The Arduino Leonardo with ATmega32u4 is a microcontroller board based on the ATmega32u4. It has 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connection, a power jack, an ICSP header, and a reset button.
The Mega R3 Android Accessory Development Kit (ADK) + USB Cable is a micro-controller board base on the ATmega2560. It has a USB host interface to connect with Android based phones, base on the MAX3421e IC.It has 54 digital input/output pins (of which 15 can be used as PWM outputs); 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator; a USB connection, a power jack, an ICSP header, and a reset button.
This board is based on and fully compatible with Arduino Mega 2560 R3. It has 54 digital input/output pins (of which 14 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button
Micro controller is atmega328, operating voltage (logic level)5 v;input voltage 7-12 v;input voltage) limits) 6-20v;digital i/o pins 14 (of which 6 provide pwm output);analog input pins 8;dc current per i/o pin 40 ma;flash memory 32 kb (atmega328) of which 2 kb used by boot loader;ram 2 KB (atmega328);eeprom 1 kb (atmega328);clock speed 16 mhz.
Arduino Pro Mini board is more suitable for applications and installations where space is premium and projects are made as permanent set ups. This board is a 5 V version, powered by ATmega328. Power The Adraxx Pro Mini can be powered with an FTDI cable or breakout board connected to its six pin header, or with a regulated 5V supply on the Vcc pin.
The Arduino Uno R3 compatible ATmega328P is a micro controller board based on the ATmega328. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button.
This is a good start-up board for learning the new ST Cortex-M3 based microcontrollers STM32F103RBT6. The headers with all microcontrollers port output allows you to easily implement your own experiments and add-ons.
