A compact, USB-ready microcontroller board based on the ATTiny85, designed for low-cost, space-efficient embedded applications. Compatible with the Arduino IDE, it offers essential I/O capabilities and supports popular communication protocols, making it perfect for hobbyists, educators, and rapid prototyping.

Specifications

• Microcontroller: ATTiny85
• Operating Voltage: 5V
• Input Voltage: 5V via USB or 7–35V via external source (auto selection)
• Flash Memory: 8KB (approx. 6KB usable after bootloader)
• SRAM: 512 bytes
• EEPROM: 512 bytes
• Clock Speed: 16.5 MHz (via internal PLL)
• Digital I/O Pins: 6 (2 used for USB if active communication)
• PWM Pins: 3 (Pins 0, 1, 4)
• Analog Input Pins: 4 (Pins 2, 3, 4, 5)
• Communication: I2C and SPI via USI
• USB Interface: Built-in USB (software-based, no native USB hardware)
• Power Regulation: Onboard 500mA 5V regulator
• Board Dimensions: Approx. 26mm × 18.8mm

Features

• Arduino IDE Support: Compatible with IDE 1.0+ (Windows, macOS, Linux)
• Plug-and-Play USB Programming: No external programmer required
• Compact Form Factor: Ideal for space-constrained projects
• Breadboard Adaptable: Can be configured with male or female headers
• Status LEDs: Power LED and test/status LED on Pin 0
• Bootloader: Micronucleus for USB-based programming
• Low Power Consumption: Approx. 5mA at 5V

NOTE: If the board doesn't connect via USB, the IC should probably be missing the Digispark bootloader. Follow the video to burn the bootloader correctly.