This is about making a heart rate receiver from the Polar chest bands.
They work at 5.3kHz and so you need a small circuit to make them work.
There is not yet a finalized design but this is the info i have so far. You can find it here.
Just a simple temperature IC. This solution uses the arduino digital pins to supply power for the IC.
The page can be found here. Lets hope i wired it correctly and not get incorrect results like below.
Another little I2C IC this time giving three axis acceleration data. http://www.fact4ward.com/blog/ic-if/bma180/
Played around with the ITG3200 gyro today cool. http://www.fact4ward.com/blog/ic-if/itg3200/