Adafruit FeatherWing OLED - 128x64 OLED Add-on for Feather (STEMMA QT / Qwiic) Brand_Espressif 1x Micro USB Port –

1x Micro USB Port – Power and Battery Charging

Is it half of an electronic Oreo cookie

with a black bezel and glass overlay

1 x Kitronik RTC Board

This is known as photoplethysmography

Adafruit FeatherWing OLED - 128x64 OLED Add-on for Feather (STEMMA QT / Qwiic) Brand_Espressif 1x Micro USB Port –A Feather board without ambition is a Feather board without FeatherWings! This is the FeatherWing 128x64 OLED: it adds a gorgeous 128x64 monochrome OLED plus 3 user buttons to any Feather main board. Using our Feather Stacking Headers or Feather Female Headers you can connect a FeatherWing on top of your Feather board and let the board take flight! These displays are small, only about 1. 3" diagonal, but very readable due to the high contrast of an