OLED rotary led switch

AirScope

AirScope is a custom-designed mechanical macropad featuring an OLED display, rotary encoder, and four mechanical switches, all powered by a Seeed Studio Xiao RP2040.

Why?

As an Avgeek, I wanted a shortcut that would allow me to immediately see any flights within a specified radius. The ultimate goal of AirScope is to connect to the internet, communicate with ADS-B APIs, and produce an output of nearby flights based on location.

Features

AirScope consists of three main interactive components:

• Rotary Encoder: Allows you to change the radius of the flight track in 2km increments.
• 4x Mechanical Switches: Map to Arrow Keys and Enter to sort through flight data options.
• OLED Screen: Displays the current search radius and system status.

Software Used

• KiCad: PCB Design
• Fusion 360: Enclosure & Lid Design
• QMK: Firmware handling HID inputs and OLED tasks

Current Build (25/03/2026)

As of right now, AirScope has not reached its full functionality. In the future, I plan to write a Python script once I learn more about interacting with APIs. Currently:

• The rotary encoder successfully updates the search_radius variable and the OLED display.
• The switches mimic the arrow keys and Enter key of a standard keyboard.

Design & Assembly

KiCad Schematics

KiCad PCB

Fusion 360 Case

Design includes a dedicated USB-C tunnel for the Xiao RP2040.

Fitting

The assembly uses:

• 4x M3x16mm screws to secure the PCB to the inner pillars.
• 4x M3x16mm screws to secure the lid/plate to the outer corner cylinders.

BOM (Bill of Materials)

Here is everything you need to build this macropad:

• 1x Seeduino Xiao RP2040
• 1x OLED Screen 0.91 inch
• 4x Cherry MX-style Switches
• 4x Keycap
• 3x SK6812 MINI-E LEDs
• 1x Rotary Encoder
• Custom printed PCB & 3D Printed Case(2 parts)
• 8x (4 of my own) Screws M3x16mm