@cajst56st Infrared LEDs are quite durable and the battery was dying anyways, so the voltage dropped to just the right amount. I should have used one, though, you're right.
I was looking for a program that would do this for me thanks, instead of makeing a program for this. Now to 1/2 any incomeing signal but remodulate it software wise and i should be able to input all sorts of signals. Basicly change a 88khz into a 44khz then input it into my computer mic and then using software change it into a 88khz looking signal again.
My god thats cool. Thanks for uploading this. I'm prescribed dexedrine for ADHD and tend to go a bit over the top with it, with this I could see how my heart rate is.
ps: now play around a bit... try to trigger an extrasystole (if you can); you will notice only a small reading on the pulse oximeter, as an extrasystole is very inefficient / pumps very few blood. also, try cutting off the blood flow by e.g. pressing a tennis ball into your armpit. notice when the blood flow / spikes disappear on your pulse oximeter, and at which pressure they just begin to reappear again (that will be your systolic blood pressure, of course!).
That´ll be kind of difficult as i still need both hands to measure and the whole setup is extremely sensitive (these are the very best parts of about 15 minutes of recording).
I think I´ll make a more professional device, though, as this seems to be very interesting ;-)
well, you dont need any hands to squish a tennis ball with the muscles of your upper arm... but it indeed may produce some motion, yes. as for the extrasystoles, i can e.g. trigger them by inhaling VERY deep, or by having a really full stomach, so especially the latter does not involve motion. :)
how to trigger extrasystoles would´ve been the next thing i asked you ^_^
yesterday i recorded my heartbeat for more than 20 minutes, trying to catch at least one single extrasystole, my heart however had a different imagination of what it would do that day and worked perfectly throughout the experiment (kinda good to know, don´t you think?)
Mich hat das jetzt gar nix gekostet, ich hatte überall den Schrott rumliegen...
Die Teile zu kaufen kostet dich auch nicht dein haus (30 cent Fototransistor, 1 euro die LED, 4,99 das Kabel-> wobei du die Verbindungskabel von deinem Lautsprecher nehmen kannst)...
Ich finds auf jeden fall witzig wenn man mal nix zu tun hat und seinem blut beim zirkulieren zuschauen will :P
hmm it's not ecg since you're not reading the heart's electrical activity at all, but cool ; )
joaopitagoras 1 month ago
that is extremely cool
moosey333 3 months ago
wait if its reading IR then if you point a remote at it...?
00011theman 5 months ago
Don't you need resistors so that the led or foto don't blow?
cajst56st 8 months ago
@cajst56st Infrared LEDs are quite durable and the battery was dying anyways, so the voltage dropped to just the right amount. I should have used one, though, you're right.
sciencoking 8 months ago
What is the song used in the video? :)
juuliuuz 10 months ago
@juuliuuz Kraftwerk - Elektrokardiogramm
sciencoking 10 months ago
@sciencoking Thanks :)
juuliuuz 10 months ago
I was looking for a program that would do this for me thanks, instead of makeing a program for this. Now to 1/2 any incomeing signal but remodulate it software wise and i should be able to input all sorts of signals. Basicly change a 88khz into a 44khz then input it into my computer mic and then using software change it into a 88khz looking signal again.
if 44khz, 88khz, 172khz, 344khz, 688khz, 1.376Mhz, 2.752Mhz, 5.504Mhz, 11.008Mhz, 22.016Mhz, 44.032Mhz, 88.064Mhz, 176.128Mhz, Ext.....
Nick2kMan 11 months ago
My god thats cool. Thanks for uploading this. I'm prescribed dexedrine for ADHD and tend to go a bit over the top with it, with this I could see how my heart rate is.
BogMonkey53 1 year ago
very cool
deepcut71 1 year ago
NOTE:
I tried 2 foto transistors in series for the reciever. The signal quality got improved by a colossal factor!
I also use 2 IR-LEDs now, because I realized tat I need more power.
I increased the overall signal quality+strength by more than 50! I really recomend this upgrade!
sciencoking 2 years ago
lol, awesome! both the setup as well as the video / explanation. that vid is going into my favs. ^_^
bionerd23 2 years ago
ps: now play around a bit... try to trigger an extrasystole (if you can); you will notice only a small reading on the pulse oximeter, as an extrasystole is very inefficient / pumps very few blood. also, try cutting off the blood flow by e.g. pressing a tennis ball into your armpit. notice when the blood flow / spikes disappear on your pulse oximeter, and at which pressure they just begin to reappear again (that will be your systolic blood pressure, of course!).
bionerd23 2 years ago
That´ll be kind of difficult as i still need both hands to measure and the whole setup is extremely sensitive (these are the very best parts of about 15 minutes of recording).
I think I´ll make a more professional device, though, as this seems to be very interesting ;-)
sciencoking 2 years ago
well, you dont need any hands to squish a tennis ball with the muscles of your upper arm... but it indeed may produce some motion, yes. as for the extrasystoles, i can e.g. trigger them by inhaling VERY deep, or by having a really full stomach, so especially the latter does not involve motion. :)
of course, who knows if that works on you...
bionerd23 2 years ago
how to trigger extrasystoles would´ve been the next thing i asked you ^_^
yesterday i recorded my heartbeat for more than 20 minutes, trying to catch at least one single extrasystole, my heart however had a different imagination of what it would do that day and worked perfectly throughout the experiment (kinda good to know, don´t you think?)
sciencoking 2 years ago
well, i'd say "neutral to know", because one extrasystole once in a while is perfectly normal, too... ;)
by the way, a lack of sleep can trigger arrhythmia, so does caffeine... maybe something else to try, lol.
bionerd23 2 years ago
I think catching an extrasystole is just a matter of time ;-)
sciencoking 2 years ago
col, gefällt mir, bin leider net so ein hacker xD
Blinkwing 2 years ago
Mich hat das jetzt gar nix gekostet, ich hatte überall den Schrott rumliegen...
Die Teile zu kaufen kostet dich auch nicht dein haus (30 cent Fototransistor, 1 euro die LED, 4,99 das Kabel-> wobei du die Verbindungskabel von deinem Lautsprecher nehmen kannst)...
Ich finds auf jeden fall witzig wenn man mal nix zu tun hat und seinem blut beim zirkulieren zuschauen will :P
sciencoking 2 years ago