Wild Projection Meters & Micro Cameras!

[@AppliedCryogenics]

Looking at those awesome lamps at the beginning, it might not be a coincidence that Chicago was an epicenter of pinball machine manufacturing.

[@ociemitchell]

There is something so satisfying about the damping on these old meters. Quick response with no overshoot.

[@8BitNaptime]

Less satisfying are the inverted scales...

[@Failure_Is_An_Option]

So moist....

[@ermyvids]

This is the same technique that was used in the early development of transistors in Japan. They projected the values across the room on the wall so they could control the temperature of the they were using to draw out the semi conductor.

[@timacrow]

I think we're all glad they can make colonoscopy cameras so small. I mean, look at the size of video cameras in the 1950s!

[@caw25sha]

16:29 It's got Link printed on the side. Possibly from a Link trainer, an early flying trainer. It might have been made in 1979 but the design and technology seems a lot older to me.

[@cullenchase9161]

The tech probably is a lot older, but a lot of military stuff is kind of if it works don't change it. The last place I did some electronics assembly for was a very small aerospace firm and all of the engineers were amazed by 3d prints coming from an ender 3 and had never heard of printing with tpu, it was a wild experience.

[@Jon6429]

I used to work on some old SiPP/DIXI jig borers that used a television camera to read a glass scale etched in microns. Every week cutting oil would find a way inside and they required cleaning. This was way back in 1987 when I was a young tech and the machine was a decade older than me!

[@CARLiCON]

the Osram Sylvania plant in Hillsborough NH USA is still going, making automotive bulbs

[@Electrowave]

Amazed at the size of that tiny camera!

[@robertdolby]

Excellent video, as usual! These displays/meters are so fascinating. Thanks, Fran!

[@cheeseparis1]

Great video! One micro camers definitely needs to go into the Lumitime motor assembly, to be able to check the little lever acts and forces the rotation direction.

[@geneard639]

Ah, 327s... and 328s, were the bane of my existence when I was in the Navy slinging wrenches at SH-60B Seahawks. The Audio Control Panel alone used over 100 of those and if the bird had a lightening strike or a transient voltage spike? I would be changing out 110-118 of those in one go. Never fun.

[@volvo09]

Wow, those cameras are incredibly small! And that projection gauge is really cool. A good one for your collection of neat vintage displays

[@qlue7881]

Clever Using film as a light weight, low inertia movement Then projecting that onto a ground glass screen with the indicator line on the ground side of the glass screen Thus eliminating parallax error and allowing the movement to be sensitive to miniscule currents Thus no electronics needed to boost the current to drive a heavier needle Everything in this design screams high precision I love it 😍

[@K-Riz314]

Your reaction to that duplicate package was priceless and gave me the best laugh I had all day.

[@RRosenberger]

I sent the first package to the PO Box by FedEx. I wasn’t sure if it got delivered so I emailed Fran and she said she had not gotten it so I sent another through usps.

[@mikebarushok5361]

On that meter assembly, when applying voltage through variable resistance it usually makes more sense to measure the current. The typical bare panel mount meter that viewers would be familiar with are actually deflecting the needle in proportion to the current and if being used to measure voltage usually simply have a series resistor to pass current in proportion to the applied voltage.

[@FranLab]

I would need a microammeter...

[@rockapedra1130]

Thanks Matt! That was cool!!

[@xlerb2286]

Interesting meter and a fun to watch tear down / explanation. I think my parent's had a light meter for their camera made by Weston. I remember that name.

[@Grateful.For.Everything]

Those meters were very cool to see!!!

[@revgregory]

I suspect there were better ways to display the information those meters were used for when they were created, I also suspect there was a dusty military technical data package that hadn't been updated in a decade or more that required that specific design to be used regardless of the current state of the art.

[@macgvrs]

Very interesting. The name Weston is familiar to those who know about test equipment used on radios from around the late 20's to early 30's. Wonder if this is the same company?

[@tekvax01]

Sounds like all hell is breaking loose outside Fran!

[@gumulf]

Amazing technologies, both the cameras and the meter display. Thank you for showing us!

[@NiddNetworks]

❤❤❤ Hi Fran!! Nice late night chill video for me here in the UK!

[@paullawrence5900]

How much gold is in that.. 1 device. Really cool to see such an example of old tech.

[@LightBranches]

That is one wild meter!

[@brad9529]

Those cameras are very cool. The whole video was, thanks to the person that sent the cameras. Few have ever seen cameras that tiny so up close.

[@wdavem]

I'm a lot less worried about colonoscopy now! Good timing. The double package is most pleasantly weird.

[@posysajrazdwatrzy]

I love the community that grew around this channel, like-minded people going out of their way to share amazing/obscure/cool tech stuff with Fran and we all get to benefit from/enjoy their passion/contributions, simply amazing

[@stevenverhaegen8729]

Beautiful boxes those lamps! 😮

[@earthlingjohn]

7:28 '' Let's Do The Time Warp Again ! '' or , given that the sender's name is Rick... *_We've been Rick Rolled_* !!

[@Chris_the_Muso]

He sent one package from an alternate universe.

[@ThejasonJaw5442]

Ture design quality workmanship

[@bradmad8346]

My guess is this was part of an avionic inertial guidance calibration, while on the ground. The 50uA meter was a standard in test instruments, just magnified to allow fine measurements just a guess.

[@bradmad8346]

It is known as "inertial navigation system" but I think you get the idea.

[@William_Hada]

Great explanation! Glad to see you are back. You look like you are doing very well!

[@analogalchemy]

So when I went to replace all my Soundcraft 2400 VU meters bulbs, I did it from the back by taking out the 8 channel assembly, well it turns out you can do the same thing and just pop the cover off to desolder the bulbs and replace, lol. Fun discovery for nerds.

[@GershTalentAbeny]

I can't see myself very educated I went to grad school... before they banned the standardized testing.. play from an early age 2nd grade I was in 1/10 in most Sciences even English and vocabulary I was actually in the 1% of the whole country this is back in the 80s .. and I understand like a lot of technology and even cutting and Technology but I have no idea what you guys talking about? I do not understand anything that you guys are saying

[@beeamendola]

Hi Fran!!! Fun today !! Yay!! !Enjoy!!!!1

[@tekvax01]

That adjustment for the bulb rotation would null out the parallax in the optical system. Would it not?

[@Ni5ei]

4:46 I don't know why but I was kinda expecting the finger to be in the package as well 😂

[@btruj2507]

"Am I having a brain aneurysm?" 😂😂😂😂

[@gcewing]

Is the bulb adjustment screw really rotating the bulb, or is it moving it in and out?

[@FranLab]

Rotating. You rotate the filament to align it perpendicular to the film for the smallest single point light source.

[@Allan_aka_RocKITEman]

Starting in about 09:30 in this video... That thing is _so small_ it should be called a _Subjective Lens Assy._ 😉

[@highpath4776]

MLBs - ideal for Radio Dial light ups

[@topytopy]

Oh my god. I looked at how much those micro cameras cost as It'd be really helpful for some of my projects and they are worth a fortune. If you can get a couple of them repaired and working that would be amazing.

[@TheGreatAtario]

Does the bulb adjustment not move the bulb along its axis?

[@FranLab]

nope. Just rotates the filament.

[@ludmilascoles1195]

Used in a simulator calibrator me thinks. Basically a reflection galvanmeter. I think you took one those before.

[@mal2ksc]

I was watching the segment about the tiny cameras when I got a call from a relative telling me that tomorrow they're going to use one of these on her. I mentioned that I was watching a video about how TINY and COOL they are and she was like "Oh, I thought they were the size of a pencil _eraser,_ not a pencil _lead._ This doesn't sound so bad after all." So you've done a public service. 👍

[@charlessammons9987]

I hope everyone is hitting the like 👍. It's really nothing to us, but it drastically effects the algorithm.

[@earthlingjohn]

As do comments and replies and the likes therein :)

[@trolojolo6178]

I don't like this content. So I disliked it to help the algorithm not showing me this kind of boring granny stuff anymore.

[@subsubl]

Also, share and click copy link, which does wonders to the algorithm. Even if you leave it the pastebin. Technique called shadowshare.

[@motodude23]

The burnt colonoscopy camera unlocks a new fear I didn't know was possible, wtf

[@RRosenberger]

Burnt? Did I miss something?

[@motodude23]

@@RRosenberger one of them was pretty scorched and corroded, likely from disassbley but still

[@RRosenberger]

@@motodude23. One of them has the metal case missing and what you see is black epoxy, white epoxy, and white RTV. It’s dirty and maybe corroded. They are very old and have been in a pile of junk. They weren’t burnt. Some CCD’s overheat when they fail but they don’t get so hot that they look burnt.

[@RRosenberger]

There is also a dry lubricant that is a black powder that is used inside the scope. The CCD is probably coated in that too. It gets all over everything.

[@davepost7675]

"Way down inside" never gets old...lol

[@JacGoudsmit]

Sounds like the Lampolice is onto you!

[@lllllREDACTEDlllll]

Bullet Cam?

[@MrRlnansel]

I reckon those galvanometers represent the end of more than a century of design philosophy where measurement and display were still intimately connected. Digital panel meters still sort of do the same thing, I suppose, but I expect most later systems tend to separate data capture from display to lower cost and increase versatility.

[@Allan_aka_RocKITEman]

Those little cameras... DON'T SNEEZE! 😉

[@GershTalentAbeny]

Fran, I love your video and I love the content and I love you enthusiasm and your knowledge absolutely brilliant! and I don't mean this in a bad )Way) :) I meant all this stuff since I was very young I could have done anything with my life I can take Bose radios apart and put them back together I thank you very sexy for what you do! I don't know maybe I don't see many women that are is brilliant As You Are .❤️❤️❤️

[@8BitNaptime]

An 0805 color camera!

[@steubens7]

please enable automatic subtitles

[@FranLab]

I do on shorts. More here - kzbin.info/www/bejne/fZ-kfZxoZdWNjLc

[@earthlingjohn]

30:25 🤣🤣👍

[@itsmatka8384]

Love yer videos and historical knowledge.

[@CARLiCON]

I see fun future videos with Fran hacking those tiny endoscopy cams..

[@GordieGii]

Amazing tear-down of the military galvano-meter. Keep up the great work.

[@michaelnitschke9872]

It may have been mounted above your head

[@midbc1midbc199]

Use lenses from a dvd burner to repair the cracked lenses

[@The-KP]

"Mint In Box" is collector terminology.

[@cullenchase9161]

I have done some electronics assembly for military stuff and a lot of the parts are still insanely overbuilt like this using gold plated contacts, heavy duty fasteners, and incredibly wasteful cnc cut aluminum parts. It was cool getting to work with parts that were overbuilt instead of underbuilt like a lot of consumer electronics though.

[@robertjonasar2053]

bit like a mirror galvanometer.

[@FranLab]

Yes - Check the link in the description...

[@walsakaluk1584]

Thanks Fran. That was a romp down memory lane.

[@HelloKittyFanMan.]

So since we're looking upside-down that means we're looking upside-down?

[@tekvax01]

Is not that meter called a galvanometer?

[@jaymiepobanz8801]

Very interesting and enjoyable.

[@bobdoritique7347]

Merci, interesting.

[@lavina58]

Awesome 😊👍🍀💞

[@Malphazar]

Butt Cameras lol

[@stan.rarick8556]

MIL SPEC

[@UpLateGeek]

I love how everything in this viewer mail episode was kind-of related. The lamps were also used in projection meters, and the cameras were microscopic like the lamps and the scale used in the projection meters. That's a cool coincidence! (Or was it?)

[@mikebarushok5361]

Watching again for the Al Gore Rhythm. Must have been something needing to be edited out of the first version.

[@FranLab]

Edited in... correction on the voltage reading.

[@brooklyndrive]

Northrop, 1980, ?B2 bomber

[@backwoodsmodified]

Bakelite?

[@filepz629]

❤️‍🔥

[@lukasgayer5393]

That part about human butt and "not gonna handle" is ridiculous and unnecessary. These are the INSIDES of a colonoscope. These never get in touch with ANYTHING. It´s like refusing to eat ham because it is made from a part of pig that also contains an anus. Just... just be reasonable.

[@Broken_robot1986]

Nah

[@dcolb121]

Interesting. How it focused is quite novel. It's amazing how tiny a camera can be now. I wonder if it's the low end size limit?