[time-nuts] Off topic project sort of heart rate monitor NEED BEATS PRE MINUTE TO ANALOG VOLTAGE

[Ulrich Bangert]

> but using typical commerical power supplies driven from the 
> main is not acceptable for medical applications.

Correct! But power supplies that are approved for medical applications can
easily be bought from MEANWELL and they do not cost the world.

At http://www.trcelectronics.com/Meanwell/medical-power-supply.shtml

you may read more about it. I am a regular buyer of the PM15 models and
their outputs really behave different than what I am used from other
switchers.

Best regards
Ulrich

> -----Ursprungliche Nachricht-----
> Von: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von David Kirkby
> Gesendet: Mittwoch, 20. Februar 2013 08:34
> An: Paul Cianciolo; Discussion of precise time and frequency 
> measurement
> Betreff: Re: [time-nuts] Off topic project sort of heart rate 
> monitor NEED BEATS PRE MINUTE TO ANALOG VOLTAGE
> 
> 
> On 20 February 2013 00:58, Paul Cianciolo <paulc at snet.net> wrote:
> 
> > The purpose of this apparatus is to print a rolling chart on the 
> > screen of a computer of heart BPM and then try different 
> technicues of 
> > meditaion  and calming technicues to lower my heart rate for short 
> > periods of time.
> 
> Just a warning, from someone with a Ph.D. in Medical Physics. 
> Unless you REALLY know what you are doing, all this should be 
> battery powered. I don't claim to be an expert on the rules, 
> but using typical commerical power supplies driven from the 
> main is not acceptable for medical applications.
> 
> Dave.
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