CIRCUIT TO MESURE HEART

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hoanf
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CIRCUIT TO MESURE HEART

Post by hoanf » Sun Dec 19, 2004 11:29 pm

i'm so happy that could find your site to help me<p>i want to find circuit to mesure rhythm of the heart by using led <p>thanks so much
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redrocker
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Re: CIRCUIT TO MESURE HEART

Post by redrocker » Mon Dec 20, 2004 3:36 am

Hello there, hoanf. A good place to start with something like this is with a kit. Ramsey has just the thing you are looking for, complete with front panel LED indicator. <p>http://www.ramseyelectronics.com/<p>They also offer extra probes for an additional fee, something you may want to purchase since you will be ordering from Vietnam.

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dacflyer
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Re: CIRCUIT TO MESURE HEART

Post by dacflyer » Mon Dec 20, 2004 4:43 am

interesting...i would like to figgure out how to get one of them clip on finger probes to work,that the hospital uses to to measure heart beat and or Oxygen levels

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Chris Smith
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Re: CIRCUIT TO MESURE HEART

Post by Chris Smith » Mon Dec 20, 2004 6:12 am

dacflyer
They are optical, and use IR leds. <p>The blood shifts from red to blue with oxygen, or lack there of.

Engineer1138
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Re: CIRCUIT TO MESURE HEART

Post by Engineer1138 » Mon Dec 20, 2004 7:09 am

dacflyer: you may have just suggested my next project :)
The clip on cardiotachometer sensors use IR like Chris said. I tried building a heart rate monitor using LEDs years ago, and I was able to get a signal, but it was extremely noisy, and I gave up. It's still an interesting project though, and I think when I wrap up the current one, I'll look at it. If it works I'll put schematics up on the site.

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dacflyer
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Re: CIRCUIT TO MESURE HEART

Post by dacflyer » Mon Dec 20, 2004 11:15 am

ok , cool idea..i am sure it will have to be a PIC project..or?

pboese
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Re: CIRCUIT TO MESURE HEART

Post by pboese » Mon Dec 20, 2004 4:48 pm

The December issue of Circuit Cellar has an article about designing a pulse oximeter using a Light-to-Frequency convertor chip. That's one of those finger clip devices that can measure your heart rate and saturated blood oxygen. The article is very good. The article is in the "FROM THE BENCH" column by Jeff Bachiochi. It's an informative read.<p>[ December 20, 2004: Message edited by: Axlen ]</p>
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