[time-nuts] Off topic project sort of heart rate monitor NEED BEATS PRE MINUTE TO ANALOG VOLTAGE
Hal Murray
hmurray at megapathdsl.net
Tue Feb 19 20:38:42 EST 2013
paulc at snet.net said:
> The actual electrodes instrumentation amp is pretty much working fine so no
> worries there.
> My first tthought was a frequency to voltage IC like the LM2907 or the 2917
> but I get the impresiion from the data sheets that these chips will not work
> at these very low 1 Hz applications,
If you have clean pulses, connect them up to the PPS input on a PC serial
port. The rest is software.
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