Re: Pulse Sensor: an Open Source Heart-rate Sensor that Rocks by Yury Gitman � Kickstarter

Walter Bender walter.bender at gmail.com
Wed Jul 20 06:40:47 EDT 2011


On Wed, Jul 20, 2011 at 12:33 AM,  <forster at ozonline.com.au> wrote:
> Hi
>
> You can do something similar by placing a finger over the camera and shining a light on your finger.
>
> Unfortunately TurtleArt is a little slow to capture your pulse, the following executes a cycle in about 0.5 sec on a XO1.5
>
> forever
>  show camera
>  read pixel
>  show heap
>  empty heap
>
> This prints the rgb of one pixel centre image ( which is OK because the image is out of focus)
>
> forever
>  print brightness
>
> averages over the image and takes round 2 seconds

I have a partially complete refactoring of the camera code that should
speed things up; in the meantime, I wonder if a simple resistive light
sensor run through the mic input wouldn't do just as well.

I also have a vague memory of someone trying something similar using
audio and the Measure activity.

-walter
>
> Tony
>
>
>> http://www.kickstarter.com/projects/1342192419/pulse-sensor-an-open-source-heart-rate-sensor-that
>>
>> Minus the Arduino, can this plug into the audio/mic port?
>>
>> Sameer
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-- 
Walter Bender
Sugar Labs
http://www.sugarlabs.org


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