Flashing multiple LEDs using an astible multivibrator for a Valentine Heart shaped project
[![Beating Heart LED Valentine Ornament](https://img.youtube.com/vi/JV8OCEDBLNU/0.jpg)](https://www.youtube.com/watch?v=JV8OCEDBLNU)
**ECG Arduino shield**
it is the electrical activities of the heart. During each heartbeat, a healthy heart has an orderly progression of depolarization that starts with pacemaker cells in the sinoatrial node, spreads out through the atrium, passes through the atrioventricular node down into the bundle of His and into the Purkinje fibe...