Joined: 19 Jan 2009
|Posted: Mon Nov 28, 2011 10:35 am Post subject: reading data from a heart rate belt
so today I took my hammer and opened my "Kalenji hear rate belt"
I was expecting to find a microcontroller and some kind of 433MHz emitter, instead there is only analog circuit
I identified 2 circuit, one is a monostable, the other is a quad NOR gate.
Does any of you see something interesting in this?
I mean, do you know any wireless transmitter design wich uses a monostable and some NOR gate?
all I have is an low cost digital oscilloscope, since i'm not in college anymore I can't get my hand on some frequency analyser, etc
datasheets can be found here :