Digispark ATtiny85 Development Board — Arduino Compatible Microcontroller

💡 Overview The Digispark ATtiny85 is a tiny, Arduino-compatible development board built around the Atmel/Microchip ATtiny85 microcontroller. Despite being smaller than a quarter, it features a built-in USB-A plug, an on-board voltage regulator, and the Micronucleus USB bootloader — letting you program it directly from the Arduino IDE without a separate programmer. Just plug it into any USB-A port, upload your code, and you're running. ⭐ Key Features Ultra-Compact Design — Smaller than a quarter, perfect for embedding into tight spaces and portable projects Built-In USB-A Plug — Plugs directly into any USB-A port for programming and power — no cables needed Arduino IDE Compatible — Program using the familiar Arduino IDE with Digistump board support Micronucleus USB Bootloader — No external programmer required; upload sketches directly over USB 6 I/O Pins — Supports digital I/O, PWM (3 pins), and analog input (4 channels) On-Board LED — Built-in LED on pin P1 for easy testing and debugging On-Board 5V Regulator — Can also be powered via VIN pin (7–12V) for standalone projects USB HID Capable — Can emulate USB keyboards, mice, and other HID devices 📋 Specifications Parameter Value Microcontroller Microchip ATtiny85 Architecture 8-bit AVR Clock Speed 16.5 MHz (internal PLL) Flash Memory 8 KB (~6 KB available after bootloader) SRAM 512 bytes EEPROM 512 bytes Digital I/O Pins 6 (P0–P5) PWM Outputs 3 (P0, P1, P4) Analog Input Channels 4 (P2, P3, P4, P5) Operating Voltage 5V Input Voltage (VIN) 7–12V USB Interface Built-in USB-A plug (USB 1.1 Low Speed) Bootloader Micronucleus (V-USB based) On-Board LED Yes — connected to P1 Board Dimensions Approx. 25 × 18 mm (0.98 × 0.71 inches) L × W 📌 Pin Configuration Pin Digital I/O PWM Analog In Special Function P0 Yes Yes — SDA (I2C), MOSI (SPI) P1 Yes Yes — MISO (SPI), On-Board LED P2 Yes — A1 SCL (I2C), SCK (SPI) P3 Yes — A3 USB D+ P4 Yes Yes A2 General Purpose (safest pin) P5 Yes — A0 RESET (do not reconfigure) 🎯 Typical Applications USB HID devices — custom keyboards, macros, shortcuts, and mouse emulators LED controllers and RGB lighting effects Sensor data logging (temperature, light, humidity) Wearable electronics and compact embedded projects Home automation triggers and IoT sensor nodes Educational projects and learning Arduino programming Rapid prototyping of simple control circuits 📦 What's in the Box 1 × Digispark ATtiny85 Development Board (USB-A) Header pins (require soldering) ⚠️ Important Notes The Digispark uses a unique upload process: click Upload in the Arduino IDE first, then plug in the board when prompted. The bootloader only listens for new code for ~5 seconds after power-on. See the User Guide for more details and extensive programming instructions  Windows users must install Digistump USB drivers before first use. See the User Guide for instructions. The ATtiny85 does not have a hardware UART — the standard Arduino Serial Monitor is not available. With ~6 KB of usable flash memory, keep sketches small and avoid large libraries. Pin P5 is the RESET pin. Reconfiguring it as I/O will permanently disable USB programming. For best results, use a USB 2.0 port. Some USB 3.0 controllers may have compatibility issues with low-speed USB devices. 📄 Documentation & Resources For detailed setup instructions, Arduino IDE configuration, driver installation, wiring diagrams, and example projects, see our comprehensive User Guide: Digispark ATtiny85 Development Board User Guide All Arduino-Compatible Microcontroller User Guides Sold and supported by Envistia Mall. Ships from the USA. For wiring diagrams and troubleshooting, see the User Guide. The manufacturer and Envistia LLC (dba Envistia Mall) are not responsible for any damages or losses resulting from the use of this product. Always follow proper electrical safety practices when working with electronic components. Specifications are based on manufacturer data and are subject to change without notice.