> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On
Behalf
> Of David Duffy (AVD)
> Sent: 04 November 2009 06:35
> To: Microcontroller discussion list - Public.
> Subject: [EE] Heart beat logger
> 
> Has anyone here built a heart beat logger? I'm wanting to log each
beat,
> not the average rate.
> 
> It would be worn by the user while sleeping. Wireless would be ideal,
> but tethered is not out of the question.
> 
> I've looked at some of the exercise watches, but they seem to log
> activity (average / min / max rate), which is not what I'm after.
> 
> Hospitals have them but I would think they're not in the "buy for
> yourself" price range.
> 
> A medical one I've seen has 4 posts (~ 80mm x 120mm pattern) on the
case
> that you press against your bare chest. You can hear a tone (~ 2KHz ?)
> modulated with each heart beat coming from an internal piezo. It
records
> for 60 seconds, then you upload to the hospital via a phone, just like
> an old acoustically coupled modem! (except it's one way)
> 
> One thing I've seen is the chest straps with micro transmitters.
> Normally a watch picks up the signal, but Polar do make an OEM
receiver
> module. The straps are easy to buy, but I've not found any where local
> that sells the modules yet.

Do you just want to log the time between heart beats (presumably looking
for maximum time events?), or do you need some ECG data?  If the former
then could you use one of the IR sensors you clip onto your finger
rather than sticking probes on the chest?

Regards

Mike

=======================================================================
This e-mail is intended for the person it is addressed to only. The
information contained in it may be confidential and/or protected by
law. If you are not the intended recipient of this message, you must
not make any use of this information, or copy or show it to any
person. Please contact us immediately to tell us that you have
received this e-mail, and return the original to us. Any use,
forwarding, printing or copying of this message is strictly prohibited.
No part of this message can be considered a request for goods or
services.
=======================================================================

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist