Teensy 2.0++ AT90USB1286 USB AVR Development Board

Expanded 8-Bit AVR Processing: Powered by the high-capacity AT90USB1286 microcontroller running at 16MHz, delivering increased memory and expanded I/O count for complex USB projects.

Native USB Controller Integration: Features full-speed USB 2.0 emulation, enabling custom USB HID controllers, mechanical keyboard firmware, MIDI devices, and serial equipment without external USB bridge ICs.

Generous Onboard Memory Layout: Equipped with 128 KB of Flash memory (1 KB reserved for bootloader), 8 KB of SRAM, and 4 KB of EEPROM for storing extensive firmware code and persistent settings.

High-Density I/O Header Layout: Exposes 46 digital I/O pins, 8 PWM outputs, and 8 Analog Input channels (10-bit ADC) on standard 2.54mm pitch breadboard-compatible headers.

Teensyloader & Arduino IDE Support: Integrates seamlessly with the Teensyloader flashing utility and Arduino IDE (via Teensyduino) for smooth, hassle-free development and code uploads.

Module Construction: Constructed on a compact, double-sided green FR-4 glass epoxy PCB featuring high-density SMD components, Mini-USB port, tactile reset switch, and crystal oscillator.

Operating Voltage & Logic: Operates natively at 5V DC via host USB power (can be modified for 3.3V operation via onboard solder pads).

Handling Precautions: Practice standard electrostatic discharge (ESD) safety procedures when making header connections. Double-check pin polarity before applying external supply voltages.

Environmental Limits: Operating temperature range spans -20°C to +70°C. Keep protected from moisture, metallic debris, and physical force on connector joints.

The Premier Option for Custom USB Controllers: Position as the expanded, feature-rich choice for DIY arcade controllers, multi-key macro pads, custom mechanical keyboards, and legacy USB devices.

4x the Flash & SRAM of Standard Teensy 2.0: Highlight its massive memory upgrade over the standard Teensy 2.0, making it ideal for firmware that requires heavy key-mapping tables or complex signal routines.

Recommended Cross-Sell Add-ons: Pair with Mini-USB Interface Cables, Breadboard Jumper Wires, Tactile Switch Packs, and OLED Display Modules (I2C/SPI).

Essential Tool for Hardware Hackers & Engineers: Great addition to university electronics labs, custom input controller projects, and embedded system prototyping benches.