Hey all, this is a topic I've been fascinated by since intro electromagnetism when we first learned what capacitors were, and how you could apply them in a grid on a smartphone screen. Cool stuff. I'm glad to have a video out about it, and I hope you enjoy.
Surely this must be just part 1... the emoji isn't sent yet. You need to follow up withe actual transmission over Wi-Fi/cell towers, etc until the emoji lits up on the other person's screen.
Imagine trying to explain ignoring a text message to a caveman. "Well, I have this rock that I can input my thoughts by touching it with my finger, and then it sends those thoughts through the air to my friend who is several day's walk away, and he gets those thoughts on his rock. He then ignores it."
“I told him, but he forgot.” Ignoring a text message is no different from that. If you want to explain how you told your mate, that can go many ways, depending on whether you want to explain what you did, how you did it, how it works, how it is supposed to work, or why it doesn't.
Your website and videos are brilliant. I have just come upon them by accident today. Your enthusiasm, curiosity, and thirst for understanding are inspirational and infectious. You also display an excellent talent for explaining complex ideas through simpler analogies in a manner that focuses precisely on the idea you are explaining. I don't know your current career path (sorry, like I said I just discovered your channel today) but I think you should seriously consider working full time as an educator (if you aren't already). Outstanding work! (I'm a physics teacher by the way).
Fun fact the four 1's at the start of the line of bits (1111) at 4:13 tells the computer to take in the next 3 sets of bits (bytes). This is how it can tell where the command for one thing ends and the next one begins :D I was expecting a much more general overview, but i like how specific it got. it's cool how into the electronics of the screen you got. Keep up the awesome work Physics Girl!
loved the use of anagrams. Made me understand much easier. Also the recapitation of the whole information offered in the video. This made the video much clearer and tightened any lose-ended facts. can't wait to see the next video!
Thank you! With limited time, it's hard to get down into the details, but the most interesting part to me is how your finger can affect a capacitor enough to control a screen.
When I first watched a video from this channel I was like: "For the first time in my life I got interested in physics", and this video should attract much other people like me. This channel is so much better than school and I understand so much more with her than with my actual physics teacher.
Great video, very good information for what it covered... but I feel I got 20% of the story! I was hoping you would actually continue on much further, with a (high level) explanation of how messaging software handles the outgoing text message and turns it into a network message, transported as a data packet over TCP/IP and wireless networks, touching on what network protocols are, and how phones connect to cell towers, receiving the message and displaying it on a screen made of a pixel matrix composed of LED components... I wanted to hear about the entire "life of a text message" from touch on the sending end to display on the receiving end. In any case, great work! I very much enjoy your videos and I feel you are doing a great service to us all, educating us about subjects we are not always familiar with. that's only reason I wish this video hadn't stopped where it did :)
From a Programmer's perspective, I'd like to add one thing... The touch screen contact point is translated into an X-Y coordinate, and the programmer uses it as a coordinate to determine what you touched (which button, image or anything else). Leave the complicated stuff to the hardware guy. For the programmer it's just a message signal with X and Y coordinates.
Surprised you didn't mention the scale of calculation the phone does at all. From touching the screen to seeing the poop emoji about half a billion calculations took place. When the data hits the processor, it gets handed through several layers of code, interpreted by each into something understandable by the next, all carried out on a grid of switches powered by rusting metal. It's freaking incredible.
There's a LOT more I'd like to get in to. I used to program and I'd love to talk about code, but I haven't figured out the right way to tie it in to physics. Suggestions welcome!
could you maybe talk about how much energy from a battery is used in doing something like calculating 2*2? it would be interesting to see how the energy used to do a calculation through programming compares to the energy a human uses to do the same. another way is to talk about a simple adder circuit and show how to do math using simple on and off switches with current going through them. i look forward to seeing your future vids :)
Physics Girl Maybe a mini series about how physics uses computers and particularly really smart code to do physics? Talk about something like the LHC, or computer simulations. I think especially computer simulations would be eye-catching at least. That way you get to talk about both physics and the code that we use to figure out what the heck happened in that little big bang we just made.
nope, nowhere near half a billion calculations to do that. that would mean a 1ghz smartphone would take half a second to display the emoji after you requested it, and it's obviously not nearly as long. in fact, if correct for the touchscreen and screen input delay, the delay would be in the order of microseconds. more like 50 thousand calculations. and that's low level binary gate (true or false) operations.
Physics Girl Dianna, THANK YOU for making all of your videos. I am 74 years old and have had life-long struggle to understand math and physics.. You make it easy for me to understand complex subjects. I hope that your videos to inspire the new generations of kids
Yeaaahhh... I'm a electronics technician and I have to say that this is a reeeeally good way to describe all the electronics inside the phone... thumbs up =]
I feel like Physics Girl just put together the pieces and came to the understanding/realization that there is no imaginary hardware/software boundary, and it's all always just been electrical high/low pulses through logic blocks. Computer Engineering is awesome, highly recommend to anyone.
Nice Video. And thanks for Thorn I am going to use it when I need a new variable in a theory. Some already run out of good letters for physical concepts (yes I am looking at you charm and strange quark)
It didn't…quite. In shop or pub names like "Ye Old Curiosity Shop" that's not actually a "Y" it's "Þ" and "Þe" is pronounced exactly the same as "the" ;-)
I always wondered how touchscreens know the difference between a finger from another object. Ever try using a pen cap? It's all in the charge. Makes you appreciate the genius engineers and scientists that create these wonders. Thank you Physics Girl.
Dear Diana, you could have done better on explaining how the signal gets interpreted. For example with something like this: The electrical signals from your finger are interpreted in such a way that the position where you touch is determined. That gets sent to the phone's main processor which also knows which emoji is currently displayed at the position where you touched the screen. And so on. Just don't skip so much of the general computer knowledge, but rather include it in your explanations! I know it's just software and from the standpoint of a physicist, this is boring, but hey, most of the stuff that goes on in our phones *is* software, interpreting the phsyics around it! (i.e. when you find a Pokémon at a certain location).
I'm a comp-sci major and I had to take a certain amount of physics to get my degree. Just enough to understand circuits, really. I couldn't believe it later when I connected that up to typing on my keyboard and how operating systems work. Didn't know the stuff about touch screens, though, thanks for that.
I really hope that you're feeling better soon!!! Every single one of your videos (except for the updates on your long-Covid condition) fill me with joy. You totally rock, and I tell way more people about your channel than who care to listen. :D
Hi Physics Girl! Great video on the physics part! Although I think you're mixing the whole process between the touch and the poop emoji... The touch-screen signals the operating system the position of the finger's touch, not the code that uniquely identifies the poop emoji. That way the operating system knows where the user touches the screen, and in your case, in the keyboard with the poop emoji, that will communicate with the messages app the poop emoji which has that unicode to uniquely identify it and write it on the text field.
For me, very fascinating is the sending process. The fact that whatever I do on the internet, hundreds or even millions of packets are sent each individually, each "find" their path to destination, and then arrange perfectly to form a meaningful thing. Just to send this comment, countless packets had to be sent over the sea. It always makes me appreciate just how awesome internet is when I think of it. And there's so much behind it, regarding all the protocols and stuff.
I've been studying computer engineering for 2 years now and the video is so full of oversimplifications and half truths that it makes me rethink whether I should stay subscribed.
I bought my first CP/M computer in 1982, my first Dos computer in 1985, and my first Windows based computer in 1988 (Windows 286). My present smart phone has (much, much) greater computing power and storage capacity then each of these three desk tops. Modern smart phones are wonders of engineering.
The most fascinating thing to me about cell towers is the structural engineering that goes into the cell network, and all the protocols used to send text vs. relay calls, and all this 💩 I know almost nothing about. So maybe it's time to make that video and learn.
Thank you for your videos. They are exellent. When you get a chance, please explain the physics of computer chips. They are in everything but there are very few layman explanations of how they really work.
The touch itself turns into an estimated pixel coordinate, which then is used to figure out which emoji you picked. The pixel coordinate relative to your phones resolution allows the apps and software on your phone to know where you touched.
Actually something cooler is a better conductor. The reason is more biological. To conduct you need oils and water over you skin. When it's cold the formation of the pores and dry skin makes your skin less conductive.
AJD is right, only metals conduct better when they get colder. Semiconductors and nonmetals *decrease* in conductivity with decreasing temperature, the exact opposite of metal. However that's not the reason, touch screens are capacitive not resistive, you don't even need to physically touch the screen for it to work. Additionally, dry skin is perfectly fine, you don't need oils or water on your skin for the screen to work. Your skin is alive and thus full of water. The reason it may not work is if there is a thick layer of dead skin on your fingers, dead skin doesn't contain any water.
Great video! I have a degree in computer science and really loved how you tried to explain the essentials of how touch screens (or input devices in general) work and how the computer transforms the electric signals into well-known data representations. I'm really passionate about science and about my job, and I find it often frustating how my job is a complete mistery to 99,99% of humanity. Thanks for making an effort :) Ps. If you would like to continue with some computer science stuff related to physics, I think there is another very interesting subject: How to do deep space data transfers, taking the New Horizons as example.
Okay PhysicsGirl.... ummmm I noticed that you Recorded your Opening Frame and Closing Frame at about the same time..... I'm looking at the SUN light in the background.. :) ... I'm also trying to figure out how long it took you to record this video... I see that the sunlight is shining on your Table.. at the start.. and with all the CUTS and Take 2's.... the sun has moved to behind you, hmmmm I'm guessing it took you 2.5 hours (or more) to complete the video... The sun's light on the corner of the house.. the Table.... etc... see for yourself!!.. :D OBERSERVATION is the KeyStone to Revelation.. :D (and no, that's not a biblical reference)
LOL.. well thanks for responding... what I meant to say is, GREAT VIDEO!!.. You explained the way the Touch Screen works!! with great diagrams!!.. THANK YOU! :) ... you really are a great presence here with all that you share with us.. I wish all the best to you and for you. Keep up the great work... you'd be surprised at the size of the SILENT Majority that don't give you the feedback you deserve.. but THEY ARE ALL THERE.. ..:) Peace always....
3:58 Very, _very_ simplified. Well, it has to be, I suppose. However... 4:14 This is the UTF-8 encoding of that character. UTF-8 is used for storage and interchange, but not generally for internal representation; for that, it's much more likely to use something like UTF-16 or UCS-4. Also, all of these encodings are part of Unicode, and it's not even clear yet that you're touching a button (what's a button, anyway? the chip has no concept of that), so you're getting a little ahead of things. In reality, the chip is most likely figuring out the coordinates of where you're touching. This then gets sent to the operating system (still simplified), which then notifies the app that is currently displayed. The app figures out what touchable widget is at those coordinates, finds out it's the button for "insert the U+1F4A9* character", then adds that character to the string in the text box. Later on, assuming whatever protocol the app is using requires UTF-8 encoding, it converts the whole string to UTF-8, so that U+1F4A9 gets converted to the representation shown at 4:14. * "U+####" is standard human-readable notation for Unicode code points, with the value in hexadecimal. 4:31 Hehe. "Roman alphabet", you say, as it clearly shows a Greek letter. :-D A very appropriate letter, though.
OMG PLEASE NOTICE ME I LOVE YOU SO MUCH You helped me so much I loved think you are AMAZING! AND I always wondered what made the phone do something when you touch it THANKS!!!
You love smart women but do you respect smart women? Probably not as much as you think and I'll tell you why. When I was in college, I knew the material pretty well because I would study for 5 to 10 hours per day, 6 days per week. That's a little less than 1,000 hours per semester, and I made a lot of sacrifices to put in those hours with my class schedule, commuting, and work and so on. Because I was typically ahead in the class, I would frequently explain the material to my classmates. One of them apparently had a crush on me. I didn't know this at the time. He never told me. Never asked me out. Never really struck up a conversation with me. But what he would do is ask me to explain something, and I would obliged to help a fellow classmate out, but while I was standing there using my time to explain something to him that I had spent hours of my life that I couldn't get back learning, and time explaining something to him that I could have spent making my own life easier, he wasn't really listening and learning but standing there spacing out and getting off in his head. He sexualized me and trivialized something I had put a lot of work into and wasted my time for his semi-sexual pleasure. No thanks. I'll take the guy who actually has a little more respect for me and my time.
WOW... so , Diana...where in the world did you learn all this at such a young age..?? Amazing and a great video. I have another question?.. How do I get my motorcycle gloves, or any gloves, to be touch screen sensitive or work with my phones ? I've read alot about liquid products, graphite, some types of thread to see onto your gloves..etc.. I do have some touchscreen gloves and my thin nitrile gloves also work. ??? Why ..don't know.🤔🤔..but I have a pair of heated gloves that I want to use with my phones.. so, since you seem to be the expert on this 🤙👍👍👍I'd ask..😁thanks for any information you can give me. Looking forward to your other videos.👍🤟
Ummm… The only physics mentioned explains the working of the screen. The rest were all just a pretensious cluster of electrical terms which don't explain any physical phenomenon. This really should just be called how a capacitive touch sensor works
On some phones you can actually see the capacitive touch grid of your screen. Just hold it so that it reflects the sun (while not caring about whether you see what's displayed on the screen, or even with the screen being off), and you will see a regular pattern of dots. That's at least part of the capacitive touch grid. I was able to see this on a Sony phone as well as on a Huawei phone from like 5 years ago.
Hey all, this is a topic I've been fascinated by since intro electromagnetism when we first learned what capacitors were, and how you could apply them in a grid on a smartphone screen. Cool stuff. I'm glad to have a video out about it, and I hope you enjoy.
you seemed to have a lot of fun in this video :D
Surely this must be just part 1... the emoji isn't sent yet. You need to follow up withe actual transmission over Wi-Fi/cell towers, etc until the emoji lits up on the other person's screen.
It would be cool if you followed this with a episode about the transmission. Because pseudo noise encoding is mind blowing.
Did I said that I love you?
Can you do the PHYSICS part of sending and receiving text messages, and watching youtube
Imagine trying to explain ignoring a text message to a caveman.
"Well, I have this rock that I can input my thoughts by touching it with my finger, and then it sends those thoughts through the air to my friend who is several day's walk away, and he gets those thoughts on his rock. He then ignores it."
Several days walk away LOL
I think that cavemen might have developed written language from representative pictures, not the other way around. .. yes, dad, we are all Devo!
For the sake of your sanity and enlightenment, I am imparting unto you this playlist:
/playlist?list=PLZHUYcZse3nMLlJ0WoXixR4yCSilV4hud
“I told him, but he forgot.” Ignoring a text message is no different from that.
If you want to explain how you told your mate, that can go many ways, depending on whether you want to explain what you did, how you did it, how it works, how it is supposed to work, or why it doesn't.
Gavin and Burnie do have the best debates right?
Your website and videos are brilliant. I have just come upon them by accident today. Your enthusiasm, curiosity, and thirst for understanding are inspirational and infectious. You also display an excellent talent for explaining complex ideas through simpler analogies in a manner that focuses precisely on the idea you are explaining. I don't know your current career path (sorry, like I said I just discovered your channel today) but I think you should seriously consider working full time as an educator (if you aren't already). Outstanding work! (I'm a physics teacher by the way).
Ha! "CURRENTly being hit by lightning"
TheGreatMunky you can see yourself out now.
Always enjoy your conversations ... You always nailed it brilliantly ... Would request you to do some more videos on quantum physics ...
Thank you! I have been looking for a detailed explanation of how the touchscreens work for a long time! Physics girl is the best! :)
Love your video presentation. Thank you. Great explanation of a highly complex subject in an enjoyable, entertaining way.
You explain things in very simple language. Excellent work Dianna.
Fun fact the four 1's at the start of the line of bits (1111) at 4:13 tells the computer to take in the next 3 sets of bits (bytes). This is how it can tell where the command for one thing ends and the next one begins :D
I was expecting a much more general overview, but i like how specific it got. it's cool how into the electronics of the screen you got. Keep up the awesome work Physics Girl!
loved the use of anagrams. Made me understand much easier. Also the recapitation of the whole information offered in the video. This made the video much clearer and tightened any lose-ended facts. can't wait to see the next video!
I'm going to touch my phone now
- sent from my smartphone.
oh my gosh she replied 😱😱😱😵
you just made my day ❤
She didn't understand what you really meant
I just did......
@@MajedAY u r really lucky! 😇
I've always wondered how touch screens work but never really bothered to look it up. This is an awesome explanation.
anyone else get sent here by a homeless looking chap in 2021who runs a small youtube tech channel 🤨 good vid got a sub from me
I like your style Diana, very funny and informative. Thanks for the video!
I am an engineer, that's a pretty great way to explain how it works!! kudos!!
Thank you! With limited time, it's hard to get down into the details, but the most interesting part to me is how your finger can affect a capacitor enough to control a screen.
I to am an engineer , and this blew my mind how simple but complex it has been put together
When I first watched a video from this channel I was like: "For the first time in my life I got interested in physics", and this video should attract much other people like me.
This channel is so much better than school and I understand so much more with her than with my actual physics teacher.
Im Here, after Linus video, big fan of both... Happy physicing...
Great video, very good information for what it covered... but I feel I got 20% of the story! I was hoping you would actually continue on much further, with a (high level) explanation of how messaging software handles the outgoing text message and turns it into a network message, transported as a data packet over TCP/IP and wireless networks, touching on what network protocols are, and how phones connect to cell towers, receiving the message and displaying it on a screen made of a pixel matrix composed of LED components... I wanted to hear about the entire "life of a text message" from touch on the sending end to display on the receiving end. In any case, great work! I very much enjoy your videos and I feel you are doing a great service to us all, educating us about subjects we are not always familiar with. that's only reason I wish this video hadn't stopped where it did :)
From a Programmer's perspective, I'd like to add one thing... The touch screen contact point is translated into an X-Y coordinate, and the programmer uses it as a coordinate to determine what you touched (which button, image or anything else). Leave the complicated stuff to the hardware guy. For the programmer it's just a message signal with X and Y coordinates.
Cool animations .. and the best video of Physics girl till now !! In that tiny time this much stuff is happening !! Astonished !!!
Surprised you didn't mention the scale of calculation the phone does at all. From touching the screen to seeing the poop emoji about half a billion calculations took place. When the data hits the processor, it gets handed through several layers of code, interpreted by each into something understandable by the next, all carried out on a grid of switches powered by rusting metal. It's freaking incredible.
There's a LOT more I'd like to get in to. I used to program and I'd love to talk about code, but I haven't figured out the right way to tie it in to physics. Suggestions welcome!
could you maybe talk about how much energy from a battery is used in doing something like calculating 2*2? it would be interesting to see how the energy used to do a calculation through programming compares to the energy a human uses to do the same.
another way is to talk about a simple adder circuit and show how to do math using simple on and off switches with current going through them.
i look forward to seeing your future vids :)
Physics Girl Maybe a mini series about how physics uses computers and particularly really smart code to do physics? Talk about something like the LHC, or computer simulations. I think especially computer simulations would be eye-catching at least. That way you get to talk about both physics and the code that we use to figure out what the heck happened in that little big bang we just made.
nope, nowhere near half a billion calculations to do that. that would mean a 1ghz smartphone would take half a second to display the emoji after you requested it, and it's obviously not nearly as long. in fact, if correct for the touchscreen and screen input delay, the delay would be in the order of microseconds.
more like 50 thousand calculations. and that's low level binary gate (true or false) operations.
How about explaining the amazing physics behind RAM row hammering works. You get into electromagnetism, processor instructions, and more!
Physics Girl Dianna, THANK YOU for making all of your videos. I am 74 years old and have had life-long struggle to understand math and physics.. You make it easy for me to understand complex subjects. I hope that your videos to inspire the new generations of kids
"...or if you're currently being struck by lightning."
Physics Girl's pun game is strong! XD
Yeaaahhh... I'm a electronics technician and I have to say that this is a reeeeally good way to describe all the electronics inside the phone... thumbs up =]
My phone does nothing compared of what my heart does when a i see that you upload a video
never
seen this way of explaining physics.. great work
that's poop? I've been using it to ask people to go get me some ice cream. poop should have stink lines.
haha lol
I honestly don't know if its poop or ice cream, I didn't know emojis were so confusing lol
But what if I want stinky ice cream?
😂
I think I heard that it is Ice cream but everyone thinks it is poop...
Thank you for this video I always wondered how touch screen works
I was looking through recommended and this came up "uploaded 24 seconds ago" I felt obligated to comment
It's a very good channel.
I feel like Physics Girl just put together the pieces and came to the understanding/realization that there is no imaginary hardware/software boundary, and it's all always just been electrical high/low pulses through logic blocks. Computer Engineering is awesome, highly recommend to anyone.
Nice Video. And thanks for Thorn I am going to use it when I need a new variable in a theory. Some already run out of good letters for physical concepts (yes I am looking at you charm and strange quark)
It's a great letter. It's too bad English lost it.
It didn't…quite. In shop or pub names like "Ye Old Curiosity Shop" that's not actually a "Y" it's "Þ" and "Þe" is pronounced exactly the same as "the" ;-)
I am so glad I came across your channel, interesting, fun and tons of personality. Definitely worth subscribing.
Who all came from linus's video
I did! 😊
Same
@@LovecraftianGodsKiller I watched this video once many times ago but is watching it again for a reminder.
Lol same
☝
I always wondered how touchscreens know the difference between a finger from another object. Ever try using a pen cap? It's all in the charge. Makes you appreciate the genius engineers and scientists that create these wonders. Thank you Physics Girl.
Dear Diana, you could have done better on explaining how the signal gets interpreted. For example with something like this: The electrical signals from your finger are interpreted in such a way that the position where you touch is determined. That gets sent to the phone's main processor which also knows which emoji is currently displayed at the position where you touched the screen. And so on. Just don't skip so much of the general computer knowledge, but rather include it in your explanations! I know it's just software and from the standpoint of a physicist, this is boring, but hey, most of the stuff that goes on in our phones *is* software, interpreting the phsyics around it! (i.e. when you find a Pokémon at a certain location).
I'm a comp-sci major and I had to take a certain amount of physics to get my degree. Just enough to understand circuits, really. I couldn't believe it later when I connected that up to typing on my keyboard and how operating systems work. Didn't know the stuff about touch screens, though, thanks for that.
im here because of Linus tech tips
I really hope that you're feeling better soon!!! Every single one of your videos (except for the updates on your long-Covid condition) fill me with joy. You totally rock, and I tell way more people about your channel than who care to listen. :D
Anyone after Linus's video?
Excellent video. Physics is so much fun to learn and play with.
0:22 "It's like the *future*."
That was hilarious!
Hi Physics Girl! Great video on the physics part! Although I think you're mixing the whole process between the touch and the poop emoji... The touch-screen signals the operating system the position of the finger's touch, not the code that uniquely identifies the poop emoji. That way the operating system knows where the user touches the screen, and in your case, in the keyboard with the poop emoji, that will communicate with the messages app the poop emoji which has that unicode to uniquely identify it and write it on the text field.
Thanks Linus :) This is great!
For me, very fascinating is the sending process. The fact that whatever I do on the internet, hundreds or even millions of packets are sent each individually, each "find" their path to destination, and then arrange perfectly to form a meaningful thing. Just to send this comment, countless packets had to be sent over the sea. It always makes me appreciate just how awesome internet is when I think of it. And there's so much behind it, regarding all the protocols and stuff.
Awesome video Physics Girl 👍🏻
Dianna
I've been studying computer engineering for 2 years now and the video is so full of oversimplifications and half truths that it makes me rethink whether I should stay subscribed.
Linus tech tips gave u a shoutout!
I bought my first CP/M computer in 1982, my first Dos computer in 1985, and my first Windows based computer in 1988 (Windows 286). My present smart phone has (much, much) greater computing power and storage capacity then each of these three desk tops. Modern smart phones are wonders of engineering.
0:09 "thoughtful"
This was from 2016? I've been looking for an explanation for this forever! Thank you!
Here from Linus tech tips
Great job keeping such a complex subject very approachable. Nice touch with the silly side notes.
This video should be called "How does your phone *sense* a 💩?"
Thanks, Dianna, for your enthusiasm for exploring the world around :), that's sooo great inspiration for me (physics teacher) :) ... THX :)
What does an electronic engineer eat for breakfast?
Honey ohms
I don't get it.
David Wührer honeycombs like the cereal
Ohms like the unit for resistance in a circuit
Thank you Ill be here all week
PapaKay I didn't know there was a cereal of named honeycomb. ΩI.
That was SO interesting! You're truly amazing!
awesome work here. can we get one on SMS and other texts and stuff?
how cell towers work etc
The most fascinating thing to me about cell towers is the structural engineering that goes into the cell network, and all the protocols used to send text vs. relay calls, and all this 💩 I know almost nothing about. So maybe it's time to make that video and learn.
Thank you for your videos. They are exellent. When you get a chance, please explain the physics of computer chips. They are in everything but there are very few layman explanations of how they really work.
Not to mention the stuff that really makes your smartphone go.... software!
Correct. Not to mention. Shhh.
Don't forget about scattering theory and things like the orders of a perturbation series for the S-matrix. Can't have cell phones without that stuff.
sorry hardware is better.
hardware is always first inside my heart.
-the local nerd
The touch itself turns into an estimated pixel coordinate, which then is used to figure out which emoji you picked. The pixel coordinate relative to your phones resolution allows the apps and software on your phone to know where you touched.
Do you know why touchscreens don't work as well with cold fingers?
the conductivity decreases with decrease in temperature
Actually something cooler is a better conductor. The reason is more biological. To conduct you need oils and water over you skin. When it's cold the formation of the pores and dry skin makes your skin less conductive.
i think even without oil our body can conduct.
Do you have plans to do the sofa science video thing with Physics Girl? you've already done one with Brain Craft
AJD is right, only metals conduct better when they get colder. Semiconductors and nonmetals *decrease* in conductivity with decreasing temperature, the exact opposite of metal. However that's not the reason, touch screens are capacitive not resistive, you don't even need to physically touch the screen for it to work. Additionally, dry skin is perfectly fine, you don't need oils or water on your skin for the screen to work. Your skin is alive and thus full of water. The reason it may not work is if there is a thick layer of dead skin on your fingers, dead skin doesn't contain any water.
I love your happiness and enthusiasm, Dianna!
'CURRENTLY being hit by lightning' ba dum tissss 😂
You're more enthusiastic than normal. Keep it up! :D
Now i know what the dots on my screen are (the ones spaced 5mm apart). I can see them in bright sunlight at specific angles.
Cool video, always enjoy watching this channel. Great job Dianna
Who is here by linus seb.?
Meeeee
Great video! I have a degree in computer science and really loved how you tried to explain the essentials of how touch screens (or input devices in general) work and how the computer transforms the electric signals into well-known data representations.
I'm really passionate about science and about my job, and I find it often frustating how my job is a complete mistery to 99,99% of humanity. Thanks for making an effort :)
Ps. If you would like to continue with some computer science stuff related to physics, I think there is another very interesting subject: How to do deep space data transfers, taking the New Horizons as example.
Phi isn't a Roman alphabet letter. It's a Greek one.
great show perfect for me and my daughters! thanks for going on SpaceTime so I could find out about you.
At an afterparty of a rave (drugs were involved) we found out that bananas work as well. It was hilarious! 😹
my education covered IT and some electrical stuff but no physics, this video filled that gap a bit.
Guitar Lesson
im talking highschool level here, not university stuff.
Linus sent me
Diana, your so freaking 🔥 really you went from physics to computer science. Really think you could help me with something I'm trying to make.
Okay PhysicsGirl.... ummmm I noticed that you Recorded your Opening Frame and Closing Frame at about the same time..... I'm looking at the SUN light in the background.. :) ... I'm also trying to figure out how long it took you to record this video... I see that the sunlight is shining on your Table.. at the start.. and with all the CUTS and Take 2's.... the sun has moved to behind you, hmmmm I'm guessing it took you 2.5 hours (or more) to complete the video... The sun's light on the corner of the house.. the Table.... etc... see for yourself!!.. :D OBERSERVATION is the KeyStone to Revelation.. :D (and no, that's not a biblical reference)
Impressive! I think you're about right. Maybe 2 hours?
LOL.. well thanks for responding... what I meant to say is, GREAT VIDEO!!.. You explained the way the Touch Screen works!! with great diagrams!!.. THANK YOU! :) ... you really are a great presence here with all that you share with us.. I wish all the best to you and for you. Keep up the great work... you'd be surprised at the size of the SILENT Majority that don't give you the feedback you deserve.. but THEY ARE ALL THERE.. ..:) Peace always....
Felt like watching the whole video again, with attention to sunlight and all those details!
@@ptyptypty3 Finally saw one proper comment ever on UA-cam... Very nice observation...
BTW I took 15min and 10 replays to see the things you saw...
@@gayatrisavarkar8196 true
3:58 Very, _very_ simplified. Well, it has to be, I suppose. However... 4:14 This is the UTF-8 encoding of that character. UTF-8 is used for storage and interchange, but not generally for internal representation; for that, it's much more likely to use something like UTF-16 or UCS-4. Also, all of these encodings are part of Unicode, and it's not even clear yet that you're touching a button (what's a button, anyway? the chip has no concept of that), so you're getting a little ahead of things. In reality, the chip is most likely figuring out the coordinates of where you're touching. This then gets sent to the operating system (still simplified), which then notifies the app that is currently displayed. The app figures out what touchable widget is at those coordinates, finds out it's the button for "insert the U+1F4A9* character", then adds that character to the string in the text box. Later on, assuming whatever protocol the app is using requires UTF-8 encoding, it converts the whole string to UTF-8, so that U+1F4A9 gets converted to the representation shown at 4:14.
* "U+####" is standard human-readable notation for Unicode code points, with the value in hexadecimal.
4:31 Hehe. "Roman alphabet", you say, as it clearly shows a Greek letter. :-D A very appropriate letter, though.
OMG PLEASE NOTICE ME I LOVE YOU SO MUCH
You helped me so much I loved think you are AMAZING!
AND I always wondered what made the phone do something when you touch it THANKS!!!
Jabberwocky IKR me too
The restraining order is in the [registered] mail... :-/
#CreepyOrWAT?
I love the editing of this video.
What is 🐡 in binary?
This is an excellent video. Thank you Diana.
It would take like a two-three hour video to explain briefly how your phone sends an emoji so yeah, you can only put so many info in 6 minutes.
amazing job!! explaining science in a fun way.
came here from linus' new vid
Watching ur videos makes me wanna learn more
3:07 That means pG (Phisics Girl IMO)
I have literally been wondering this forever!!!! This was amazing & super interesting!!!!!!!
"or you are currently being struck by lightning"
Thanks for the video. I was wondering about that a couple months ago.
Who else came here after msg from Linus 😂
Very charmingly explained.
And mom though I didn't learn anything by sitting at the computer all day.
Awesome explanation
I can listen to you talk all day. I love smart women💜💓💜💓💜
You love smart women but do you respect smart women? Probably not as much as you think and I'll tell you why. When I was in college, I knew the material pretty well because I would study for 5 to 10 hours per day, 6 days per week. That's a little less than 1,000 hours per semester, and I made a lot of sacrifices to put in those hours with my class schedule, commuting, and work and so on. Because I was typically ahead in the class, I would frequently explain the material to my classmates. One of them apparently had a crush on me. I didn't know this at the time. He never told me. Never asked me out. Never really struck up a conversation with me. But what he would do is ask me to explain something, and I would obliged to help a fellow classmate out, but while I was standing there using my time to explain something to him that I had spent hours of my life that I couldn't get back learning, and time explaining something to him that I could have spent making my own life easier, he wasn't really listening and learning but standing there spacing out and getting off in his head. He sexualized me and trivialized something I had put a lot of work into and wasted my time for his semi-sexual pleasure. No thanks. I'll take the guy who actually has a little more respect for me and my time.
Agh this is so insanely cool!!! I love your videos so much!!!
WOW... so , Diana...where in the world did you learn all this at such a young age..??
Amazing and a great video.
I have another question?..
How do I get my motorcycle gloves, or any gloves, to be touch screen sensitive or work with my phones ? I've read alot about liquid products, graphite, some types of thread to see onto your gloves..etc..
I do have some touchscreen gloves and my thin nitrile gloves also work. ??? Why ..don't know.🤔🤔..but I have a pair of heated gloves that I want to use with my phones.. so, since you seem to be the expert on this 🤙👍👍👍I'd ask..😁thanks for any information you can give me.
Looking forward to your other videos.👍🤟
Ummm… The only physics mentioned explains the working of the screen. The rest were all just a pretensious cluster of electrical terms which don't explain any physical phenomenon. This really should just be called how a capacitive touch sensor works
gosh..I am so happy physicsing....so so so very happy!
(Another excellent vid, by the way. Thanks for all your excellent and dedicated work!)
I wish you were my teacher
Yea like you could focus on learning with her around
On some phones you can actually see the capacitive touch grid of your screen. Just hold it so that it reflects the sun (while not caring about whether you see what's displayed on the screen, or even with the screen being off), and you will see a regular pattern of dots. That's at least part of the capacitive touch grid. I was able to see this on a Sony phone as well as on a Huawei phone from like 5 years ago.
Linus sent me.