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Optical Subsystem // OV5640

Flush-mounted.
Invisible micro eye.

Precision CNC-machined 2.5K optical sensor embedded flush inside the chassis wall. Crisp, clear captures for accurate answers with seamless integration.

2.5K QSXGA
5MP OV5640 Sensor
Auto FOCUS
Lens Optics
10-bit RAW
RGB Feed
30fps
Zero-Lag Feed
Protrusion Depth 0.00 mm (Flush Fit)
Optics Pipeline DMA Direct Buffer

Welcome to
retard.dev

Courtesy of the Retardation Foundation.

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NEURAL DISPLAY ENGINE

Sub-Pixel Clarity.
LaTeX & Markdown.

Takes full advantage of the 96×64 display to render complex mathematical formulas, matrices, and tables with sub-pixel typography.

Integrals & Calculus
Matrix Eigenvalues
Formatted Data Tables
AI REASONING BACKENDS

Multi-Model AI.
Switch on the fly.

Route symbolic equations, step-by-step proofs, and complex calculations across industry-leading reasoning engines natively.

Claude
OpenAI
Gemini
DeepSeek
retard.dev router

🌐 Persistent OTA

Firmware ships weekly over-the-air. New AI models, new features, and security patches roll out automatically the moment your calc has WiFi.

📑 PDF & TXT Reader

Upload textbook chapters, lecture PDFs, and problem sets through the web portal. Search by keyword and jump directly to the passage you need from the calc keypad.

📡 Low-Latency Backend

A custom Rust proxy sits between the calc and the AI providers. Answers land in under 400 ms even on congested school WiFi and TLS is terminated on our edge so the calc stays lean.

Clean & Ready to Use

Each TI-84 calculator is professionally refurbished, ensuring it looks and functions like new. We meticulously clean and inspect every unit so it's ready for you to plug in and power up with our advanced modifications already integrated. Get started right away!

Our commitment to quality means you receive a device that not only performs flawlessly but also meets high aesthetic standards. Experience the perfect blend of classic hardware and cutting-edge AI.

Custom PCB Design

Professional PCB Design

Our custom-engineered circuit boards are professionally designed to act as the ultimate academic enhancer. By integrating ESP32-S3 and ESP32-C3 architecture directly into the TI-84 ecosystem, we provide a stable, high-performance bridge for advanced logic and connectivity.

Get Your Device

Direct Purchase

Preferred
  • Brand New Unit: We provide professionally refurbished, clean TI-84 units.
  • Pre-Modded: Comes with the hardware and software already installed.
  • Fast Dispatch: Shipments are processed every Saturday.
  • Plug & Play: Ready to use out of the box, just enter your WiFi information and press connect!

System Status

Check live uptime for our Rust API and AI Gateways.

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Choose Your Upgrade Path

Buy a pre-modded unit for instant use, or send us yours for a professional retrofit.

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🧠 Anti-Wipe Logic

Since the mod is hardware-based, clearing your TI-84 memory or RAM does nothing to your AI access.

🛡️ Test Mode Immune

Our custom firmware emulates standard link protocols, allowing you to bypass "Press-to-Test" restrictions.

Two-Way PC Sync

Attach your calc over USB or WiFi and mirror its notes, saved scripts, and screenshots onto your PC. Drag files in from your desktop and they show up on the calc without touching the keypad.

Ready to Begin?

Join thousands of students enhancing their hardware. Professional support is always available if you need a hand.

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