Small keychain camera lying on a wooden table with parts nearby.

Matej Nahtigal’s Keymera: A DIY Keychain Camera that Redefines Lo-Fi Photography

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Written by Seth Sebastian

2026-06-13

A Tiny Innovation in Photography

In the midst of digital saturation, the revival of lo-fi photography offers a breath of fresh air. Breaking away from the digital complexity, the Keymera presents a minimalist solution. Created by designer Matej Nahtigal, this keychain-sized camera is something you assemble at home, thanks to 3D printing.

Small enough to attach to your keyring, the Keymera’s design is pared down to essentials: five 3D-printed parts and four electronic components. It captures genuine 3 MP photos and stores them locally, eliminating reliance on external cloud services.

Close-up view of the camera's lens and colorful circuit board.

Streamlined Design and Assembly

Constructing the Keymera is straightforward. The electronics setup comprises a Seeed Studio XIAO ESP32S3 Sense board, an OV3660 image sensor, a LiPo battery, and a tactile button. This modular system connects through just four solder joints. You print the shell, wire the parts, and snap them together—no screws or glue necessary. Assembly time? A mere two hours, including printing.

Person holding the small, handmade keychain camera in the palm.

Simple, Intuitive Use

Collection of camera components including lens, buttons, and circuit.

A single button operates the Keymera. Press once to power it on, capture a photo, save it to a microSD card, and then let it return to sleep mode. Its standby power consumption of just 10 µA means it can last on your keyring for weeks.

Person assembling small camera parts on a white work surface.

Seamless Photo Access

Camera shown next to various tiny screws and electronic pieces.

Forget cables and apps. Hold the button to activate the Keymera’s Wi-Fi network, connecting via any phone or laptop. Access the gallery page in your browser, view, and download your images—no accounts, no data harvesting.

Camera held in hand, showcasing its compact and portable size.

A Design Beyond a Circuit Board

Image of disassembled camera parts next to each other on table.

This isn’t just about capturing images; it’s about experiencing photography. Keymera’s interchangeable shells, inspired by historical camera designs, allow personalization with any color or finish. From rangefinder to instant camera styles, these shells keep your experience authentic and tactile.

Person using screwdriver to assemble parts of small keychain camera.

An Honest Approach to Photography

Keymera’s files are digitally licensed, ensuring sustainability while offering a unique take in today’s AI-saturated world. With a fixed 3 MP sensor, photos are lo-fi and untouched by technology, embracing pure creativity. It’s more than innovation; it’s an honest companion ready to capture the moment whenever it strikes.

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Close-up of the colorful interface and buttons on the camera.

For anyone looking to break away from complexity and reconnect with the basics of photography, Matej Nahtigal’s Keymera offers a compelling and genuine alternative.

Set of miniature camera prototypes displayed in different colors.

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View of camera from top showing tiny switches and buttons.
Five different colored camera models arranged in a row.
Detailed view of the camera's internal wiring and components.

Source: yankodesign.com