Femtoduino Specifications

Femtoduino Pins
  1. Femtoduino is an ultrasmall libre Arduino compatible board.
  2. ATMEGA 328p (QFN32 version) Processor
  3. exact same computing power of the Arduino Duemilanove or UNO.
  4. ultra light (2g)
  5. ultrasmall (20.7×15.2 mm) (.81″  x .6″)
  6. 0.05″ connectors
  7. 0402 components
  8. removing everything not strictly necessary
Voltage:
  1. VIN connects to the Low Dropout (LDO) Regulator. Accepts 10V Input Voltage on this pin, outputs 5V
  2. VCC accepts unregulated voltage. DO NOT EXCEED 5V on this pin!
  3. Operates at a minimum of 3.3V, (though you may need 5V while loading sketches).

 see also: Femtoduino Shield Specifications