• Leonardo design – no FTDI chip, the MCU directly handles the virtual COM

• ATMEGA32U4 microcontroller, all in one USB communication no need for external FTDI

chip.

• Input power supply 7-12VDC

• ULTRA LOW POWER voltage regulators and the consumption is only few microamps,

which enables hand-held and battery powered applications.

• Li-Ion rechargeable battery power supply option with BUILD-IN on board charger, so when

you attach battery it is automatically charged and kept in this state until the other power

source (USB or external adapter) is removed and it AUTOMATICALLY will power the

board – no jumpers, no switches!

• Works both on 3.3V and on 5V which is selectable with jumper, so 3.3V and 5V shields can

be used

• UEXT connector which allow many existing modules like RF, ZIGBEE, GSM, GPS to be

connected

• Allows RTC – Real Time Clock (Q1 can be replaced by RTC).

• NOISE IMMUNE design

• the LEDs and the button BUT are on the edge of the board so there is easy access even if the

boards have shields on them

• all components are LOWER than the connectors, so the shields do not interference with

them

• mini USB connector is used -it is common and used in most cell phones, so you don't have

to buy other cables

• Original design had a flaw – the connectors were not spaced at 0.1 which made bread board

use impossible, to keep the compatibility we have the original spacing but we also added a

0.1'' connector which customer can use with bread boards (and jumper wires) saving the

hustle of soldering

• All signals on the connectors are printed on top of the board, so when you check with probe

you know exactly which port you are measuring

• 4 mount holes make board attachment easier