Overview
The Digispark ATtiny85 is an MCU development board based on the Atmel ATtiny85. It is similar to the Arduino line, only cheaper, smaller, and a bit less powerful. With a whole host of shields to extend its functionality and the ability to use the familiar Arduino IDE, the Digispark is a great way to jump into electronics, or perfect for when an Arduino is too big or too much.
Key Features
Direct USB Plug: No cables required! The PCB has USB contacts built-in for instant programming and power.
HID Emulation: Can act as a USB Keyboard, Mouse, or Joystick—popular for “Macro Pads” or automated script injection.
Arduino IDE Support: Easy to program using the standard Arduino environment (with the Digispark board manager).
6 I/O Pins: Includes 2 pins used for USB (only if your program communicates over USB), leaving 4 to 6 usable pins.
Onboard Regulator: Built-in 5V regulator allows you to power it with up to 12V DC via the “VIN” pin.
Technical Specifications
| Feature | Specification |
| Microcontroller | ATtiny85 (8-bit MCU) |
| Clock Speed | 16.5 MHz (Internal Osc) |
| Flash Memory | 8 KB (Approx. 6KB after bootloader) |
| I/O Pins | 6 Pins (I2C, SPI, PWM, ADC) |
| Interfaces | I2C and SPI (via USI) |
| Power Options | USB 5V or External 7V–12V (VIN) |
| Status LEDs | Power LED and Test/Status LED (Pin 1) |
| Dimensions | 25mm x 18mm |
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