Using an EEPROM to replace combinational logic

In this video, we'll wire up an EEPROM (28C16) so we can read its contents. We'll also take a look at the data sheet to learn how to program it, and try programming some values. Finally, we'll see how the EEPROM can be used to replace any combinational logic circuit such as the 7-segment decoder from the previous video ( • Designing a 7-segment ... )
Support me on Patreon: / beneater
You can get all the components used in this video from any online electronic components distributor for a few dollars.
Complete parts list (everything in this video):
1x 28C16 EEPROM
8x LEDs
8x 330Ω resistors
1x 8-position DIP switch
1x 4-position DIP switch
12x 10kΩ resistors
1x 100nF capacitor
1x 680Ω resistor
1x momentary tact switch
1x Common Anode 7-segment display
1x 100Ω resistor

[@kahveciderin]

He just programmed an EEPROM manually. Here, take my like.

[@bobdagamer640]

Derin İlkcan Karakoç I plan to do that because I can’t get my Arduino to program it

[@Injudiciously]

I built my first programmer out of a PC using the 25 way printer port (and a couple of basic TTL chips). That was used to power 100s of displays around the UK. :-)

[@bobdagamer640]

L Guaire wow

[@harveykyle3690]

can i buy it?

[@Gipsy_T.]

and he only programmed 15 bytes, for my school i had to write 70 memory locations

[@masso172]

I fell asleep watching youtube last night and today I woke up to this. I started with cat videos.

[@solidhit2]

Please, don't stop making videos like this, they are solid gold for knowledge seekers.

[@DupczacyBawol]

And for future generations.

[@aristoshd]

Agree! Subscribed!

[@BillAnt]

I'm afraid basic chip programming knowledge like this might become a lost art in the future, but thank god for Ben Eater for making a really great videos as a reference material for future generations. :)

[@dowskivisionmagicaloracle8593]

Yup, 17 minutes just to create an electronic version of a punchcard!

[@caffeinato]

Honestly looking at a modern CPU from the top-down without having studied it is super intimidating. It's like looking at the top of a mountain and wondering how in hell you're supposed to climb that monster. But everything is just many layers of simpler building blocks, computers are no exception. I never thought I'd end up being interested in electronics like this, but these videos for some reason break things down in a way that just immediately makes sense. And people who only build upwards without understanding the foundations will always breed in instability.

[@sl9sl9]

You explain things so well that even complete newbies mostly understand what is going on. A rare talent indeed, please keep making more videos like this one.

[@DrBouwman]

You are the Bob Ross of electronics!

[@rickyrico80]

Mr_Good_Will "let's add a nice happy eeprom here in the corner."

[@Meneltour27]

Mr_Good_Will and behind the eeprom is a bug hidden... but its your bug.... a happy bug... dont tell anyone about it

[@proccessingunit2337]

"Well that doesn't look like a 2. Let's fix that" See, if that was me, I wouldn't have an EEPROM to fix. It'd be on the floor after having flipped my table

[@michaelhawthorne8696]

RickyRicardo80 That's soooo Bob (RIP)

[@DupczacyBawol]

Who is Bob Ross?

[@cburgess7]

Other people: I'm going to buy an EEPROM programmer You: I'm going to build an EEPROM programmer Greatly enjoy watching these

[@mohammedjavidh9225]

Nice 👍👍

[@c3a118]

How do you know what resistor to use

[@bobdagamer640]

Mr Arsonist they are current limiting resistors for the leds Hope that helps

[@noamlima9402]

me joking :im going to create an EEPROM from scratch

[@rupadarshisamanta3288]

Noice 🔥🔥

[@amber1862]

Can't believe how lucky I am to have found this channel.

[@mistervoldemort7540]

proud to be geeks :)

[@migueld2456]

me too

[@Dejwv_]

same !

[@May-sy9jk]

haha

[@smiley235]

Me too. After a shit day of work, seeing this video uploaded makes it all better.

[@YourUNKus]

This was exactly how we toggled in the instructions and addresses on the high school's first computer a PDP-11 (1972). It was a great relief several months later when the keypunch / papertape reader arrived. These series of vids are a national treasure ... great job Ben !

[@melkiorwiseman5234]

Wasn't that where the phrase "booting the computer" came from? You had to first manually program in a short "bootstrap" program which could read the paper tape reader. The short program would then load in the "operating system" from the paper tape reader and hand control over to it. The process was likened to the old phrase of "pulling one's self up by his own bootstraps" hence the name.

[@arminro3686]

"international treasure"

[@lookupverazhou8599]

​@@arminro3686 interplanetary treasure.

[@Havron]

​@@lookupverazhou8599Intergalactic treasure!

[@garydunken7934]

Ben, I can imagine how much time it would take you to make a video like this. I really appreciate your effort to put out these super valuable educational videos. Often I see people with good knowledge who are bad teachers or could not explain things very well. But you are special; you have the knowledge and good at explaining with practical experiments. Thank you.

[@regiondeltas]

Couldn't agree more - what an incredible piece of teaching. Absolutely fascinating to watch

[@skmgeek]

555 likes... it's a message from the IC gods

[@Devin82m]

I'm a DevOps Engineer, but really started to get into electronics about a year ago to compliment my ham radio knowledge. I have to say your videos are some of the best videos I've seen on digital electronics and you have helped me so much here recently as I've gotten more up to speed. I really enjoy Mr. Carlson's Lab, but you cover modern electronics much more than he does and do just as good of a job with quality, logical progression, professionalism, and clean presentation. Thank you so much. :-)

[@Rage67]

I love that you even explain why the LEDs and Resistors were asymmetrical. Your attention to detail is fantastic, and calms the OCD part of me.

[@purboyy]

Well if you see my breadboard builds your ocd will jump outta you to kill me

[@m1geo]

I have a PhD in electronics, and work in a well known top tech company doing this stuff most days. I just wanted to say this is amazing! I love it! I could watch this for hours! I've subscribed! 👌

[@MatkatMusic]

Sir, you are a hero among mortals!

[@BillAnt]

Indeed, excellent video for old timers to brush up on a bit, and newbies to understand it with a hands on approach. Not sure if it was mentioned, but the CE/WE/tAH/tAH/ timings are really only important if using an app/terminal to send a programming data stream, where care must be taken to hold those lines for at least the minimum timing as per the specs. While doing manual programing, the timings are irrelevant, since we can't toggle the switches fast enough to make a mistake/overflow ;) Btw. I've still got an old UV eraser somewhere in the attic.. he-he

[@dowskivisionmagicaloracle8593]

Yup, 17 minutes just to create an electronic version of a punchcard!

[@RogerBarraud]

@@BillAnt the absolute timings (except perhaps some maximum tomes?) might be irrelevant - but the sequencing is still vital to get correct.

[@BillAnt]

@Roger Barraud < Correct, forgot to include the importance of the sequence. :)

[@andreycortez9700]

Among us

[@MrRipplefix]

When I was a little kid I was really enthusiastic about electronics but I had no one to teach me and alot of discouragement. I'm really glad to see you doing this to educate anyone who wants to learn. Thank you!!!

[@mindaugaspaskevicius2430]

That feeling when you get a notification that Ben Eater has uploaded a new video... You are awesome, Ben! Thank you!

[@Hardwarenerd]

same ..

[@execration_texts]

You are an absolute godsend to someone trying to learn electronics at an intuitive level.

[@MattHollands]

Your breadboarding is so neat. I wish I was that tidy when I breadboard.

[@ArachnidAbby]

yeah I just bought wire I can cut into small lengths so my breadboards could look like that

[@andywolan]

In high school electronics shop class, we were forced to wire our breadboards like that. In college, I was told I was "insane" for wiring my breadboard that neatly. Of course, if I had a bug or needed to replace a chip, it was much easier to debug than if I had a rats nest of wire to go through.

[@baruchben-david4196]

You can get sets of wires at lengths that are multiples of 0.1 inch, color-coded in a way similar to resistors. Red is short, orange longer, and so on. These make it quite easy to have neat breadboarding.

[@c3a118]

How do you know what resistor to use and when

[@Kanerade]

@@c3a118 There are guides online. You can google for the equations and such. If you are still confused, then try watching a couple of KZbin videos.

[@gillesbisson199]

Excellent series ! Very well done ! Just a small advice : care must be taken when using RC circuits to generate edge sensitive signals (like clocks and write signals were the rising/falling edges are more important to the target circuits than the levels themselves). In the case or this EEPROM, the datasheet specifies that the falling edge of the /WE signal will latch the address and that its rising edge will latch the data (and I assume start the write operation). In your example, your RC circuit generates a clean and very well defined falling edge, but a very slow curvy rising edge which some circuits may fail to detect as such. In datasheets, you will often find specifications about how quick the falling/rising edge of clock signals should be in order to be recognized.

[@Tonikiller10000]

Hey, i want an another opinion.i want to use an eeprom at one project on a pcb

[@Tonikiller10000]

I inverted the adresses order and data pins order, can it work normaly, i mean to be more easy , i puted for example in order at adresses A7,A10,A8,A9,... if i write and read in the same order, is any problem?!

[@RajJaiswal538]

Well, I dunno much about it but an inverter and an and gate that Ben specified in a video should give a sharp falling and rising edge,right?

[@Tonikiller10000]

@@RajJaiswal538 i think all ar the same (cd.. or 74ls...) and as a not gate i use cd4069 And the and gate 74ls08n.

[@TooSlowTube]

@@RajJaiswal538 The correct way to do it is with a gate that has a Schmitt trigger input. For normal gates, the behaviour is not necessarily defined, when the input is transitioning slowly from one state to another.

[@BernhardHofmann]

Every now and then, KZbin throws something into my recommend pile of nonsense that is pure platinum. This is the best video on electronics I've seen in years, maybe ever. Your explanations are clear, well placed, and clearly very well prepared. Thank you so much for the time and effort you've put in to share your knowledge.

[@LordNefarius]

I have a background in social sciences, and only studied computing in high school (albeit religiously). And I know none of this is easy but you made it look so very very simple. I actually got everything you were explaining. Everything is concise and to the point, and you explain it so well. It's a combination of your calm voice and thoroughness. Very well made!

[@ulilulable]

Ah, this is such nostalgia for me. I used some UV erasable PROMs to build a simple game back in my school days. The whole compiler/assembler and all programs I made fit nicely into one floppy disc with room to spare. The computer connected to the programming unit had a full megabyte of RAM... Good to see a more in-depth description of this than what I was doing.

[@baruchben-david4196]

A megabyte of RAM! With that kind of power you could take over the world...

[@BillyBob-qu1fs]

@@baruchben-david4196 He doesn't even need to download any more!

[@conpa18dany]

At the end when he was switching on and off the gates manually! It clicked, he was doing what fundamentally every computer does while executing instructions. Wonderful just wonderful

[@joeyquillen5804]

I...LOVE...THIS... I can't think of a more satisfying pastime in this day and age than making your own computer (one sub-system at a time). Just... thank you, sir.

[@BryanChance]

A year's worth of classes in 25 minutes. Thank you so much.

[@AmirIskandar]

I know all of these things because I studied them 2 years ago. But I'm watching this because I am so mad at myself for not finding this channel earlier. You explain things so well and in an entertaining way. God I wish I have a time machine.

[@saldownik]

It blew my mind that you had all the bridges of exactly right length for the circuit. Good quality.

[@MW2ONLINEGAMER100]

I'm a final year Electronic Engineering student and this video just entices me so much I love it. Thank you!

[@softdorothy]

So calm. Every problem you encounter you proceed to solve without anxiety but with a cool, logical, resolve. Your videos are therapy.

[@josueolivos3783]

im taking my first digital logic class in college and your videos have me hooked...the knowledge im getting is indescribable. Thank you for these videos..its truly amazing what great minds have done!

[@abdelrahmangamalmahdy]

Creating that teeny tiny down-going pulse with a simple RC Circuit was such a brilliant idea.. I'm totally impressed!

[@HuskyNET]

I probably would have chosen a microcontroller for this task :'D Such a nice and simple solution indeed!

[@selvamg635]

I dont have word to express about your explanation that you did by using components rather explaining in board and spending your lot of time to present this appropriately without any compromise. I am thanking you to make me well understand of the EEPROM programing. You are well good teacher since you understood how to teach by which way.

[@heittpr]

8:14 address 0 - all ones address 1 - all ones address 2 - all ones address 3 - all ones ben: you might be noticing a pattern here me: what could it be!??

[@plutarian7396]

first commento

[@megamer2340]

I don’t know, what is it???1?1?1?

[@m101ist]

Don't look at it too long and try to find a pattern, you go cross eyed. 👀

[@CHRlSTO1964]

- good instructor - that was an excellent explanation of timing chart Parallel EEPROM R/W , addressing - fundamental concepts that never more easily understandable

[@johandeklein5253]

Wow, found your video card video. And you tube is playing this one. Impressed.

[@陳先生-c3x]

you are great teacher, i am 35yrs in electronic field,and i also knew eeprom use for what, but never think that easy can use in my own circuit, thanks that's geat video..

[@new-knowledge8040]

This stuff brings back memories of the 80's. Back then PAY TV came out and so lots of folks tried to make their own decoder. The pay system back then was mainly based upon the suppression of the horizontal sync pulses(HSP's), which lead to the TV losing horizontal sync. The HSP's were however still normal throughout each vertical sync pulse. Typical decoder circuits used a PLL circuit to lock onto these remaining valid HSP's, and then inserted proper HSP's back into the rest of the baseband video signal where the HSP's had been previously suppressed. But that is a lot of components. A lot of components pulls a lot of power, so you need a power supply rather be able to take advantage of one that already exists. So I designed a simple line by line decoder instead. It required 1 MC14066B, 1 MC14538B, 1 LM393, 3 transistors, 3 diodes, and several passive components. Total power consumption was less than 15ma. So it was simply installed into a TV converter between the RF demodulator and the RF modulator, and it used the converters +12v power supply. With it being a line by line decoder, there was no PLL locking delay, and no stabilizing delay. Fun stuff !

[@atari7001]

I wonder if the parallax propeller or the arduino could be used to add the sync, these days? This could have been a remarkably simple method, had the hardware existed, then.

[@mitulbabu]

The way you start the video - explaining what each letter means - is wonderful

[@rich1051414]

The xenon flash from a camera(partially) erases EPROMS nicely. I learned that the hard way.

[@Silverdev2482]

F

[@bobdagamer640]

F

[@itspersonal7469]

F

[@dangogh7419]

F

[@omniyambot9876]

F

[@rijden-nu]

Wow. I am amazed by how much of this video I can understand. In 25 minutes I have finally learnt: 1) what an EEPROM actually is, 2) what a "programmer" actually means (I'm looking forward to watching the next video), 3) how to wire a breadboard beautifully so that everything is and remains totally readable and obvious and 4) how to use a capacitor+resistor for a very short blast of voltage (and how to calculate it). Thank you!

[@bharathvn3355]

No KZbin channels explains simple topics with practical examples like you do :) Keep going (y)

[@RemideCaes]

Love your videos. The patience you have in your voice is just what i need. I am recovering from brain damage and lost lots of my knowledge of electronics. Your videos are helping me recover my knowlage and learn new things. Thank you.

[@realcygnus]

Superb content ! This brings back great memories. Electronics is one of man's greatest inventions/discoveries. I remember when Digital really started becoming a thing. & also when UV EPROM's begin replacing PROM's & very clearly when EEPROM's started replacing UV EPROM's, it all seemed like magic, what will they think of next ?!, & here we are, with powerful PC's & the net & all, in the information age.

[@c3a118]

How do you know what resistor to use and when

[@liviuconstantin9960]

The word "impressed" doesn't even begin to describe the way i felt. I don't usually write comments but I couldn't help myself in this case. Sir, hats off to you! I enjoyed every single (nano) second. Very through from design to build, neat and detailed. The presentation was very focused, very clear and even myself I understood it. And I think it's for the first time that I watched all the way to the end.

[@BurtMeister]

Excellent work sir! This is the second time I have watched this and it has sunk in better this time as to what is going on with the chip.

[@justinhawkins5373]

I'm an electrician just getting into solid state electronics and arduino. This, sir, is perhaps the most helpful video on just about anything ive watched on youtube thus far. Please keep up the good work and continue doing videos like this. As a previous poster said, PURE GOLD

[@maxscribner1743]

So wonderful that you are making these again! Keep it up, so interesting!

[@ponbapanda2935]

Even if you have no interest in electronics the satisfying wire arrangement is enough. If you love electronics you're in literal heaven

[@rikka0_059]

That is how LuTs(look-up tables) in FPGAs and CPLDs work. Nice video!

[@joedfazio]

Thank you! what great memories for an engineer who designed digital circuits back in the `1990's . Good learning aid for digital memory circuits. Pull down resistors, timing diagrams, write pulses, fun stuff!

[@slydog75]

These videos are truly amazing. The amount of time you put into them is crazy. Especially with all of your pre-made jumpers.

[@pedroPfxr]

I always wondered where he would get them from... I thought these were bought xD

[@King_Kato]

I am into my 4th semester as an Electrical Engineer and I have a newfound love for your channel. Thank you for all of this man! Can't wait to start building useful circuits for projects.

[@whynotanyting]

"Yes, I program in binary." Great video. Thank you for being concise.

[@bradley1995]

I'm so depressed but watching you display some knowledge helps keep my mind stay a little busy. Thanks bud

[@pdrg]

This is great work Ben, thank you so much - really clear, clearly planned well, excellent resource. It really covers the gap between where I learned upto back in 1988(!) and refreshes, covers the gaps between then and the evolution beyond, etc. Really great stuff.

[@kingsman428]

Used this technique 20 years ago for HNC final year project. I had sine and cosine amplifiers being driven by D to A convertors, the D to A convertors were driven by an EPROM with a clock being driven from a low pass filter being fed from a music source. The amps controlled 2 mirrors which deflected a red laser producing circles, squares and triangle patterns in time to the bass. EPROMs make great look up tables but they are slow and not as quick as combinational logic. Thanks for the trip down memory lane, a very nice video.

[@qqb0t]

I have no idea of this kind of electronic,but here I am, sub'd and watching the video nr 20 in the middle of the night

[@jeddak]

Great tutorial. Watching someone build up a digital circuit while explaining it is so much easier for me to understand than studying a page in a notebook.

[@luigif6643]

Great and simple explanation of how a "lookup table" and and FPGA works 😉

[@kmanev]

What I was thinking.

[@randalllim8113]

i wish i came across your videos when i was studying EEEng.. a tutor/lecturer like you would have been a godsent.. keep making these videos, they make the world a better place

[@paulmoffat9306]

In the 1970's I used the same idea for a memory address decoder, using a fuse-link Bipolar PROM. Other uses would be fixed tables of constants, character sets etc. However, the availability of small devices is very poor today, as the direction is to massive storage, and frequently, serial access.

[@rikka0_059]

Today we have FPGAs and CPLDs, they do the similar job, and you can program them on PC. Some CPLDs are even cheaper than this ROM chip!

[@ravikumaronweb]

One of the greatest videos of recent times, Explaining most of Electronic basics.

[@DrBouwman]

Awesome, just freaking awesome! Educational value through the roof!

[@bjornotto98]

Is there any real life uscase for this nowadays?

[@BillyBob-qu1fs]

@@bjornotto98 I'm learning this stuff to build automated machinery for our farm. Most of the things built will be modules slaved to a master computer. Much cheaper, simpler, and more durable to use EEPROMs and low level circuits for the modules instead of having Arduinos or RPs everywhere. For more complex modules a higher level thing might work. But mostly it will be things like measuring fluid levels and reporting them to the main computer.

[@imanqoly]

Speechless here, your channel is a university... 🙇🏻‍♂️

[@parvatkishan3850]

every video from ben is a treat👍😃!

[@kevinb.8649]

Why can’t all videos make that much sense? U go from start to finish and even proof in a logical way. Wow why can’t more people do this. Get it gets way more complicated but the fundamentals don’t change

[@lidarman2]

Good video as usual. Brings back my college memories (no pun intended). Curious how long it takes to make one of these videos. I can imagine a lot of set-up and several takes. These are a model of a good education video.

[@jeppechristensen5707]

Thanks alot, i'm normally a web and mobile app developer, so this is a new world for me.. But you managed to explain the EEPROM principle to me very clearly.

[@gciriani]

This was fun to watch. You could do your testing much faster if you went through the bit combinations in a Gray-code fashion; you had to toggle switches 24 times, in the sequential way you did it, 0-15; using a Gray sequence you would have to toggle the switches 15 times only.

[@user5812]

I'm certain he knows all about Gray code, but explaining it to beginners is outside the scope of this presentation.

[@rogerjones8809]

Gray code is cool changing only 1 bit at a time, thanks for refreshing my memory on that.

[@abdbach379]

I remember when we learnt this method in combinational logic in the second year of engineering and I'm happy to see people are interested in it! Sir, you've got a subscriber! great explanation

[@maciejszpyra]

Is there are a chance you will make a tutorial about good practices of building circuits on breadboards. How to plan them, cut the wires, how to make them so tidy etc.?

[@ArnaudMEURET]

Here it is: kzbin.info/www/bejne/hnaQkKWAptt3nrM

[@CZbanhof]

Wow that's actually a great tutorial. I have used EEPROM as a microcontroller peripherial in the past, but never thought about it on the low-level scale you are suggesting. It never came to me that one could actually use it to implement logic. So simple and genius!

[@ArtemKreimer]

I've loved this whole series so far and the rest of your videos. One thing in particular that I've been able to grasp now is how protons/electrons/atoms/elements become transistors and how transistors become logic gates and then how logic gates become all the other hardware you've explained. But all of that has needed power to latch states. Can you do a video explaining the elemental physics about how ROM latches states without power?

[@jonka1]

I heartily agree with all the positive comments below. I've often looked at these logic timing diagrams and for the first time they make perfect sense. Thank you for wanting to do this for your viewers.

[@zetaconvex1987]

'A' for effort, I'll grant you that. Phew. I can't imagine how much time it would have taken you to put that video together. By a strange quirk of circumstances, I was mucking around with a bank of 8 7-segment displays. Uses a MAX7219 chip. Let's just say that it's a bit easier than doing do it your way. Although not as educational, of course.

[@nottherightone2]

I used to watch these as a kid and have 0 clue what’s happening! Now it all makes mych more sense, thanks :)

[@XpressCrosSs]

you are awesome man thank you ! i've learnt so much thing than my digital logic + microprocessor courses

[@NishantKathiriya]

which university were you studying in?

[@roladun]

No words can describe how beautiful your explanation is... this is golden, just building a circuit like listening to a soul music... incredible

[@teknoman117]

Such beautiful breadboard organization!

[@alexgoldman2569]

xD. that's the only reason i watch these

[@ELVTechnology]

Your videos have helped explain a number of things that I've never understood or fully understood in electronics, especially as I'm just a bit curious as a hobbyist and not something I do in any professional capacity. I love the fact you demonstrate the bare essentials without microcontrollers (which don't get me wrong, microcontrollers are awesome), but there's just something about seeing things done "manually" that really drives the point across and which really helps understand what's going on behind the scenes and is something I haven't come across in many channels. I never knew you could write to EEPROM's so easily, although when you think about it it certainly makes sense. In short love your work, very unique content and I just wanted to take the time to say thankyou. Watching your videos has given me a lot of "oooooooooh that's how it works" moments and has filled a lot of gaps in my knowledge.

[@dlbattle100]

The main thing I'm learning here is how to do insanely neat breadboard wiring.

[@mohamedhassane6347]

I took digital design 1 and this semester i'm taking Digital design 2. This videos are helping me a lot

[@iamruss74]

Finally! could not wait :)

[@christianpaulo5687]

MAN PLEASE DON'T EVER STOP!!!! I WILL WATCH ALL YOUR VIDEOS AND SHARE IT TO MY STUDENTS!!!

[@stefanosbek]

You just explained 3 years of computer science in 25 minutes.

[@crateer]

Where did you Study? Bikini Bottom? Because then i would understand why this seems like a 3 year study

[@joyange1]

Of course! That's how collages and universities make their money. If they didn't drag it out. They couldn't charge you more tuition.

[@xxportalxx.]

@@crateer not to mention this is much much closer to computer engineering rather than cs

[@vicktorioalhakim3666]

HAHAHAHAHAH ... no. What he explained is basically

[@jantube358]

@@xxportalxx. Can you explain the difference? :)

[@TheJynx2011]

What solidhit2 said. After I watched your 'worst graphics card' video, I was hooked. You give an outstanding explanation regarding what you're doing and your thoughts on the matter. I am seeking to learn more about electronics and your channel is amazing. Thank you for putting this content out for free!

[@Redh0und]

expose them to u l t r a v i o l e n t l i g h t

[@BertGrink]

be careful around the gan green, though.

[@TheChrisey]

10w ebay laser

[@abelincoln7473]

Ultra-Violent Light..... Hmmm is that when you smash things to bits with a 6-cell flashlight?

[@hellobye9178]

styropyro xD

[@noamlima9402]

😁

[@vitalijletko2828]

Thank you for this humbling experience on how complicated even a seemingly simple task really is.

[@Galluxi]

A new video! Yeah!

[@BrightBlueJim]

This video reminded me of one of my greatest "aha" moments in electronics. I was puzzled about how the spectrum analyzer I was using, a Tektronix 7L18, was calculating its reference level, since this was affected by both the input step attenuator and the I.F. gain control. Long story short, they used a PROM to do the calculation, and this was a real eye-opener for me. Thank you for the video.

[@mitikox]

I really like how you program it by hand! How can I do so with a microcontroller? 8051 for example?

[@naboulsikhalid7763]

this is out of line with other programming facets, and I really watching these bits moving and doing patterns makes computing more attractive, than just copying a program and launching it, without knowing the bits' involvements. thank you for all these beautiful BITS.

[@tzisorey]

Heh, I remember my first EPROM to make a voice synthesizer for my Commodore64 - had to re-program it after my electronics teacher held it under a fluorescent light/magnifier for too long, inspecting the soldering.

[@A_Man_In_His_Van]

I have been a general motors dealer technician since the 90's. When I started, if we had to "flash" a computer, or do an update, we would pull the eprom out or the aluminum computer, and lay them under the UV light we used for florescent dye detection. Then replace it all and flash from the tech 2 files we stored/updated using dial up. Ahh the good old days, lots of ruined chips...

[@tzisorey]

@Sean Stevenson Fortunately, it was an electronics class, not a computer programming class, so they didn't have to look at the programming - just made sure it powered on and did things when you flipped a switch - and there was some sort of demo data that the voice synthesis chip played if it received all zeros as the data.

[@striker44]

If YT gives out nobel price for electronics teaching, you will get it. 👍 you covered digital logic, timing diagrams (setup/hold), RC timing and switching waveform, pull down/pull up, debugged on the fly and many more. Brilliant!

[@salvatoremancuso6060]

Now I feel the urge to buy an EEPROM chip

[@deankay4434]

WOW, Ben...Best ever video ever on EEPROM’s coming from ASE Master Tech since 1978, who later taught techs just to be comfortable with a DMM, voltage drop, etc., but nothing on this level. I have worked with EFI early on. I have seen the evolution of electronics used in automotive applications. Changing the PROM from 1 ECM to the other, or replacing the PROM that has updated info to correct a problem. The light on the road changes from green, then red, you let off the gas. The injectors shut off and air idle closed. It will stall if not opened at the correct time with slower speeds. The new data changed that, problem gone. The EPROM’s, now EEPROM’s operate via class 2 serial data, ns of 0 vDC to 7 vDC. Software is now updated with a scan tool or J2534 pass-thru, but it erases that part, using an address, then re-writes new code from OEM engineers using a tech, scan-tool, thousands of lines of code to fix a repeatable known problem or even make it better for the customers experience. I joked for over a decade that we are driving fuel powered computers with room for the driver and some of their stuff. Today, with 20 - 45 electronic modules / nodes on a network using up to 5 different types of serial data. It does not make the vehicle cheaper, but reduces the cost of labor to correctly diagnose the root cause using buttons in many cases. I have a much better understanding with your information and the complete method in showing it. Thank you very much. It takes a lot of effort to put this into a clear video training format. I applaud you. Maybe I could harvest the drivers info center from an 03 SUV, place it in the console of my 67 C10 driver.

[@renakunisaki]

Seems like it would have been clever to hook up the display before programming, so you can see it's correct as you program it. Next up, using ROMs to replace the NANDs in your video card?

[@kristerytb]

You give a very high quality of to explain things. A good balance of what time, seconds, should be distributed to the different subparts of the subject. It is easy to hear and understand every word, and NO MUSIC, great.

[@voonhoisuen2129]

thank your teaching.

[@hgbugalou]

You have taught me more than any other creator. Bravo.

[@dakiloth]

Why do breadboards have missing holes on the power lines?

[@alexgoldman2569]

idk. maybe to differentiate it from the other pins

[@dariocasagrande3975]

Some breadboards power lines are divided in two parts per side, just in case you want to have different supply voltages on the same line, like 5V and 12V