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

[David Kirkby]

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.