Inside, an Arduino Nano is hooked up to a series of WS2812b LEDs. The LEDs are flashed in time with the heartbeat of the person holding the heart, thanks to a MAX30102 heartbeat sensor.

At the children’s museum here there is an exhibit that is some sort of bespoke circuit to count your pulse if you put one hand each on a couple of electrodes (brass cylinders on a durable handle).

Next is the Hookup diagram of the Arduino 4-Digit 7-segment LED Display, followed by the Arduino sketch. ... /* * Arduino 4x7 LED Display * Displays numbers ranging from 0 through 1023 * Test Code ...

Be still my beating heart! Andrew O'Malley's pulsing heart lamp looks alive with two Arduino-controlled settings: soft beating and cardiographic wave.