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312 Threads found on Heart
I have a few questions regarding High pass and low pass filters when calculating a pulse rate. Why is it that in this link, The cutoff frequency is set to 0.5Hz? Why did the capacitor and resistor be chosen for the HPF? Also why does the gain and cutoff frequency have to be 48 and
Hi everyone, I need some help in identifying a component i found in the board. Its a 6-pin IC. It seems to be heart of my Industrial Timer. I am not able to collect any data about this whatsoever, nor can i find any datasheet... If any one can help me in finding this or something similar...could do huge favors. Plz revert here... I have also
Hello, I just opened up a industrial timer circuit which would work from a range of 24-230V worries about the supply, but what I am curious to know is this component which seems to be the heart of the whole circuit, It is an SMD device 6 pin PDIP. The marking code over it is 2087...moreover it seems to be control circuit of the timer
Hi, I am using easy PIC 6 board with a pic16f887 chip. The code is shown below but I seem to be getting really large values. I am using RA2 as a analogue input (which will be for the amplification circuitry output from my fingertip sensor). I want to achieve each peak (positive) value within 15 seconds and multiply this value by 4 to get beats
Common mode feedback is used in an ECG heart pulse circuit to cancel DC from other muscle movements and AC from mains hum picked up by the patient.
The answer is "it depends..." and some of the things it depends on are the nature and criticality of the product (if it is a heart monitor or drug infusion pump then you really don't want it to stop, but who cares if a LED flashing app stops) and which exception it actually is (a "WATCH' exception is might be safe to effectively ignore but an 'Exec
Are you aware on how heart beat detection is done with optical devices ? The part you specified if for reflexive operation, whereas heart beat sensing is made with optical sensors whose emitter is placed behind the object of interest. Basically, variation in blood flow is detected through the variation of the light.
i am trying to find out if this smartwatch " " or some other similar can be used as a gps and heart rate monitor sensor with arduino. i want to extract data from smartwatch and feed it to arduino via bluetooth.
a signal in the 3.1 GHz to 10.6 GHz frequency range does not have a prayer of penetrating the rib cage and flesh to the depth of the heart. You might want to rethink your approach, maybe use a sub 1 GHz impulse? Otherwise you will just be seeing the skin of the chest moving, and the signal from the heart itself will be so small you will not see i
The MYD-IMX28X Development Board is using the MYC-IMX28X CPU module as the heart of the system which is an ARM9-based system-on-module (SOM) integrated with the i.MX28 processor, 128MB DDR2 SDRAM, 256MB Nand Flash and Ethernet PHY. It is connected to the base board through two 1.27mm pitch 80-pin connectors. The base board has extended many periphe
Hi, I'm currently trying to analyse heart beat sound recorded from the stethoscope to detect heart murmurs/heart diseases. I have found several articles written on this topic but I'm confused on the way to go about it? Would a STFT followed by a amplitude-spectrum do the job of analysing the heart beat or is there a (...)
Hello, every one. I should introduce my self first :) My name is Dragos, i'm 30 years old, and i'm from Romania. I'm an electronics engineer. About 2 years ago I woke up at 6 (instead of 7) cause my girlfriends birthday was coming up and I wanted to make for her a small heart shaped circuit that lights up at night. She doesn?t like the dark and
I have wondered, how can it detect my pulse? Not familiar with your watch, but the medical and exercise industry, commonly use a thing called a "Plethysmograph" to monitor heart rate. This is usually a simple clip that lightly clamps an ear lobe or a finger, but it would work on the wrist or many other parts of the body. If y
I am working on a portable wireless heart monitor with Bluetooth interface. The idea is to measure ECG signals .. I am now searching for a suitable microcontroller with Bluetooth capability which would acquire the signals from ADS1293 ....... The original idea was to work with Arduino, An important factor here is also th
Hello Everyone, I have a prototype of a light based heart rate sensor board that works on many types of skin colour, and can detect heart rate almost anywhere on your body. I am considering buying the parts in bulk so i can get the price really low, so if enough people are interested i can probably get them for ?5/$8. Would anyone be interested
Accuracy of peak detector is critical to avoid false transitions. This generally uses a BPF filter , matched to the spectrum of the heartbeat with AGC and a comparator with optimal hysteresis. Then for 3 digit resolution on rate from 0.8 to 3 Hz the time interval counter must be at least 1000x faster. And 4 digit resolution 10k faster. Due to be
The formula is simple at the heart of it. Variation comes from the assumptions - what supply, pullup strength, output drive strength, etc. Besides this there is not a single right answer, but a continuum of "good enough".
Hi i am designing a heart rate monitor via photoplethysmography, the signal is derived in to port A0 of the PIC as illustrated. I am looking to display results via a 2 thresholds that was set with respect to the voltage reference towards a 10 bit ADC. This is my code, could someone identify any thing wrong with it?? #include <16F877.
The period of a signal is the time measured between parts of it that repeat over and over. A ECG is measured in beats per minute (BPM). Right now my heart is beating at about 84 BPM. When I sleep it beats at about 58 BPM. When I am running fast it beats at about 130 BPM. After I had a heart attack I took a medicine that reduced my heart rate (...)
Hi! I'm making a heart rate measuring app (where you record blood level changes in the fingertip with the rear camera) for fun on the iPhone, but am having trouble setting up a bandpass filter that rejects frequencies outside the 30 - 200 bpm range. In its current state, the filter works just fine when measuring typical resting heart rates (