Ranger

Ranger is a portable, pocket-sized hardware field scanner. I designed and assembled it myself.

I needed a device for scanning signals and data patterns during field production. Existing options did not meet my requirements. So I built one.

Custom Industrial Design

The chassis is 30mm thick. I modeled it in CAD using OpenSCAD. The design uses Kigumi mortise joints for a clean, interlocking assembly without external hardware on the face.

Inside, it features a dual-stacked cookie assembly with nylon standoffs. A 6.2mm battery cavern houses the power supply.

The front face is completely clean. The internal hardware mounts to the tub floor.

Technical Specifications

• Brain: ESP32 microcontroller running custom C++ firmware.
• Keyboard: Integrated M5Stack CardKB physical keyboard.
• Enclosure: 3D-printed black PETG with internal brass inserts.
• Battery: Lithium-polymer cell fitted into the lower cavern.

All files are open source. The repository contains the CAD files and the ESP32 code.