Commercial Smartwatch VS DIY Heart Rate Monitor

[@Nono-hk3is]

Hmm, according to this graph, you died several times during your run.

[@greatscottlab]

Well, not quite.

[@ishigamiyu1991]

xD

[@AkashMishra23]

@@greatscottlab Yet

[@kaanyt5726]

Ya lol

[@takix2007]

He was only mostly dead. There's a big difference between mostly dead and all dead.

[@ItsJustMeMusic]

when the microcontroller on the sensor is more powerful than the main microcontroller.

[@stefansolvang8943]

The best with the Withings is that it is a watch with smart functions and not a smart watch. Absolutely love mine.

[@oliverbevan2575]

I mean that’s basically it’s only selling point

[@bokkenka]

"Build a small, DIY, heartrate monitor...." "Honey, I'm going for a jog... Have you seen the wheelbarrow?"

[@derisis13]

We live in the age of Arduino, where every sensor gets one microcontroller... Couldn't that STM32 handle an OLED display and logging? And why use an SD card? The atmega328p has 1k EEPROM, and even some STM32 have it in similar size. I know this is just a prototype and for testing, but I really, really despite the wastefulness of the „Arduino age” in general. (Here I have to mention that I don't hate anyone for doing this, I hate the trend that is going on.) And it's especially sad, because this trend reduces the need for clever design choices, something I really enjoy to see.

[@nout4269]

Absolutely agree, and the same trend is happenning in computer programming. When cheap components and large amounts of computing power are available at little cost, people stop caring about efficiency and performance, and just start piling levels of abstraction to fix their problems. Although to be fair, Scott probably doesn't have the time to develop a custom PCB and µC specific program that goes with it for each project.

[@MrMatapatapa]

@@nout4269 the new limitation is human time, not computer power. Why stress about saltwater usage in the middle of the ocean?

[@nonchip]

i kept thinking the same. there you got that cpu that's probably 10 times more powerful than your arduino, in a nice case that looks like it has some space left over for display,battery and card slot if you play a bit of tetris and desolder that connector, and instead let's just add another cpu, custom case, and loads of hotglue? :P

[@bahn5ee]

Hi, I though the same, the STM32 can handle a lot with 72mhz ,128kb and 48 pins. I guess they used with sensor because it have ADC and cost £4.

[@resneptacle]

How do you plan on easily getting the data off? Through the serial port with custom written software on both ends thst has to be updated for new systems and be somehow cross-platform compatible for a "proper" setup... It's easier to just use a small SD Card that really doesn't cost much nowadays

[@mazza411]

The heart rate sticking to ~161 will be the sensor detecting your running cadence. It's a common issue with wrist based heart rate measurements. I opt for a chest mounted HRM for more accurate data. Would be great to see a video making your own chest HRM as they measure differently.

[@kwakeham]

Having worked on optical heart rate technology I can tell you a few things. For sports where movement happens the signal is not close to stable, but you first need to start with an optimized mechanical package with optimized brightness and spacing and a large photosite. Most of these early and cheap "all in one" led / sensor / AFE can't work on wrists or arms well due to the lower signal and are now relegated to the "finger HRM sensor" pile, and low end cheap "smart" watches where you can fight a little to get them to work while not moving. The movement generally means the signal gets lost, completely -- that's what you're seeing. The better ones use algorithms that take your history and accel vibration to estimate your HRM. They've gotten really good at guessing what your HRM is..... not directly measuring. While still filtered a HRM chest strap only uses algorithims to clean up noise and variation -- that's closer to a real reference, not another guestimator.

[@ersmilata6014]

can you start a youtube channel on this 🥺

[@vijayendirangiridharan6113]

Imagine running on the streets with a box ox random Arduino components strapped to our hand!!😂😂😂nice project tho!...

[@scrambledmandible]

Pipboy!

[@negron_james]

@@scrambledmandible whot

[@flyinglack]

@@negron_james a fallout reference.

[@Zenefor]

Thanks, now I can monitor my bodies in the basement in case one is faking dead.

[@deadbird99]

0:18 "this is a damn good smartwatch" 0:36 "overtime, the heart rate detection became sluggish and unreliable" 😂 Just teasing, I really enjoyed this one, great job!!

[@greatscottlab]

Haha well, no product is perfect😉

[@snailforsale]

Lmao

[@givinghawk]

Wait... this comment says 4 weeks ago and this is uiploaded 12 mins ago

[@gajananddave3385]

@@greatscottlab you are absolutely right.😊

[@BESTvsWORST-vx2dg]

how the heck is this 4 weeks?? is Great Scott doing sorcery??

[@andrewhamop6665]

I really like the little video segments you do before the project, I think I speak for a lot of people when I say please keep doing them!

[@OeStErA1EsCo]

This is the first Fitbit I have used. It has some new features kzbin.infoUgkxbkrje8Y7BaqRkAjimw-55ajvVo7RbcIp and I like the information that it gives me.I think the phone app could be designed to be a bit more accommodating, as it can be confusing to use. The rubber band is comfortable, and normally I do not like rubber bands for my watches, but this is comfortable.I am looking forward to seeing if this helps me stay accountable in my fitness endeavors!My only gripe is the box was very damaged when it arrived, however, the tracker is performing perfectly!

[@kabelloseskabel7029]

4:14 A tutorial on Kalman-Filters would be great and excelent for this purpose.

[@rayztech7384]

Yes i agree but i think extended kalman filter would work better

[@rickseiden1]

"Over time the heart rate detection became a bit sluggish and unreliable." Planned obsolescence

[@anno5936]

Detection or Heart ?

[@samuelschwager]

@@anno5936 Both ;)

[@sayinpower3]

I should hope not. I'm a software/electronics engineer and the day my job tells me to program something to become unusable over time is the day I quit my job and post what they tried to do all over the internet. I should hope this practice doesn't exist. I wonder if there are any real world examples out there of where a company got caught doing this practice?

[@varunsreedharan5347]

@@sayinpower3 apple

[@ErRanaPrince]

Your project videos are great bcoz of eazyness to understand that's why i always watch your videos coz i always something new for learning, keep working and go higher I have a suggestion for you, you should make videos about working principle of components in detail, we need that,

[@pcarlson1979]

OMG. I’ve never seen you. Not what I was expecting. Gotta have the best voice on KZbin!

[@FutureTricking]

Hey Scott can you do a video on pulse oximeters? How do they work and maybe a DIY I use them daily as I am a nurse and would love to know how they function!

[@SidneyCritic]

That's pretty much what I discovered when I was testing my cheap ebay fitness watch, ie, the sensor contact is very important for accuracy. I went back to the old style chest ones, with water to ensure contact, and it's 100% reliable.

[@clonkex]

Ayyy you said "hit the notification bell" instead of "hitting"! Sounds so much better!

[@-Graham]

I used to test those watches before Nokia bought the company and they were still made by Withings. They are actually quite good, if very simplistic, which isn't a bad thing. The analogue-esque step counter was a nice touch

[@midnight_perdita]

I like that you are active these days . Keep going ❤️

[@user255]

In case of very high demand for integration, commercial is pretty much always the winner.

[@santananawinds]

60 bpm, greatscott is a professional athlete!

[@breadsticks98]

Greatscott you are my favourite youtuber videos always detailed

[@tommyle628]

Just saying, in order to get a correct and reliable heart rate data you will need 6 pairs of LED and photodetector. Great analysis my friend, I hope your next HR project will be a ECG based Heart Rate Strap. That technology is even more accurate.

[@electronic7979]

Very good project. I liked it

[@DoctorX17]

I'd bet you could make a slimmer package overall if you could get the raw components for the HR sensor and designed a custom PCB, maybe something approaching the regular watch form factor

[@real4487]

When Great Scott goes on Airport It's a bomb Scott : trust me it's my heart rate monitor

[@taintonhutton8072]

Love your videos @greatscott, but this isn’t much of a diy since most of your final used heartrate monitor is a purchased package?

[@geetanshgautam]

I'm liking this new upload schedule

[@rayztech7384]

Hi Scott i have been following you for years and i really like your videos ( one of your patreons 😉 ) and you have inspired me to create my own videos. Its not as good as yours but they will be over time. Thank you very much for all your knowledge and work. 😎

[@klosskopfder1.762]

If you wouldn't live in the age of arduino, you could have used the pure sensor, display and a uC on a custom pcb to make the project way cheaper, smaller and provide a way higher value gain, writing your own code. All these modules may be fine for a first test, but a finished project schould be more polished.

[@fidodidotech2789]

I come here for the intro hehe, love it

[@craigbasher]

Wow what great intro project! I was wondering what you think about making a compact smartwatch design using an esp32, heart rate monitor, squarish oled display, tactile buttons, small lipo battery and 3d printed enclosure? The esp32 is used to connect either a website/app through either bluetooth or wifi. Thats the kind of project id like to make once i have some free time. Though i still need to buy a 3d printer and practice some designs.

[@MitsuZer0G]

4:01 so you set your FTDI breakout to 3.3 volts but set "5 V and 16 MHz" for the processor? 🤔

[@greatscottlab]

Yes

[@MitsuZer0G]

@@greatscottlab Why? 🤔

[@CountDecko]

​@@MitsuZer0Giirc the tx and rx pins work on 3.3 even tho the arduino is at 5. Could be mistaken tho.

[@hardikminocha3149]

Because the peripherals, in this case, are supposed to work on 3.3V. The MAX3010x family works on 3v3 level, and the FTDI or commonly known as TTL converter works on 3v3 too. This is not due to the requirement of the controller, but the logic levels used by the computer.

[@BESTvsWORST-vx2dg]

sir, Try to create an *Arduino oscilloscope* .. Thank You!!!!

[@JohnLee-bf2ux]

Hi Great Scott, please make a video of necessary electric work safety equipment and practices which includes the gloves you used during your spot welder videos and the ones used while working on home live line equipments, safety glasses, footwear, ear plugs, face masks to protect from glass dust, spray and abrasive powders etc with safety practices such as stripping high amperage cables without loosing strands, fire safety, explosion safety, power line safety etc. Also provide shopping links so you get some commission. This would be one of the best series of your videos as it’s absolutely essential to practice safe engineering. Thank you JP.

[@Krmpfpks]

Best DIY projects are the ones that just prove you do not need them. I built countless of them.

[@vaioskaliakoudas6388]

This could be a perfect idea for a new DIY or Buy episode

[@alainkovacs2007]

I absolutely love your channel and I have been following you for a very long time now. I like the projects you do and I can see that you have developed a lot since you began, however, probably the only one thing that you did not develop since beginning is correct, proper soldering. I cringe every time I see you solder something.

[@dannydechesseo1322]

You should make a diy laser thermometer to check someone’s temp from a distances away

[@abyssunderground]

This isn't an accurate way to measure someones temperature because it only measures the surface of the skin. It should be highly discouraged as you could put yourself or others at risk by using any data you get from this method.

[@kingi7607]

Comment of the year.

[@moki2093]

Just attach a normal laser thermometer to a long stick wtf

[@dannydechesseo1322]

abyssunderground I was recommending it as more of a learning project and not for actually real world use

[@dozog]

@@abyssunderground Don't all of the new contactless thermometers work on the exact same principle? And hospitals use them all the time now with the virus going around.

[@onelivingsoul2962]

So far from what i understand,firm contact,Multi emitters of Green Led and Photo diodes (3 heart rate data across 3 different points) and instead of calculating in real time,use the error correction algorithm efficiently. Use of Historical sample data for future predictions along with help from accelerometer to subtract noise due running. There are many more. You have to invest quite a lot into this to effectively make this sensor into what we call "Medical Grade Monitor"

[@GuillermoAlfonsoMorales]

One of the best projects you've done. Love it. 👍

[@greatscottlab]

Thanks :-)

[@SamWestby]

Research on the accuracy of different photoplethysmography devices (fitbit, apple watch, etc. ) is all over the place. Some studies say the tested devices are 99% accurate, others say they're 70% accurate. I think this method of measuring heart rate is just inacurate.

[@cavemaneca]

This method is commonly used in medical settings to get continuous heart rate and blood oxygenation monitoring. The major difference though is hospitals use a disposable, detachable sensor element hooked up to a powerful machine. It's not accurate for diagnosing medical conditions, but it is very useful to detect if someone's heart is still beating at a safe rate and fresh blood is reaching their extremities.

[@zaydabbas1609]

I have used that sensor, you can use a lens on it. Weird that the smd parts stuck out higher though.

[@jaydeepSE]

It's an open-source smart watch and the software is customizable I think it will l be a great video

[@zaprodk]

You need to remove the small piece of kapton tape from the front of the sensor to make it perform correctly. It's sensitivity is less than it should be with the tape in place.

[@acy1335]

Legends say this comment is early Great Scott will reply to it.

[@greatscottlab]

If you got a good question, I usually reply.

[@diezeeshoodie]

@@greatscottlab B-but it wasn't a question and you still replied. UwU

[@acy1335]

@@diezeeshoodie yea lol but still good got a reply :)

[@Alexander-ri1bp]

Great video as always :-) I would like to say that MAXIM30102 is newer and better then MAXIM30100. This sensor is also very external light sensitive. In these corona times, heartbeat AND oxygen saturation in the blood in in greater interest than just heart beats. And MAX30102 can easy do that :)

[@detectivegenius9744]

I'm watching your video since you had 100k subs😊 Now you have 1.32M *Congratulation*

[@greatscottlab]

Thanks :-)

[@detectivegenius9744]

@@greatscottlab Welcome 😊

[@miaowzerz]

Scott do u have any ideas for 3d prints quarantine is very boring

[@DIYPINOY]

Another awesome video great scott 😊

[@ayeshaparvin8906]

Sir, can you build a budget 3d printer Waiting for a positive reply.....

No capacitors by the voltage regulator?

[@murugesanr1691]

Hi Scott, reason for diy sensor is placed in the wrong place of the hand ,it should be above or beneath wrist position..

[@moathnaji2763]

Hi friend I like all your tutorials and your channel one of my favorites… Could you make step up USB cable dc-dc booster 5v to 12v with 1 amp or more. Please?

[@CorvanEssen]

Could it be when it said 160 bpm it was close to your steps per minute? I've read this sometimes happens even on commercial sensors.

[@snailforsale]

Awww that’s nice!! Definitely gonna try it ☺️☺️ plus I love your aesthetic! 💗💕

[@AS-ug2vq]

DIY or Buy: Laser Diameter Guage, which can be used for filament diameter logging for quality purpose.

[@hamzakhan-mo4bv]

Really enjoying your videos.

[@garzonimpleks]

Never knew Nokia made smartwatches

[@hiteshkumarsingha5042]

But u skipped the max30100 part. Is the library of the max30100 lacking something..I mean whether it needs an algorithm change.. Actually i m working on making a pulse oximeter during this covid time.And that too using an arduino.. But every where the video lacks description or proper explaining.. I thought i might get some imfo here..but you too didnot used that sensor.. I tried to make one using red led photo diode and an ir sensor .but it didnot work.. so if u could give me any suggestions..

[@Casshern1456]

Why couldn’t you appreciate the amount of hours he took to make one vido, keep it up for engineering. I’m a network architect so data analytics so great. Thank you. One day we’ll work together maybe.

[@walidebdelli1046]

Always enjoying your video..

[@aidanhiggs5516]

Awesome video. If possible, please make more biomedical-like electronic videos :)

[@489michael]

Can you make a video about your automated greenhouse? Everything from construction of green hoyse to electronic systems.

[@Twometer]

I would really like to know what filament you are using, your 3d prints just look so cool :D

[@RadOo]

I like that introduction, is this going to be in the future? 😁

[@Tho_Fox]

Thx for the Video! The black filament for the 3D printed housing looks really nice. Could you share what filament you are using and if you like it/can recommend it?

[@greatscottlab]

Prusament Galaxy Black. Best PLA filament I ever used.

[@無融式開關]

GOOD PROJECT!! I love it. @

[@h1tbox374]

Just an idea, but I think it would be cool to try a DIY or buy with a Ring style video doorbell using an ESP32

[@petergamma741]

Great video. It demonstrates that it is possible to build your do it yourself heart rate watch. Unfortunately, only one heart rate sensor is very inaccurate. There are now very accurate heart rate watches available like the Apple watch or the Huawei watch 3 GT pro. Unfortunately, they do not allow easy acess to sensor data. A do it yourself watch with more sensors would be highly desirable. We did search a multi sensor heart rate board, but we could not find one. Could you find somewhere a multi sensor heart rate board, to obtain a more accurate heart rate watch?

[@MCsCreations]

Pretty interesting project, dude! Really well done! 😃 Stay safe there! 🖖😊

[@creazychannel]

*0:38* : NOKIA watch Only legends will notice

[@thefirstsin]

Oh damn

[@parveshkhatri1027]

Nokia wearables part is now sold to withings

[@chromatiCityGame]

@@parveshkhatri1027 after it was first bought from Withings :)

[@gamithawijesinghe621]

Greatscott could you make a video on budget cnc machines?

[@adituta8660]

Awesome! Did you know that sensor was inventat by a Romanian phiscist called Cristian Presură! I am proud of being Romanian!

[@McCarthyisms]

Hey, I'm busy building a uvc disinfection box (hoping it works against corona). Video idea? Build the thing and register it effectiveness.

[@McCarthyisms]

@Против Глобал yeah I know about the dangers that why I built it in a aluminum trolley, with all the seams taped off with aluminum tape (hoping for some reflection to increase efficiency). I also made sure that it's lockable, everyone in the house knows about it. And it's in a room with a lock with a big sign that says: don't go in, uvc disinfection lights.

[@McCarthyisms]

@@maxhouseman3129 Yeah I read some about the effectiveness against SARS, hoping that it has the same effect. Btw, yeah shining on your body is a pretty bad idea. (Prefer to not die of skin/eye cancer or go blind)

[@unsubscribefromthischannel712]

Whoever is reading this: 💖 May your loved ones live for a long time!

[@UNITYMusics]

That's great But Can We Make Camera With That Heart Rate Sensor

[@chethanr7670]

The space would have been reduced if you create own PCB and use microcontroller IC and burn the boot loader to it

[@abdulazizalsugair3163]

Great video, as always. I am not sure how you feel about Raspberry Pi, but I think it lends it self better for this type of project.

[@dozog]

Bit of overkill, don't you think? What do you think the advantage of PI is in this simple application?

[@nichtbekannt8442]

Electronic Basics about Flip-Flops would be great

[@markojojic6223]

Can you make a follow-up where you simply store the heart rate as a single character in a .bin file.

[@edycole5543]

very inspiring for the maker, maybe with esp32, broadcast to network, can real-time monitoring for covid 19, to make alarm and graphic analysis heart rate from far away, thanks scott

[@kedarprabhudessai]

Hey nice video... Btw you got Nokia watch?

[@DaPunchyDudeYT]

Also using the OG Withings (before it was bought by Nokia!) Steel HR!

[@alichank]

Hi Scott. I wanted to make a powerfull sound amplifier, but i couldn't find any good tutorial. Would you please make one? If you do this before, please give me link to your video about sound amplifier.

[@sumantacm1]

Hey Scott, can you please make a video on wireless audio streaming to multiple speakers ... Maybe with Bluetooth or wifi to keep the audio quality intact... Thanks

[@RubenKelevra]

My Amazefit Pace is still running strong 😙🎶 Quite an impressive smartwatch - if you're in the market for a new one :)

[@bctechmalayalam5391]

What about your quarantine life?

[@Albanez39]

Hey Scott...I've had an idea for some time now: Making a watch that zaps you with electricity at a set time. I've always had trouble waking up in the morning, and I think this could really be the solution. My plan is to take one of those zapping/pranking pens (high voltage, low amp charge) and connecting it to a simple wrist watch capable of alarm. Problem is I'm just a beginner with electrical projects and don't know where to start. I hope you consider this as one of your next video. There is one such commercial product called Pavlov aimed not only at waking up, but to all sorts of activities someone would want to stop doing. But it's incredibly expensive and has useless features (bluetooth connection and smartphone operation) I don't need.

[@SAHILKHAN-lu8oq]

Watch the video of ElectroBOOM on this topic 😅

[@steffen.troester]

Wie kommt's dass du nicht PlatformIO für Arduino Projekte nutzt? Find es vom tooling her deutlich praktischer :)

[@davianjonson4688]

Have you planned to try the atmega328pb version of board. I think it offers a extra bit of features that may useful

[@jwchavez]

Great video Scott, I got a doubt: How do some manufacturers manage to calculate (because as far as I know, they don't sense) blood pressure? Thanks a lot buddy, regards from México!

[@OddJobEntertainment]

I'm a medical assistant and measuring blood pressure is my bread and butter. The short answer is they don't do a good job. But to explain that further, let me explain how it is done manually, which is still the most accurate. The cuff is inflated to a number higher than your blood pressure and with the stethoscope we listen for a heart beat. Once it drops to the right pressure, we can hear your heart beat in your arm. We record that number as the systolic pressure (top number). As the pressure continues to drop we eventually stop hearing your heartbeat. Once we no longer hear it, we record that pressure as the diastolic pressure (bottom number). Automated cuffs try to do the same task of 'listening' with pressure sensors and airflow sensors. They do a reasonably good job but it is still not as trustworthy as a manual reading. Watches try to do it by using the same LEDs we saw in this video to estimate the pressure based on pulse transit time. It's a secondary observation at best where it tries to correlate the time it takes for a pressure wave to travel through your wrist with you blood pressure. It needs quite a bit of work still.

[@TheHomerepo]

Was the intro slower in the past videos or have I stopped drinking caffeine?

[@ujwalgagneja7990]

Hey great Scott make video on how to make deauther watch to deauth and to control home appliances using it and blynk. Biggest fan, daily viewer, Love from india punjab.

[@Abhidoesfirestuff]

Just 5 minutes past upload,damn can't believe this

[@patrao5965]

Nice project !! 🤓 What if I wanted to store the data on mobile app through bluetooth instead of SD card

[@joworge]

I'm far from being an expert, but probably you can do this with an ESP32

[@Toropse]

Gutes Video! Nach sowas hab ich lange gesucht!! Offtopic: Warum übermalst du mit dem Fineliner ständig deine eigene Schrift nach? Das triggert irgendwie jedes Mal, weil das es danach schlimmer aussieht als vorher :D

[@lemonglataitor2123]

Finally, now we know when you are nervous!