Wear A Heart (Monitor) on Your Sleeve
This Valentine's Day forget about the roses and chocolate for something that is a more personal token to your love. By combining a cardiac monitor with LEDs, you can flash a symbol of affection with each heartbeat.
To contract the heart muscles and pump blood, waves of electricity spread through the organs. Two electrodes on the chest, one on each side of the heart, can pick up these electrical feelings. Heart rate monitors usually feed this information to a screen that shows a signal like an EKG. Now, you can send it to a heart-shaped LED display that will pulse along with every beat.
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