Re: Wireless Heart Rate Monitor

From: Spehro Pefhany (speffSNIP_at_interlogDOTyou.knowwhat)
Date: 02/17/05 

Date: Thu, 17 Feb 2005 08:31:21 -0500

On Thu, 17 Feb 2005 10:31:44 GMT, the renowned Dan Major
<nospam@this.address> wrote:

>dalai lamah <antonio12358@hotmail.com> wrote in
>news:tte3bb92z7ff.16ura5qxxoeno.dlg@40tude.net:
>
>
>>> I gave up on the Polar stuff
>>> and made my own system using off-the-shelf RF modules at 413MHz.
>>
>> And the "real" heartbeat sensor? What did you use?
>>
>I used the Polar plastic chest strap, just because I was lazy, and it
>worked. For the EKG amp I used a simple programmable-gain instrumentation
>amp (free sample from Analog) which gated a 555. The 555 output was hooked
>to the input to an RF module that was sold by Radio Shack at the time.
>Several other mfgrs make similae (Lynx, Abacom). Unit was slightly larger
>than Polar xmitr as it used two 9v batteries, but still very small.

Sounds like a good application for a Zigbee link.

Best regards,
Spehro Pefhany 

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