| Feature | Details |
| Microcontroller | ATtiny85 (8-bit AVR) |
| Clock Speed | 16.5 MHz (Internal Oscillation) |
| Flash Memory | 8 KB (approx. 6 KB available) |
| I/O Pins | 6 GPIO (2 shared with USB) |
| Interface | Onboard USB Connector (for Programming/Power) |
| Logic Level | 5V |
Product Description The Digispark ATtiny85 USB Development Board is perhaps the smallest and most affordable Arduino-compatible board on the market. Measuring roughly the size of a postage stamp, it is powered by the Atmel ATtiny85 microcontroller. Despite its tiny footprint, it includes an onboard USB connector, allowing you to plug it directly into your computer for programming and power without needing an external programmer. It is the perfect choice for minimalist IoT nodes, simple LED controllers, USB-based HID devices (like automated keyboards/mice), and projects where space is at an absolute premium.
Key Highlights
Direct USB Programming: Comes pre-loaded with the "Micronucleus" bootloader, enabling code uploads directly over USB.
HID Emulation Capability: Can be programmed to act as a USB Keyboard, Mouse, or Joystick, making it a favorite for "BadUSB" research or custom macro-keypads.
Onboard Voltage Regulator: Includes a built-in 5V regulator (78L05), allowing the board to be powered by external DC sources up to 12V via the 'VIN' pin.
Rich Peripheral Support: Despite only having 6 I/O pins, it supports I2C (Wire), SPI, PWM (on 3 pins), and Analog-to-Digital conversion (on 4 pins).
Cross-Platform Compatibility: Fully supported by the Arduino IDE on Windows, macOS, and Linux after installing the Digistump board manager.
Technical Specifications
EEPROM / SRAM: 512 Bytes / 512 Bytes
PWM Channels: 3
ADC Channels: 4
Power LED: Included
Test LED: Connected to Pin 1
Dimensions: 17.5mm x 19mm
Installation Tip from Robogears Programming the Digispark is slightly different from a standard Arduino. You must not plug the board into the USB port until after you have clicked the "Upload" button in the Arduino IDE. The software will prompt you to plug in the device within 60 seconds to initiate the bootloader. If you are on Windows, you must install the Micronucleus drivers manually to see the device in the Device Manager. Note that pins P3 and P4 are shared with the USB interface; using them in your project may interfere with USB communication while the board is plugged in.
Note: This product is the ATtiny85 USB board ONLY. Micro-USB cables are sold separately. Product images are for illustration purposes only.