The diagram below provides a visual reference for wiring of the components. This diagram was created using the software package Fritzing.

Adafruit Library for Fritzing

Use Adafruit's Fritzing parts library to create circuit diagrams for your projects. Download the library or just grab individual parts. Get the library and parts from GitHub - Adafruit Fritzing Parts.

Wired Connections

The ItsyBitsy nRF52840 is powered by 500mAh battery via the Lipo Backpack. This allows the USB port from the ItsyBitsy nRF52840 to charge the 500mAh battery. A slide switch is connected to the two switch pin on the Lipo Backpack. 

  • BAT from Lipo Backpack to BAT on ItsyBitsy nRF52840
  • Ground from Lipo Backpack to GND on ItsyBitsy nRF52840
  • 5V from Lipo Backpack to USB on ItsyBitsy nRF52840

Slide Switch

A 2-pin slide switch is wired to the switch pins on the Trinket/ItsyBitsy Lipo Backpack as shown in the diagram above.

Heart with NeoPixel Strips

The heart is made of up several strips of NeoPixels. The separate pieces will be wired together in a "daisy chain". Reference the labels on each strip to ensure polarity is correct. The diagram features labels for referencing the pixel number and the flow of data in and data out. The pixels are wired from top to bottom, left to right. The neopixel at the end of each row will need to flow into the far left neopixel on the subsequent row. 

  • 5V+ from NeoPixel Strip to Vhi on ItsyBitsy nRF52840
  • G from NeoPixel Strip to G on ItsyBitsy nRF52840
  • DIN from NeoPixel Strip to Pin #5 on ItsyBitsy nRF52840

This guide was first published on Feb 12, 2020. It was last updated on Dec 08, 2023.

This page (Circuit Diagram) was last updated on Feb 07, 2020.

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