When designing the Circuit Playground Express, Ladyada purposely placed the light sensor near the NeoPixel LEDs so that the light from the LED may illuminate a finger and the sensor measure the minute changes in light signalling someone's pulse. While not medically accurate, the project is easy to do and demonstrates several concepts without a bunch of specialized materials.

This tutorial will show you how to set up the Circuit Playground Express and will display the heart rate via a NeoPixel.

Products

Circuit Playground Express is the next step towards a perfect introduction to electronics and programming. We've taken the original Circuit Playground Classic and...
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This here is your standard A to micro-B USB cable, for USB 1.1 or 2.0. Perfect for connecting a PC to your Metro, Feather, Raspberry Pi or other dev-board or...
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This guide was first published on Feb 20, 2019. It was last updated on Feb 20, 2019.

This page (Overview) was last updated on Jan 15, 2021.