Mimicing a heartbeat in sound and electrical pathways

If you set a cardiac nurse loose on a Propeller microcontroller and some parts you might not know what to expect. But we’re intrigued by the outcome of this project which looks to mimic a heartbeat’s audible and electrical traits. The post about the project is in four parts which are not linked to each other, but you can find them all, as well as a video segment demonstrating the rig after the break.

It seems that this was intended as a Halloween project, but we don’t see why it wouldn’t be interesting any time of year. The Propeller demo board is used to mimic a heartbeat with a pulsing LED. But that doesn’t seem all that awesome, so the sounds of a heartbeat were added to the program to coincide with the blinky light. Here’s where the medical training comes in: the next phase of the process was to lay out an array of LEDs on a breadboard in the shape of the human heart’s electrical system. Now you’ve got a pulsing LED, heart sounds, and a lighted animation showing how the electricity travels through the organ.

To add a little [Poe] to the project there’s also a CdS light sensor. As you approach the project you block some light from getting to the sensor and the heart rate increases.

We think the next logical step is to add a heart rate sensor, so that this can illustrate what your own heart is doing. Boom! Another project ready for the Children’s museum.

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