Videos like this take weeks and dozens of hours to prepare for. Sometimes I wonder why I do them, but comments like this that keep me going. Thanks!

@shingabiss

3 жыл бұрын

Just miserable trolls Jeri.

@brianmay8114

2 жыл бұрын

First of your videos I've seen, but it wont be the last, wish my teachers in collage we as good as you.

@ingo6367

Жыл бұрын

@@brianmay8114 That's it !

If civilization ever collapses, Jeri can recreate it all from dirt and sunshine lol.

@bingbongabinga2954

5 жыл бұрын

Dirt and sunshine are meta.

@alonecoder600

4 жыл бұрын

There is a problem with amplifying the output signal. You need vacuum tubes.

@BoHolbo

3 жыл бұрын

@@alonecoder600 Sure, you *can* use vacuum tubes for that, but there are many other ways of doing that. With little to no noise added at all!

I keep coming back to some of your "older" videos, Jeri. And every single time there's something else I'm taking away. Thank you. This stuff may be old but it keeps fascinating me. We take our transistors and MOSfets for granted but those guys did amazing stuff without them anyway. Keep it up!

@jeriellsworth

Жыл бұрын

I'm so glad. Sometimes I posted videos that took me weeks or months and nobody cared about the content at the time, but as the years go by folks find them, which makes it all worthwhile.

@insertaverygenericnamehere

Жыл бұрын

@@jeriellsworth Indeed. I do like the old videos - and I love to be able to still watch them.

@phil2768

11 ай бұрын

@@jeriellsworth People do care, it's just that many don't acknowledge that they do - your content is awesome and I only discovered it because of your more recent interviews and the work on AR you have been doing.

I'm a 53 year old auto tech/mechanic. I love your scopes. I have a 4 channel in my scanner however very limited on what you have. Great explanation. I was able to understand everything. Ide love for you to come to my shop and give electronics classes to my younger techs.

What a monster O-Scope. Wow.

@christofferhoward6568

Жыл бұрын

Destin 10 years ago🥹

Amazing! I'm an electronics engineer and I know all of the theory but this was a revelation. Engineering is taking the theory and making use of it in innovative ways and this is certainly innovative. Your explanation was *very* clear. Nice to see someone who really knows what they are talking about.

@davidstainforth-small2207

6 жыл бұрын

Andrew Le Couteur Bisson Q

I gave all my memory core to my son's elementary school. Knowing how old tech works helps you know how to design new tech. Excellent presentation!

You kept telling us it was complicated... but you explained it really well. I never really "got" hysteresis curves until watching this video... Keep up the great work.

An interesting "history" lesson. For any viewers that are thinking/commenting that this might be some new fangled, better way to create computer memory, this is 1950s technology. The reasons for putting this on the top shelf was speed, bulk, and heat. oz for oz a transformer coil will generate far more heat than a semiconductor. The physics of changing magnetic fields imposes a limit to the speed that a coil can "latch" on to a state. The reduction in size of this system produced "Bubble Memory" which is another form of magnetic memory but still not as efficient or quick as turning off and on the flow of electrons through a semiconductor. Great video!

@evannaallen8881

5 жыл бұрын

Efficient for WHAT .... ?? That's the question you need to ask.

Great explanation! Very interesting. I got most of it on the first pass and will get the rest on the second.

I worked with this technology many years ago, nice to have a refresher. Thank you Jeri, well demonstrated.

Jeri, you are a nature force indeed. You don't have to make elaborate videos as they are very elaborate, but I greatly appreciate them for their historical value. There is a lot of power in simple things with simple principles, that most people don't realize.

I really wish there were more Jeri Ellsworths in the tech world... Im sure there are, but I just haven't met too many of them. Keep it up Jeri! Love your work, you're a genius :-)

Nicely done, blows my mind to think magnetic cores being wound and assembled to make memory modules. Very elegant use of flux in cores. Enjoyed the video thanks you.

You are bringing back memories when I was at Arizona Institute of Electronics Tech school in Phoenix when the teacher brought in a duplicate core memory stack. All of us had no idea what it was until he went over it's use and technical details. That was in the early 70s and some of the hardest parts of the training for us was with tube theory. This is a real good review to watch and it's amazing how much has been forgotten. Thanks for the review! :)

Amazing video i have been tinkering on and off over the last couple of years and last month repaired a shelled ferrite core with super thin wire. This video helped me understand magnetic power working with wires better than previously. Thanks

Thank you for this Video! My Cousin who has had a military Career in electronics,has tried to explain to me at several different times, how the old core memory worked, But to No avail. Of course he was just describing its Function Verbally. No Visuals. But the way you explained it here, With your Very Informative Video, I think I finally get it Now! Thanks So Much :)

Bless her! Bless her!! I'm in love with her and her equipment! X

Just watched a video class from the Army, I think from the 60s on magnetic core memory as well. I find it a fascinating bit of history. Having started with TTL logic gates, Eproms etc, I can truly appreciate this stuff. Thanks for your demo. I was able to follow with no difficulties, well done.

I read the article on the SRI website about three years ago, and have been curious about how it worked ever since. Thanks for the explanation, I never would have found out otherwise!

P.S. These was also another winding on the cores called a "kill winding" for reset like in a flip flop. The tool used to remove them from the board was called a "crab grabber". It was hard to unsolder all those wires at the same time with hot stones from the campfire in the cave. That particular machine used vacuum tube drivers, which meant I got to work in air conditioning. Yes, we had that then! ;>}

How haven't I found your channel earlier? Very interesting stuff!

Thanks, Jeri. I had a look at an Elliott 803 at The National Museum of Computing a few months ago and had an interesting discussion there about magnetic logic. Like you, I couldn't find much information online. Your video made it much clearer. The Elliott machine used germanium transistor gain stages between gates to maintain the amplitude. It also had (relatively) beefy clock buffers for each set of gates so the cores could be "set" each cycle. What is more impressive is that this machine still works!

Super awesome! Loved this! This tech is really retro but you brought it over in such a totally good to follow "proof in lab" style! Thank you for this video! (And all the others!)

Oh yes! Those tiny, tiny little toroids were hand-sewn by humans. My father has quite a few of these in his collection. The magnet wire is so fine, I just can't imagine how these people sewed them! A 1Kbit memory is as big as a box of strike-anywhere matches. It is genius to use magnetic hysteresis as a means of storing information. Our forefathers were extremely gifted to do this with nuts and bolts technology.

Your a great educator! I searched on and off for most of my teenage years for a proper explanation and never once until today did I find the answer. Even most computer and electrical engineers I talked to had no idea how this shit worked. It's genuinely great. 6 years at least. And this was made 7 years ago. I just wanted to know how the space rockets worked. And today I searched again because I figured that it would be very helpful in creating neuron networks for my robot's limbs. And it's perfect! I can't really use too many soldered connections and even wire is at risk breaking. This however just needs ceramic rust rings and a coil which I plan on using conductive coated fibers or specialized plastics for. All kinds of excited for the options and possibilities this gives!

This is a vague and written by a dyslexic. Thank you for your videos. I used to go down into the dump with my Dad and pull old electronics and mechanical devices from the piles. Some of my favorite memories come from those trips. I am so inspired and glad to hear you talk and to know that you are doing so well, Oi

I learn so much more from your videos than what I did out of 2 years of electromagnetic technology. Thank you for your help.

Nice video, also like your scopes. We "the US Military" used iron core memories in some of our gun control computers back in the 70's. the memory container was shaped like a hat. I was trained on them & more at 29 Palms in a class called "FDLC" Fundamentals of digital Logical Computers. Thanks for bringing back some nice memories! & a bit more knowledge.

@markmaker2488

2 жыл бұрын

You might have watched this kzread.info/dash/bejne/eoSImbmtoJbfn9I.html

You did a great job explaining the basics. It was much easier the swallow the second time around. (40 years ago was the first). I remember seeing the DEC10 in action. Nothing like the feeling when you drop a sorted box of punch cards :(

Really enjoyed watching you describe some of the tech I used to work on. You did a great job explaining how it works and even though the topic wasn't easy, you nailed it!

I happen to do my research study for LED lights of any type that work with switch mode constant current supply. Now you got me interested with you because I clearly understand reading Closed Captions while you explaining of the Magnetic-Logic works. I also few years ago saw you doing videos and didn't subscribed it earlier? I'm deaf since after birth and not only deaf but also hear both devices Cochlear implanted (CI). I do know my CI have coil to coil how amazing my sound changed my life. I still learning new ways of electronics in my small shop. You have great experienced and all the equipments of oscilloscopes I admired of your performance and education. I will continue watching your KZread video with CC. Thank you and keep it simple as you keep it going.

Really great explanation and demonstration, thank you!

A very good video of a complex subject.

Wow, I just love vintage technology. I've got several old radios and computers. Nice to see others with an appreciation of our technological beginnings.

Dude...this is preserving and reviving this ancient technology. You are preserving technology for generations! That's amazing!

Analog computing simply rocks. Thanks so much for making this.

@josephmarlin9827

8 жыл бұрын

+Tim Miltz This is digital

You're assuming that our desks will still be located inside the building?

Exellent explanation, thanks! Did a high school report on these once. Dad helped me find scrap magnetic bead boards. Got an A and learned about this older technology. It was thousands of little magnetic beads, so much manual labor.. Thanks

Thank you. Crystal clear and easy to follow, even with minimal electronics background. Very interesting!

Hehe love these vids. Here's me with a little arduino and some sparkly lights, whilst Jeri reconstructs the work of geniuses :) Ah well gotta start somewhere

@mosestewelde8163

7 жыл бұрын

How is the going so far? Have you advanced to something else? lol I used to think I was pretty advanced with my arduino until I found EEVBlog.

this is awesome to learn about, thank you for sharing.

Good job. Enjoyed the trip down memory lane. My first co-op job was at Lincoln Labs where I had to measure hysterises on manufactured cores used on the Polaris Subs. Actually got an A on my EE lab paper because I had access to a system that would measure and print the H-loop out. Later on when I worked as a test engineer we were very proud of our 16K core memmory in a computer used to calculate projectile trajectories. Later it was upgraded to a 32K core memory. Limitation of course was the space required since the cores could only get so small to be useful. We had a hell of a time keeping the systems working. Field reliability was compensated by the fact that the computer did away with hours of calculations done with slide rules by a an artillery fire unit. The computer had to be housed in a half empty ton truck. Eventually all this got replaced with laptop that could do the calculations for the whole artillery battalion

Very nice video - thank you. I began work in Jan 1979 with NASA at MSFC in Huntsville, AL moving to WSMR in New Mexico in 1976 and spending another 20 years there working on Univac mainframes. We were taught these theories and I still remember core memories. The 1108 CPU has about 1600 PC boards in it and there were four huge logic books - once caught up in a logic problem and lost in the books, I called it "electron smashing". Wish I could do it all over again.

Interesting stuff! Always great to get an insight into technologies which are now considered "dead" but were vital components of the path leading from the dawn of technology to where we are now. CDC was a groundbreaking company that produced some of the fastest computers in its day. It was also a key player in the early development of supervisory control and data acquisition (SCADA) systems for electric utilities. I work for a major utility and a lot of our stations still use CDC's communication protocol, though of course the CYBER mainframes disappeared years ago. One documentary about the NASA Apollo missions (a Science Channel series called "Moon Machines") tells the story of how ferrite "ROM" was created for the onboard computer. 1s and 0s were woven into the ferrite core network by Little Old Ladies, leading to the term "LOL memory."

@strongholds12

4 жыл бұрын

DesertTripper NASA National Academy of Scam Artists

I feel lie a groupie - but I am a huge admirer of your work. Neil Styner did a lot of work on magamps wich relates directly to this. I think flat planar transformers are a way forward for printed electronics particularly for 'on paper' amplifiers - not sure about printed logic this way but why not.

@carolynmmitchell2240

6 жыл бұрын

Robert Murray-Smith omg I'm a groupie of your work

@JohnWilkinsonTesla

6 жыл бұрын

I think had we gone another way we would be printing computers in the way you describe.

Jeri, I congratulate you, it's the first time in years that someone has explained to me how magnetic ring memories work. Excellent explanation. I'm going to watch the video several times because it's a very difficult subject for me. That's how the space shuttle's memories worked. Thank you so much.

I do a lot of experimenting with instructors. You have the ability to transfer info with great clarity. Will watch and listen. thanks.

I'm in love with you and your equipment! Xxxxxxxxxxxx

Types "Transformers" into google... Gets links and pictures of fictional robots -.- .... Thanks internet!

@AfaqSaleemChannel

8 жыл бұрын

+Amineo LOL

@rich1051414

8 жыл бұрын

+Amineo I had a shop teacher that called cheap chinese transformers with fake name brands on them, decepticons. The way he said it 'matter of fact'ly in a way that people wouldn't question that were not paying attention was hilarious.

@EvenTheDogAgrees

8 жыл бұрын

+Richard Smith Hahah, I'll start using that one too from now on. :)

@NeoHoshi

8 жыл бұрын

***** Yeah... I got through about 20 comics before I realised I wasn't learning electronics xD (Joking).

@baxtercohen

8 жыл бұрын

+Amineo Please note: you should not search for "transformerS" but transformeR. The plural makes the whole difference. You will still get a lot of crap, but you'll see some real transformers.

Thank you so much for taking the time to explain this and document the lost art of computer engineering. I tried to explain "core" memory to some kids that just graduated from CS from Ga Tech and they looked at me like I was crazy! Now I can show them this and let you blow their minds!

I came across this while trying to work out how to correctly set up DIY VR, I'm not disappointed at all, this is awesome.

And I still remember how absolutely awesome it was when we got a 16 K byte ram card for our Data General!

It's called "Toroid Memory" Seeburg jukeboxes introduced this technology in the late 50's to replace the old pin banks. What's also cool is that it is non-volatile. When power is removed from the equipment in which it is installed the toroid remain in their last set state. Don't think they are immune to an EMP.

@Deneteus

8 жыл бұрын

+Bruco Alidas Investigate Graphite shields. Be surprised what you can do for cheap.

I loved the magnetic logic demonstration. Thanks!

Awesome job Jeri! You definitely explained a complex issue very well.

A current flowing produces the magnetic field. Not a pulse or a voltage level. If the current is modulated, and the level of the current is greater than the hysteresis of the material properties then coupling will occurs. Core memory is fantastic. Writing is easy, Reading is destructive and has to be written back. Thus the Read-Modified-Write instruction of early computers. Good overall ideas however some math would be nice.

Magnetic logic was used for the control system of the Sizewell B nuclear power plant in the UK, which was commissioned in 1995. The health and safety executive (which was responsible for nuclear safety) required that the reactor have dual redundant control systems, operating in different modes, so as to prevent a simultaneous failure of both systems. Magnetic core logic was used, with an automatic switch over to a PLC in the event that the self-diagnostic circuits in the magnetic logic detected an internal fault.

@233kosta

6 жыл бұрын

ChumpusRex I bet that wasn't cheap!

A very intelligent lady who can also speak on the level and keep things easy to understand! THANK YOU! :)

fantastic !! kudos to you for tackling now obscure technology that may become important again in the future

Well done Jeri.

Ahh, memories from high school. Zanovat La'toh - Yes, humans had to thread/weave those little microdonuts by hand into lattices of wires in those grids. We watched a couple movies of the process back in high school. Those were being built by hundreds of Japanese young girls, who had the good up-close vision AND the fine-motor skills to do the job. Unfortunately, we learned much later that most of those young ladies acquired severe vision problems later in life. The movies of those things being built are still out there. Also, it was a few of those core grids like the one Jeri held up at the start that served as the programmable memory that landed with the LEM on the first Apollo moon landing. Because transistors were still too fragile or susceptible to shock and vibration, these heavy duty core things were the only thing currently extant at the time able to withstand all the shocks and shaking of the rocket trip to the moon. And, as I recall, that moon landing was accomplished with only 64K of memory, 'cause the stuff was so big, they couldn't fit much more aboard. So, you can imagine it took some pretty compact coding to make it all work!

@tyroneousassault7091

7 жыл бұрын

W.J.R. Halyn 😂 WTF!? 😂 Are you playing with your curvature? I heard they used a Commodore 64 with a flux capacitor wearing bras on their heads at a skull and bones sleepover. Please stand between two rodin coils, put down the bottle, get a bowl of MR.T cereal, and stop glOBEYing!

@californiakayaker

7 жыл бұрын

I believe your probably 100% correct. Not sure what ty's problem is.

Thanks Jeri! Very clear and easy to follow given the complexity of the subject.

This is my first video of yours. You nailed it. I could never get an answer on how a magnetic logic circuit worked. It make lots of sense now. Thank You.

I didn't find that complicated at all. Made perfect sense...

@j.lo.5784

10 жыл бұрын

In general the word "complicated" should not be used in any explanation. Those who agree that something is complicated will find it harder to understand the topic.

@nlamorte90

10 жыл бұрын

Jürgen Lochner is that because they are less capable of understanding the complicated subject matter either because of a lack of knowledge or want, or because of the psychological priming of the word 'complicated'?

@funkyironman69

10 жыл бұрын

Jürgen Lochner What about complex numbers? :D

@dePonce

6 жыл бұрын

i agree the word "complicated" should never be used while teaching or in a explanation ... there are very few exceptions ... i thought i was the only one who reacted to that in this video ...

My ferrite is ready.

I wish every teacher has your ability to explain things. You have a superb understanding of technical stuff.

So I just came across your channel today, and this was the second of your videos I watched. Fascinating topic Jeri! I had no idea you could make logic gates in such a way. It certainly makes sense how large some of these machines must have been, given the amount of these gates you would need for the application. It must have been so complicated to develop large sets of these gates x.x

The Germans invented this before the great depression. saturable reactors yeah It's not really complicated just old school technology, pre antedeluvian IMO tyvm for sharing, brings back the old memories, no pun intended Just try to wrap your mind around magnetic amplifiers, no electronics, they are all magnetic core, wires, and a power supply. I had fun researching magnetic amplifiers.

I love this woman. So intelligent AND beautiful!!

@garrysekelli6776

7 жыл бұрын

Can she remake this with nudist version please?

@obsoleteprofessor2034

6 жыл бұрын

Behave.....!

@holetoanotheruniverse4690

6 жыл бұрын

James Rothwell Love your Lada Niva :)

@carolynmmitchell2240

6 жыл бұрын

Juan Pablo I think only a virgin would ask that question, nobody changes when losing virginity.

@NuntiusLegis

5 жыл бұрын

Stabby666, you mean once you lost vriginity, appreciation of beauty goes away?

That was great. Lots of flashing back to 1st year Microsystems classes at DIT 1992.

Still learning from you. Thank you so much Jeri.

how does she not have a billion subscribers already?

@meercreate

8 жыл бұрын

+Sidharth Talia Because most people are gamers. We are a dying breed.

@JohnWilkinsonTesla

6 жыл бұрын

She has the relevant subscribers, sadly.

@illegalquantity

5 жыл бұрын

I have to tell you, most of people aren't nerd :)

Ok, paused the video and watched all transformers movies. But i still dont understand this...

@pieterpretorius1014

6 жыл бұрын

these are electrical transformers. not giant cgi robots

@Marian87

6 жыл бұрын

You should have watched the animated series.

@Haruki_Aikawa

6 жыл бұрын

You have to watch the transformers movies in reverse, while angrily shaking your fist at a cardboard cutout of Shia labeouf

@yoy58913

6 жыл бұрын

Take another look at all the movies and then come back to us let us know if you understand now

@johanwise9713

6 жыл бұрын

The best is to wait until You finished primary School.

This is truly an epic video. Please make more stuff!

Ahh, these videos are so good! I hope you get back into doing these kinds of tech deep-dives like this someday!

You desperately need a whiteboard/flipboard. I love the "this is me at my lab bench" style of presentation, the cozy and familiar image of a geek in their natural habitat. But when dealing with figures and schematics I think whiteboards or flipboards definitely have an added value over sheets of paper held up in front of the camera. ;)

@error.418

8 жыл бұрын

+Juan Rial Nah, I liked her paper :)

@EvenTheDogAgrees

8 жыл бұрын

+Anonymous User personally I prefer Engineering Explained's whiteboard... Also opens up the possibility to draw new stuff as you're explaining.

@JohnWilkinsonTesla

6 жыл бұрын

I know! My own "lab" is a shambles by any comparison.

you are soo amazing :D i like it

THAT WAS SO COOL!!! Thank you for that. I've been a fan of "weird tech" for a long time, and this is such a perfect example of that. All the benefits of steampunk without requiring that it fail to make sense. This stuff actually works! It's also neat that you demonstrated it with (ignoring the really nice o-scopes) little more than a couple of rings and a stick of ferrite and some wire. Thank you so much.

This was fantastically organized and easy to follow for being such a complicated topic. You’re an excellent speaker... I wish you taught some of my EE courses in college. Keep being awesome.

What a beautiful mind.

Awesome Chick

Thank you Jeri for your investigation and explanation about ferrites and Magnetic field. Today I understand more what I made with an old ferrite from an old TV to transform 450 Ohms to 50 Ohms, with three parallel wires with 9 turns.

This awesome. Great job explaining a complex topic and it was really neat to see it working.

Refreshing to see an intelligent woman who is not checking her cell phone every two minutes.

@holetoanotheruniverse4690

6 жыл бұрын

spayderninja So true :/

@EnglishLaw

6 жыл бұрын

spayderninja agreed

@JohnWilkinsonTesla

6 жыл бұрын

You're not from around here.

Super cute, and single too.

Ok- My grandfather was a telegraphist since 1940 basically. I studied electronics in depth, and worked with it. (didn't graduate though, it was way too much money.) Jeri, you are now officially in my top 3 bingewatch channels. ^^"

WOW! That is insane how that works! Pretty amazing demo. I LOVE your DSO! (Actually I love your curve tracer too).

this makes me wanna push my ferrites in there

@NeoHoshi

8 жыл бұрын

+TheWieriekenshin LOL, that comment with that face....

@BPantherPink

6 жыл бұрын

HOW MANY ferrites DO YOU HAVE ??? Are you like that diphallic man??

@chrisdaldy-rowe4978

6 жыл бұрын

You keep yo ferrets in yo pants mon :(

Will you marry me?

@platinum4641

10 жыл бұрын

***** Good point, I met once long time ago, she was married :/ newer mind :) I wondering what what type of beauty she has, she is probably American but looks like, I don't know, maybe some Russian, Italian and Asian mix of beauty? Anyway I don't think so if her propose is to find husband from youtube. Internet (youtube or TV) is making life more difficult, in real world people can met face to face so they can both decide is they like each other, If somebody is on Internet than thousand of people watch them and if them write offers like "merry me" or "be me wife" I don't thing so if they will get any answer.

Every time I watch your videos, I learn that what I thought I knew, is not near enough to say I know enough about anything electronics. There is always more to learn.

just found out of her work via reddit. i have huge respect for this lady, extremely innovative and smart.

so... um? can it run crysis? lol

@hesaidthefollowing

7 жыл бұрын

lmao I actually luled

@JohnWilkinsonTesla

6 жыл бұрын

Crysis, 1970: "You are in an advanced suit. There are aliens coming from the sky. What you do? (A) Run, (B) Fight"

Are you single? ^_^

@sweetguy19762

7 жыл бұрын

I know she is like the prefect women, she likes electronics.

@ImTheReal

7 жыл бұрын

Owen Chase science channel luckiest husband 🙌🙌🙌

@sweetguy19762

7 жыл бұрын

Humberto Martins Ferreira Junior o wow did not know she was married.

@ImTheReal

7 жыл бұрын

Owen Chase science channel Wooow we have one chance 😻

Ha, ha, I'm old enough to remember this type of memory from when I was at school. We had computer studies and it was all this 'old school' stuff. We were being tough Cecil and a little bit of Basic computer languages. And programs were stored on computer cards and paper tape. I love all this old world, steam punk stuff. Hope to see more of it. Thanks for a great vid.

Hey Jeri. Thanks for this. I was researching it for a project and was very happy to find your explanation.

You are one of the coolest youtubers in my opinion

My father was an electronics engineer and used to bring spare components home so I could build crystal and transistor radios, back in the late 50s and early 60s. I remember him bringing a ferrite memory grid home for me to look at.

That was the best explanation of magnetic hysteresis and logic gates I've ever seen. We should have teachers like you, in college.

Very awesome explanation. I had all the background necessary from basic physics classes but never bothered to learn anything about electronic logic... it's not even that hard. You explained it really intuitively.