Complete instructions for this episode of Weekend Projects can be found at makezine.com/projects/beatband-sleeve/ Build an Arduino clone using the MintDuino and then program it to visualize your heartbeat in combination with the Pulse Sensor AMPed. The five LEDs mounted to the lid of the tin will flash in sync with your heartbeat's rhythm. Does your heartbeat speed up when you don't tell the truth? When you play video games? When you meditate, can you slow your heartbeat down? Build the Beatband Sleeve and find out!

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