The Digispark is probably the most compact and smallest microcontroller currently available. The Digispark with ATTiny85 has a USB connector directly on board and can be connected directly to a USB port without any additional cable. The integrated ATTiny85 is powered directly via the USB connector. In addition, the Digispark has 6 freely programmable GPIO connectors that can be programmed with the well-known Arduino IDE programming environment. There is 8kB of memory available for your own programs. Besides the 3 additional pins on the board, which can be used for an external power supply, the ATTiny85 supports full SPI and I2C interfaces. Particularities On-board USB for easy programming By plugging directly into the PC or with a common USB extension cable. High performance and low power 8-bit microcontroller chip is perfect for any kind of projects. 8kB in-system programmable flash memory for program storage. Compatible and reliable connection. Technical specifications Dimensions 20 x 19 x 6mm (0.8x0.7x0.2in) Operating voltage 2.7V - 5.5V External supply voltage 6V - 12V (Vin -Pin) Operating temperatur -40 ° C to 85 ° C Input/output pin 6 multi -purpose pencils (analogous, digital) Interface Spi, i2c Storage space 8kb Low energy consumption Active mode: 1MHz-1.8V, 300UA power-down mode: 0.1UA at 1.8V