The Digispark is available in two variants- with USB Connector and without USB Connector. This board comes without the USB Connector is is suitable for projects which require a small PCB. It can be programmed on the Arduino IDE with Arduino compatible code. It is perfect for use in projects where the Arduino UNO/Nano are too big and minimal IO pins and functionality are required.

Technical Specification:

• Onboard: 5V regulator
• Flash Memory: 8K
  
• Size: 26m*18mm*5mm (L*W*H)
  

Features:

• Support for the Arduino IDE 1.0 + (OSX/Windows/Linux)
• Built – in USB and serial was debugging)
• The I2C and SPI (vis USI)
• The Power LED and the Test/Status LEDs
• Status and Power LEDs onboard

Applications:

• It is perfect for use in projects where the Arduino UNO/Nano are too big and minimal IO pins and functionality are required.