point out that anyone capable of doing this project would enjoy the "bug squashing" part much more than a puzzle labeled part 1, part 2, part 3.... just my humble opinion.

[@userPrehistoricman]

I love debugging but this drive to do it definitely depends on the tools available. A couple of months ago I was debugging some code for an old chip that I didn't have any manual for and no tools for. The feedback I got was "working", "half-working" and "not working". It's sometimes easier to start again rather than chase bugs :(

[@AttilaAsztalos]

Finding a bug is certainly an exhilarating moment, but more in the way finally letting your dick out of the vice would be, to use an AvE reference. I do debugging when needed but definitely wouldn't do it "for pleasure"...

[@BrightBlueJim]

@@AttilaAsztalos ...as in, "it feels so good when I stop."

[@AnatoFIN]

I hate it when I wake up at night and have an idea how to solve difficult problem. Good luck getting sleep before trying it out 4 am.

[@jeffro.]

I'd have to agree with these replies. I enjoy fixing problems in things I've designed & built, but only AFTER I fixed them. I'd MUCH rather have things work right the very first time I powered them up! (Yeah, "it feels so good when I stop!" Ha!)

[@DarrenHughes-Hybrid]

Wow! This project is so cool on many levels, from the Apollo aspect to elaborate electroluminescent control. Thank you for sharing this with us and thinking we could do something at this level!

[@flomojo2u]

Amazing amount of effort to conquer these extremely subtle and difficult bugs, I thought for sure you’d have a hardware solution to the segment drive exploding issue, so producing a clean and clever software fix is very impressive.

[@sprengstoffman]

I can't get enough of your content, awesome video, i pay a lot of respect for your knowledge

[@samykamkar]

Looks great, and very interesting breakdown!

[@codebeat4192]

The electronics troubleshoot part is amazing, very interesting. The amount of effort you put into this, wow.

[@letsgocamping88]

Always blown away by the detailed engineering that goes into your videos.

[@HuygensOptics]

It's a pity that there is no Nobel Prize category for applied science....

[@kevinreardon2558]

I'm guessing you're talking with CuriousMarc. By the way, it was folks like you who got is to the Moon. Decades ago I got introduced to a J--K flip flop and very few younger guys even know what it is. Its great to see someone who is stretching my understanding of analog circuits. Thanks.

[@goodi2k7]

Your work is, as always, absolutely amazing! So much effort and detail, just wow.

[@linuxuberuser]

You have done the electric community a public service. One of Many! Thank You And a very cool project. Building a DSKY display is on my bucket list, you might have saved your fellow nerd a few hundred dollars before figuring out this crazy solution or just plain giving up. Thanks Again; A very cool design

[@MichaelMantion]

"...so we're actually with in specs, which is nice." Nuff said

[@grendelum]

5:03 I just happened to be at this point when I saw your comment ;-)

[@renakunisaki]

And it still blows up!

[@Lostpanda123]

Honestly i don't understand 99,9% of the content on this channel, but still I get so fascinated!

[@preiter20]

Right with you

[@tristanbarbour9769]

Fantastic project. Your engineering of this is first class. Wish these were commercially available. Superb!

[@nickwilmshurst8396]

Thank you for doing these experiments so that I can learn without the time and resources and errr... skills that you have access to. From chemistry to electronics, you tinker like I do, but bring it to a new level. Your videos save me a lifetime of work. Cheers!

[@CraigHollabaugh]

Wow! I'm sure after you blew out 10 or so HV507s at $14 each, you got really determined to win and you did! Congrats, thanks for the detailed debugging discussion. I hope your getting a little Microchip kickback because I suspect they'll be selling a bunch of HV507s in the coming months.

[@IDoNotLikeHandlesOnYT]

Or not, now that we all know they don't have working protection diodes.

[@sjm4306]

@@IDoNotLikeHandlesOnYT It's not that they don't have working protection diodes, it is that the scenario exceeded their specifications. Protection diodes are really only meant to clamp/dissipate short relatively low energy impulse bursts like static shocks, not to be able to take the brunt of a large overvoltage. It is like complaining that the body diode of a fet cant sustain the full forward current for a significant amount of time ... because it was never meant to.

[@____________________________.x]

That was some hardcore fault finding, I imagine you were rather pleased with yourself at cracking that one 😎

[@kurtschaefer]

Wow, you really pushed though a lot of obstacles on this one. The resulting DSKY is mind blowing. Great work!

[@1230986666]

I like this video a lot. You have a nice, soothing voice that's easy to follow. I'm glad this was in my recommended videos.

[@ipissed]

"you learn something and feel good about it". SCIENCE ❗️

[@johnrickard8512]

Hmm...I always thought the DSKY was a VFD. You learn something new every day!

[@FrozenHaxor]

I thought for sure it used early dim green LEDs. What a surprise!

[@gvii]

I absolutely adore those. They are absolutely fantastic, just amazing work. I really wish I had the stuff to do that, but it's a bit out of my reach. But hats off to you, those are some of the coolest displays I've ever seen and really bring back memories. And yes, these are far, far better than any phone app. You can get apps that look neat, but it's impossible to make one that looks the anywhere near the original displays. I watched and was really intrigued by all your videos on this paint, but seeing this as the final product just completely blew me away.

[@donmoore5716]

Excellent description of the techniques you developed/used, and gotchas. Sweet!

[@tonysfun]

Great project! You are a very interesting person - I wish you are my neighbor! Thanks for sharing your projects!

[@justpaulo]

Power electronics is quite painful. A couple of comments: - The drivers protection diodes are most probably there (they are an inevitable byproduct of the transistor construction), though they probably die after you yank them to -40V. The problem is that they can only conduct so much current (it should be specified in the datasheet). The current is given by Ic = C * dv/dt (capacitor current). If all the other drivers try to force a large dv/dt the current will be just to large for a single driver to handle even if the output transistor is still ON and the protection diode is there in parallel to give a hand. - If all segments are lighted up except one, you might still have problems on just that one driver, no? If I were you I would put limiting current resistors in all drivers outputs (yep, it's a pain in the ass). With that done you might not even need anymore to shift the control signal with respect to the common signal.

[@jeffro.]

justpaulo- ohmygosh you're so smart, you know so much (repeating things others have posted), BUT do you know the difference between "to," "too," and "two?"????!

[@zaidhussain5206]

Your channel is a real treasure on KZbin, please keep the work , wish you good luck , your video is very informative to me.

[@grahamking9121]

These specifics are above my level of experience and prior understanding, though I studied & worked for years in the electronics industry. But it is explained so clearly here - design, connection methods, plus failures and all - that I really feel educated upward a level -Thanks! And the electroluminescent glass display is a super-cool look!

[@BrianKCatlin]

Did you contact the chip manufacturer to find out why the internal diodes weren't doing their job?

[@vejymonsta3006]

I'm sure it's working exactly as intended.

[@magneticflux-]

I wonder how it'll be resolved - it's not like the manufacturers can release an update lol

[@garrett2449]

@@magneticflux- Errata, haha.

[@T3sl4]

@@garrett2449 Not like Microchip has ever written errata for any of their products ever. Oh wait...

[@denny9931]

​@@garrett2449 lol @ Errata :-) Clamping Voltage for HV507 is -30V or Vpp (60-300V) +1.5V @ +/-1mA according to the data sheet, so a -50V ringing will kill it. I mean it is a self printed, one-off display, it is not as if you would calculate or expect these effects beforehand, the capacitance per segment is quite low, too low to make anyone care about single channel protection. Phase shifting the outputs is a good solution to this kind of voltage doubling effect, nice that it could be solved in software. It came out very nice and i learned a lot from the video.

[@shimmerite_ua]

Its 3:30 in Kiev, but it doesnt matter, THE GREAT ONE HAS RETURNED

[@NNNILabs]

I really love how you show us your mistakes so that we can learn too, instead of just the final product.

[@pontosinterligados]

Oh boy, I was waiting for this since you've published how to make a custom liquid crystal display! Thanks for sharing!

[@shraiwi]

Can you try to make a transparent EL display? I love your videos! Keep up the great work!

[@davidk8893]

The problem that one would have to overcome with this idea is that the electroluminescent paint is opaque. I don't know if you'd ever get it truly transparent because of this limitation.

[@zlozlo3935]

@@davidk8893 Transparent EL displays are made by Beneq / Lumineq (ex Planar). This technology is far more advanced and requires complicated equipment for epitaxial process.

[@oatlord]

I'm not qualified to view your content. It's so cool though.

[@donaldklopper]

My thoughts exactly! Yet, here we are...

[@didrikskantze3695]

Just like to express how impressive this is, and then..in the next video, equally impressive on a different subject. And thank you for sharing all your findings in a very clear and great way. 👍👍👍

[@TheWireEDM]

I was amazed just at the sheer enginerding needed for the glass panel and then the electronics issue. Having chased my tail for 2 months with the wire EDM controller board and various noise issues has taught me a few things and the puzzle of 'why did it work before but not now' is tickling all the right places for me to continue :)

[@MrRolnicek]

Man, the more I see of your impressive work the more I'm convinced you could build a carbon (or carbohydrate) fuel cell which is a technology in its infancy but I'd REALLY like to see it.

[@eumoria]

KZbinr curiousmarc has an ongoing series resurrecting the Apollo guidance computer but it's pretty popular so I'm sure you already know about it. I don't know if he has or had access to the display module, though, don't see it in the relevant videos. Love the work!

[@DanielPierce]

I was a bit worried you were done with KZbin and then you came back with this monster of a great video!! Thank you sir!

[@Doping1234]

Wow, congrats on getting this to work. That's seriously impressive!

[@grendelum]

So I can finally have the 1980s style bar graph/percent bar display for my EVs power consumption (volts, amps, battery % etc) and regen that I’ve always wanted? 🤤🤤🤤

[@rkan2]

Ohh yessss!!

[@Asdayasman]

Oh man and a Honda S2000-style dash, but for amperage instead of revs? My boner cannot be contained.

[@esra_erimez]

Would you do a video about creating graphene via chemical vapour deposition?

[@kenneth6731]

Extremely impressive work. PLEASE don't stop!

[@garrett2449]

Every step of this project seems like it was an emotional rollercoaster. Great show as always, I'm sorry it fought you the entire journey!

[@Rouverius]

Amazing work! And still days away from the Apollo 10 launch! Those silver dots on the display got me wondering. I was guessing that the actual DSKY had independent common electrodes for each display register; hence the many visible electrodes. Thankfully, some of the original schematics are now publicly archived. Have you seen these? This is full of great info on the AGC in the LM Module. archive.org/details/acelectroniclmma00acel_0 Looking briefly at the original AGC display schematics (Figure 4-229) from the LM, they seem to have completely isolated the signal circuits by using a matrix of specialized miniature relays! This is cleverly done by the using double coiled relays and a few diodes to creating a basic AND gate to drive each segment. I'm sure there's a lot more goodness here that I miss too.

[@Ender.wigginn]

These are really cool! Is your education in applied physics?

[@AppliedScience]

I have a mechanical engineering degree, but have spent most of my career doing more electronics, sensors, and electromechanical systems. I somewhat enjoyed my time at university, but didn't think that it prepared me well to be a useful engineer.

[@noreason2701]

@@AppliedScience your 15-30 minute videos teach me more than months of school ever could have.

[@BrightBlueJim]

Engineering is just applied physics...

[@L0j1k]

@@BrightBlueJim Physics is just applied mathematics.

[@intrametaarchi1015]

@@L0j1k maths is just applied logic, and logic is applied thinking.

[@cpayne1123]

It's so awesome to see such an intelligent person sharing their thought processes!!

[@AtomkeySinclair]

Amazing content - especially the availability you have given to open source. Well done sir.

[@michaellitscher9456]

How about applying the z-tape to the circuit board, instead of the glass? Then when you pulled off the tape, you'd be pulling on a robust copper-clad board, instead of a coated piece of glass.

[@JonathanRockway]

I assume it's equally sticky on both sides of the tape?

[@satibel]

It's double sided, but you could use one that's only one sided and just holds firm against the glass.

[@didotb01]

*talking about bugs* ".. pretty enjoyable.. in theory"

[@projectartichoke]

My hat's off to you, that is an amazing accomplishment well beyond the scope of any electronics experimenter I know.

[@ernestuz]

Your videos are amazing. Well done sir (an engineer here able to appreciate the difficulty of what you do)

[@h7opolo]

this video's title has a typo; change "a" to "an".

[@BothHands1]

Absolutely fascinating video. I saw your other video from last year just a few days ago, and was already very interested. This is amazing, i can't believe you did this all on your own without a giant manufacturing plant. I always have to stop the videos when you get to the coding parts, b/c that's literally a different language to me and i don't understand it at all. But the chemistry, physics, and electrical engineering aspects are so amazing. I love this channel

[@scottcortus9590]

Good work! Congrats on overcoming such a complex issue... They turned out looking awesome!

[@hadireg]

Yeaah, what a great victory feeling when you go through all these issues and looking at those panels is just not seeing them! Congraats and Many Thanks for sharing all this!!

[@Dragonmastur24]

This is absolutely AMAZING!! Keep doing what you do, people like you keep the world goin' round..!

[@dylanh333]

I don't always get through long videos, but for this one... I was GLUED TO MY SCREEN 😉

[@KJ7JHN]

Amazing work. Keep up the jaw dropping performances. Thank you for the documentation too.

[@R4wF4ce]

Heck this is cool. Thanks for going through all the effort and troubleshooting to bring us such an incredible thing

[@pdrg]

What an amazing project. Thank you for taking the time to explain it all so well.

[@FindLiberty]

You don't give up easily. OUTSTANDING

[@8-bitbitsa821]

Wow, I am in awe ! Great job Ben ! Excellent work ! 👍🏻

[@alancordwell9759]

Absolutely outstanding work Ben, very interesting to see the whole process; not just of design and construction but the debugging too. :)

[@gunnaralv]

Was wondering a couple of days ago where you was. Good to see you back! As always very good videos full of interesting stuff presented in a very clear and calm way. You are doing really breakthrough stuff in your lab :)

[@billbrown9073]

Great video! I appreciate the work you went through while debugging the high-voltage issue and your explanation of the problem w/your solution...I learned something! Kudos!!

[@glennbartusch7310]

The quality of workmanship exceeds even that which would be expected of a well-managed production floor. Impressive!

[@SM--]

I have to admit, this is the only youtube channel that never disappoints.