Circuit Diagram

The diagram below provides a visual reference for wiring of the components. This diagram was created using the software package 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 420mAh battery via the Lipo Backpack. This allows the USB port from the ItsyBitsy nRF52840 to charge the 420mAh 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.

NeoPixel Ring

The Eye is illuminated by a NeoPixel Ring.

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

Servo

• Data (Yellow) from the Servo to A2 on ItsyBitsy nRF52840
• 5V+ (Red) from NeoPixel Ring to Vhi on ItsyBitsy nRF52840
• G (Brown) from NeoPixel Strip to G on ItsyBitsy nRF52840