This project arose while discussing heart and breathing rates with a sports medicine workmate. It quite convincingly generates both "heartbeats" and breathing sounds that alter with temperature.
Left in a darkened room, it could easily convince the gullible
that it's a robot taking a snooze!
For the medics (and non-medics) amongst you, the three
variables widely known as TPR (Temperature, Pulse, Respiration) are perhaps the most fundamental "what's up with the patient" nursing vital signs measure. As an example, check your own pulse and breathing rates, both while exercising and relaxing.
The "heartbeat" LED effect is quite entrancing, since it slowly
increases in brightness to a maximum, then fades away again to darkness.
