[JSR_FDED]

If it can read your heartbeat from your wrists resting next to the trackpad, maybe it can use that as a user satisfaction signal for gratuitous UI changes.

[pbhjpbhj]

If it's sensitive enough to read a heart beat, then surely it can be used as a covert microphone?

[gavinsyancey]

The laptop also contains a normal microphone. You can't access this without root; if you have that you have permissions to access the real microphone.

[Quppi]

From testing, it seems to require me to press my wrists quite hard against the macbook to get a somewhat accurate reading on the heartbeat. Non the less a cool project and I wasn't even aware my macbook has an accelerometer.

[1e1a]

The sample rate is only ~800hz (probably very difficult/impossible to increase)

[rcxdude]

Depends on the bandwidth.

[rcxdude]

depends on the bandwidth