The Credit Card ATtiny Game Console is a homemade, card-sized handheld called “Gametiny,” not a retail console. Its design puts an ATtiny85 on a removable cartridge and combines it with a small OLED, six buttons, sound and a CR2032 battery. The frame can be an expired credit card, cardboard or plastic.
What the project is
Project author Billy Cheung describes the idea simply: “I built a game console on an expired credit card.” The thin card-like frame is the defining form factor; the electronics make it a functioning handheld. Cheung’s build adapts ideas from the ATtiny Joypad and ATtiny Arcade projects and uses a swappable ATtiny85 cartridge to change games.
The project is documented as a build guide, not a commercial product listing. Its page does not establish current availability, component prices, measured battery runtime or ongoing support for the software setup.
How the console is arranged
Main board
The main board carries the display, six controls, power components and the socket for the game cartridge. The design uses a 0.9-inch I²C monochrome OLED with an SSD1306 controller, a CR2032 cell and holder, a mini piezo sound unit, a switched 3.5 mm headphone jack, a 10K volume control and a slide power switch. The tutorial describes wiring and soldering the parts, then covering the back with a second card.
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- 【Powerful Performance】Equipped with Xtensa 32-bit LX7 dual-core processor, 512KB SRAM, 8MB external PSRAM and 16MB Flash, providing strong support for smooth operation of retro games and complex embedded development projects.
- 【Stable Wireless Connection】Integrated 2.4GHz Wi-Fi and Bluetooth, enabling stable network communication and wireless connection with other smart devices, expanding more usage scenarios.
- 【Excellent Visual Experience】2.4 inch TFT-SPI screen with clear display and smooth picture refresh, restoring the classic texture of retro games and bringing immersive gaming experience.
- 【Multi-Platform Support】Compatible with multiple simulator platforms, supporting up to 13 classic retro game platforms, enabling you to relive a variety of classic games.
- 【Free Technical Support】Professional technical support team provides free consultation and problem-solving services to ensure a smooth learning and development process.
Removable game cartridge
Each cartridge is an ATtiny85 in a SOD-8 package mounted on a small piece of perf board with an eight-pin header. The header fits the console’s cartridge socket and also serves as the connection point for a USBasp programmer when loading game code. Swapping cartridges is the project’s method for changing games.
Parts and fit to check before building
Cheung’s project page lists the components below. Match each chosen part to the schematic and confirm its package, pinout, voltage and physical dimensions before soldering; a part with a similar name may not fit electrically or inside the frame.
Rank #2
- 【High-Resolution 1.3inch LCD Screen】GamePi13 game console onboard 1.3inch LCD 240x240 resolution, 65K color display screen, integrated ST7789 Driver Chip.It has bright display screen and smooth operation performance
- 【12 Customizable Game Buttons】12 customizable buttons effectively respond for Raspberry PI /RP2040-PiZero controls. Suitable for learning, development and testing Raspberry Pi projects, offering a variety of options for DIY makers
- 【Onboard Audio Output】Output high-quality audio, and the background music that surrounds your ears makes you feel like you're there
- 【SPI Interface for Fast Communication】SPI interface communication is adopted, and the signal transmission is more stable and faster
- 【Versatile Applications】Portable game consoles, Raspberry Pi project extensions, smart IoT devices, science fiction and artwork
- ATtiny85 microcontroller in SOD-8 package for each cartridge
- 0.9-inch I²C monochrome OLED display with SSD1306 controller
- CR2032 cell and holder
- Mini piezo sound unit
- Six silent buttons
- Switched 3.5 mm headphone jack
- 10K volume control
- Slide power switch
- Small perf board and fine insulated wire
- USBasp programmer
- Thin card-like frame material: an expired card, cardboard or plastic
The project does not provide controlled comparisons of those frame options or measured performance figures. For an adaptation, practical fit checks include frame thickness and workability, the OLED’s dimensions and I²C pinout, cartridge clearance for the ATtiny85 package, programmer compatibility, and room for the battery holder, buttons and sound parts.
Programming the ATtiny85
The older tutorial describes an Arduino IDE and USBasp workflow: install or select an ATtiny board definition, choose the ATtiny85 and a clock setting, burn the fuses, then compile and upload the game code. It links the schematics and source code from the project’s GitHub repository. Because these setup steps come from an older guide, verify that the board package, IDE version, programmer and code still work together before relying on them; current compatibility was not established by the project description.
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Rank #3
- Easy project for beginners!
- Stronger bass frequencies and more steps than the original APC
- 3 potentiometer controls - Frequency (VR2) and Pulse Width (VR3) contour the tone while the Volume control (VR1) sets your output just right
- 2 Control Voltage (CV) inputs allows step sequencers and waveform generators to expand the sonic capabilities of the Atari Punk Console from drone to arpeggiated dynamism
- Requires a 9V battery or a 2.1-2.5mm 9V center negative power supply of at least 50mA (not included)
What the guide does—and does not—establish
The project page is useful as a design and build reference for a compact, cartridge-based ATtiny85 game console. It does not report a measured battery runtime, provide a verified present-day parts source, or establish current software-toolchain support. Treat component availability and setup compatibility as items to confirm for your own build rather than assumed guarantees.
Quick Recap
Best Value
- CUSTOMIZABLE REAR BUTTON COVERS: Personalize your console with interchangeable rear button covers, allowing you to easily refresh its look and enhance its collectible value.
- VIBRANT HD DISPLAY: Immerse yourself in retro gaming with the 3.2-inch IPS screen featuring a sharp 1024x768 resolution. Enjoy vibrant colors and clear visuals for a truly engaging experience.
- POWERFUL PERFORMANCE WITH EXPANDABLE STORAGE: Powered by the Allwinner A133P processor, 1GB RAM, and 8GB internal storage, the Trimui Brick delivers seamless gameplay. Plus, expand your storage up to 1TB with a TF card, keeping your favorite games always on hand.
- COMPACT & TRAVEL-READY: Designed for portability, this lightweight console is perfect for gaming on the go—whether commuting or on vacation, your games are always within reach.
- DURABLE & PERSONALIZED DESIGN: The aluminum alloy back cover ensures long-lasting durability and effective heat dissipation. Customizable buttons and ambient lighting let you add a personal flair to every gaming session.
Rank #4
- The Atari Punk Console is one of the most famous and recognizable Lo-Fi synth circuits ever!
- Using a single 556 dual timer IC with minimal part count, the Atari Punk Console circuit is a solid, time-tested noise generator capable of outrageous square wave madness!
- Low part count = easy build for beginners!
- 3 potentiometer controls - Pulse, Width, and Frequency.
- Powered by 9V battery connector or DC Jack.
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