Check Your Heart Condition Under 10$ || DIY Homemade ECG Machine using AD8232

[@laycookie-f6i]

11:28 It is not a bug that is just it is just done by your audio drivers because in order to produce audio you need the wave to jump up and down, so it is in fact done by your laptop and not the software if anyone is wondering. Also unplugging a laptop from the wall does noting because laptop has its own battery and in case it will start drawing more power than it needs to the fuse inside of a laptop will burn faster than the electricity will be able to reach you.

[@mannys9130]

Unplugging the charger isn't for safety reasons; it's for noise elimination. Switch mode power supplies are very electrically noisy and the charger WILL put a ton of noise into the ECG signal.

[@laycookie-f6i]

@@mannys9130 Sorry posted the comment long time ago so I'm not sure but I think I wrote about it because he said that you should unplug your laptop for a safety reason. Also clever thinking but as far as I'm aware the power supply sends electricity to the battery which then sends it to the ecg, and in this over simplified circuit the battery is most likely going to filter all the noise out. P.S. I'm not an electrical engineer so I might be completely wrong.

[@wawan_ikhwan]

​@@laycookie-f6isafety reason is also a valid point, i have my laptop that has electric shock when plugged in

[@pierpa_76pierpaolo]

How many mV and mA must an ECG electrode, electro-stimulator, etc. have? I tried searching for something and saw 1mV (but they don't specify mA, they are obviously very low, but I would like to know the exact value. So if we have 1mV we get a maximum of 1mA. I ask this because I am building a neurofeedback with the TGAM1 module and Arduino. Right? Thank you very much.

[@flynnsmith8024]

Hey mate fantastic video! Really informative! I really appreciate that you took the time to show us all the methods! Keep up the awesome content!

[@phils6926]

Very helpful as I need to put something together to record a real heart problem. Why isn't the cardiology department doing it? Because there's a long wait to get an appointment so getting evidence now plus some means of recording it. Also, there's good chance that the symptoms won't be there on the appointment day. Useful safety information as well. You could avoid the 9-volt battery by using some Lithium cells.

[@SodiumInteresting]

Read some other comments, I dont think this makes a very accurate representation. Noise free ecg needs a lot more than this setup

[@davidfriesen9625]

A fascinating project. Might have to try this some time soon.

[@jcolivie]

Congratulations .. Excellent video !!!

[@sparrow6190]

Definitely going to substitute the 9v battery for something else, maybe a combination of 18650's and a 3.3v regulator board. I need this for 24/7 monitoring though, so that's pretty important

[@whitetomato]

holter monitor would be better. this does not look calibrated

[@Ronnock]

You just got another subscriber.

[@vawcreations5887]

GOOD PROJECT AND A GOOD VIDEO.

[@midnighthighwaycasettedust9940]

why didnt you use 2 1.5 batteries in series? instead of 9 volts can I use 1.5 batteries with this circuit, will there be any problem?

[@anormes]

Voltage from the battery will drop lower than 3.3v, which will give inaccurate results

[@martinjames7847]

Lovely! I've got all the bits and will be building this soon. Can I get audio from the Arduino method? Like you got from your second method?

[@thomasfarmer12]

Hi, this looks really cool! One question: which arduino did you use? Is it important to check that the voltage of the arduino is 3.3V? Most arduino seem to operate on 5V but the AD8232 needs 3.3V.

[@stonent]

It says nano on the board in the video.

[@whitetomato]

i think the arduino is operating on 5v but the board provides 3.3v to the ecg module

[@pawelkowalski2492]

Hi buddy. I have one question about this project. I would like to add an OLED or 1.8 TFT display. Have you done this version of the project? Instead of 9V batteries, I will use 18650 batteries and a charging module with a mobile phone power supply.

[@KunalkrManna]

playing music from your mobile will make your heart dance 😁

[@HEREDEROp]

can u show diy emg too

[@nockylogic]

This is awesome. Can this be done for an electrogastrograph?

[@francescopiccini4915]

This is very interesting question. I would like also to know it!

[@clutch302tc]

Can you also display ekg on a 7-9” flat screen tv monitor screen?

[@widi1705]

sehr schönes Video - Vielen Dank !!!

[@iangoh8968]

You can try put a 104 mlcc series to the output to reduce movement noise

[@nitelite78]

What if you wanted to attach some electrodes to someone's legs to monitor muscle movement during sleep. Could something similar work?

[@biomed2560]

Just happened to see your question a long time after you posed it. I am a retired biomedical engineer. By 'muscle movement' you may mean the signals that muscles generate when they are contracted. The two factors here are that muscle potentials (as they are called) are of much higher frequency that ecg signals - muscle potential recorders need to have a frequency response up to at least 2KHz (whereas ecg recorders only need a frequency response up to around 50Hz max and much lower will be OK. Secondly muscle potential recorders (electromyographs, emg) need to have greater amplification as the signal coming from the electrodes is in the region of 20 to 50 microvolts. This is in comparison with about 1 millivolt from the ecg electrodes. I'm afraid that it is unlikely that the setup demonstrated in the video will be suitable. If it is only gross limb movement you want to know about, there is a very simple and crude way of recording it. That is with thin conductive rubber attached to the ends of the limbs. As the limb stretches and returns to unstretched, the rubber will get thinner and its resistance will go up and down. Just measure and record the resistance. This was the basis of early respiration monitors with thin conductive rubber stretched around the patient's chest which changed in resistance as the patient breathed in and out and the resistance changed. Here endeth the lesson.

[@nitelite78]

@@biomed2560 Thanks for this. Yes it was just muscles tensing rather than limb movement I was interested in. So sounds like this is a non starter. Just for why I was requesting this - I am diagnosed with MECFS but I have unusually muscular legs for someone who is effectively bed bound for 20-22 hours a day and struggles with walking. I have been suspicious that my legs tense up during sleep as they try to act out walking in my dreams and that is perhaps why I wake feeling exhausted. My brain is doing its job of preventing limb movement during sleep but doesn't seem to be shutting down muscles. The thing that made me most suspicious was when I once woke up and I could feel my legs muscles undulating left, right, left, right as I regained consciousness from sleep. I was having a dream where I was walking just before waking. I've also spoke to one other person with the same MECFS diagnosis who has similar issue with unusually muscular legs and she suspected similar. So I was just wondering if it were possible to make a DIY kit to test this. Unfortunately it looks like this isn't feasible. I did try filming my legs several years ago but didn't see anything unusual in terms of movement but I don't think a camera would show the kind of tensing muscle movement I am describing as it involves legs being more or less stationary.

[@michelfrance75]

Arduino solution : I doubt that the plot corresponds to the execution of such a simplistic program which can only give artifacts depending on the heart rate and the baud rate of the serial port. The acquisition of a noise-free ECG is a complex instrumentation problem that requires, in particular, an irreproachable cabling design. Besides the need for a programmable gain amp before the ADC converter to match the exam conditions, much more accurate digitization on at least 16-bit or better 24-bit is imperative to detect most problematic cardiological situations. A low cost Seeeduino XIAO or ESP32 (12 bits) or an external ADC ADS1115 would be nice here, or better MAX11040K-MAX11060 or AD7768 (24 bits - 256 kSPS SPI ~23 €).

[@GetRealwithMike]

Why does there always have to be haters? A better approach might have been - "this may not get accurate results. Try this because the way you are doing it misses data... "Seeing it on KZbin and you don't agree with a video so you go straight for the throat. Nice. That's a really sorry-ass approach as long as we're handing out opinions...

[@michelfrance75]

@@GetRealwithMike Rest assured, it's not about "hate". First, a medical instrument where the patient can be connected to an oscilloscope (or computer) itself connected to the 240V can constitute an "electric chair". There are standards to be met in the electronics of the ECG itself and not to mention the connection, it's not a gimmick. In addition there are installation rules concerning analog and digital grounds especially for weak signal amplifiers. I invite those who read us to use the Analog Device Application Note of the AD8232, there is a lot of useful and reliable information concerning the correct adjustment of the filters (Holter mode or medical office mode), the correct connection of the electrodes (it depends on the manufacturer of the card (for my case it did not correspond) to have a "minimum" 1-channel ECG with reliable results without arctefacts. If it is well done and well connected, I checked a good concordance of the PQRST complex with a professional ECG and that we can even detect ESVs (medical office ECG configuration - motionless patient).

[@phils6926]

@@GetRealwithMike I think "hate" is a bit over the top. michelfrance75 actually added some extra useful information, but you just interpreted it in a completely wrong way.

[@Ryan-mw4zv]

@@michelfrance75interesting idea! do you know if it’s possible to get a 6 lead from this 3 electrode configuration? Have you ever done this for a 12 lead or any of the precordial leads?

[@michelfrance75]

@@Ryan-mw4zv No, I haven't tried. As this is an amateur electronic board and not a professional multi-channel ECG, I limited myself to a basic 3-channel Einthoven circuit. But nothing prevents you from using several AD8232 circuits to produce a more professional ECG. With this 3-electrode device, I was able to clearly highlight electrical anomalies then confirmed by ECG in the office of a cardiologist.

[@mr.satishfy]

Can U try it in lab nation smartscope application

[@abhijithgs8508]

Can we use an Bluetooth module to send signals

[@DasIllu]

Yes

[@jacopopetri751]

bro...if the color follows the standars, the placement is actually wrong. The green lead should be under the yellow lead :)

[@michelfrance75]

Indeed, the connections are wrong. First, the Sparkfun heart monitor board and its Chinese clones correspond to figure 64 of the AD8232 data sheet, so an Einthoven triangle at hands assembly. I checked, the green connector is LA (left arm), the red connector is RA (right arm) and the yellow connector is (right leg).

[@vawcreations5887]

WILL THERE BE NOISE, IF WE USE A PC !

[@akileshmuthoo6011]

Hi can we mafe it with esp32?

[@parottasalna2655]

yes

[@nickuliana9651]

Can someone provide the link for the USB sound card and cords needed?

[@erikelshout]

your soundcard setup does not work because the AC coupling at the input of your sound card. (or before the AD converter) use DC coupling or f0 at0.1Hz

[@April2023-fb6pf]

Can we know HVR from this?

[@nickuliana9651]

Is the circuit board called adveeno or alveno?

[@pixiechild6022]

Arduino

[@caplukas9326]

Why there are 3 pads and only one graph?

[@TrainLoveSince2009]

as far as i understood its measurment (red,yellow) and a reference voltage

[@ansubanerjee672]

Hey, just asking is there any way to update the code that there is a beep whenever the hearbeat is detected?

[@DasIllu]

Simple hysteresis detection does the trick. You beep when the signal crosses a certain threshol and then lock the beeper. When the voltage falls beneth a level a bit lower that the previous voltage than the beeber is unlocked and triggered again. Not to be a doomsayer but you also want to count the time between beep triggers and if it exceeds 2-3 seconds you want an alarm beep (that typically is done by turning the beeper on coninously, aka bad movie flat line sound)

[@Deadwindshadow]

Why not just use 2x AAs?

[@DasIllu]

There is very little wiggle room on a 3.3V chip. If your batteries run a bit low and/or are strained you might easily get below the "2.whatever volts" threshold for detecting a logic high level. Voltage regulators allow you to connect a higher voltage battery to ensure safe operation until the dropout voltage of said regulator is underrun.

[@ayan.debnath]

Can I use a ESP8266 D1 Mini?

[@parottasalna2655]

yes

[@agboolanajeem5268]

👍👍👍👍

[@dorisbenjamin1803]

My plotter is not working plz help

[@electrotechnik3649]

С хорошим АЦП результат был бы лучше. Например я использовал arduino due у которого разрешение 12bit и результат был довольно неплох, шум был минимальный, буду экспериментировать с ads1220 у которого разрешение 24bit.

[@dorisbenjamin1803]

Help me with a plotter

[@user-bj4lp3fr1o]

What did use to create the graphs?

[@hrig8729]

serial plotter on IDE

[@benmedka]

❤❤❤❤❤😂

[@thomasbinder4905]

top 5 stars.... but tell us how we can use it on or better whith a android phone, so easy. i have a smal monitor and WLAN cip in front. but a wave x/y don,t i can see it. the cip is from TTGO. wlan and monitor chip verry smal ,but he have all collors bleue,and red all.... and he have a usb/c output or input. ??? but i think i need a app or a pogram. you have a idear for me. nobody get the 3 output pinns for the monitor whey. by by have a nice day. and i say thank,s in front of it. for your help, thanks...

[@wlfgang]

respiratory sinus arrhythmia

[@kevenbates4313]

lol, you nailed it. There is no dining it now, we have confirmed he is a vertebrate.

[@tarkatirtha]

Your work is commendable but you can not use it in EMERGENCY!

[@JonasKjeldmand]

Its because its a cheap sensor unfortunately. It is simply just low quality.

[@eur521]

I am an electronic enthusiast from China, and I really like the video you recorded about circuit applications. I want to forward it to a Chinese video website so that more Chinese electronic engineers can see it. Can I get your authorization? Looking forward to your response. @Aatikslab