Keyestudio Mega 2560 R3 is a microcontroller board based on the ATMEGA2560-16AU , fully compatible with ARDUINO MEGA 2560 REV3.
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, 2 ICSP headers, and a reset button.
It contains everything needed to support the microcontroller. With its bootloader, program can be downloaded directly with USB and you don’t need to use other external programmer.
The Arduino Due is an open source precise microcontroller board based on the Atmel SAM3X8E ARM Cortex-M3 CPU. It is the newcomer and 1st Arduino board based on a 32-bit ARM core microcontroller. It adds new features and improve all the standard Arduino functionalities.
Operating Voltage: 3.3V
Input Voltage (recommended): 7-12V
Input Voltage (limits): 6-16V
Digital I/O Pins: 54 (of which 12 provide PWM output)
Silent, energy efficient Quad-Core 64-bit Broadcom 2711, Cortex A72 processor :Raspberry pi run silently and saves more energy compared to other computers as it uses 20% less power compared to its previous versions.
RAM: 2 GB
USB 3: New Pi computer has an upgraded USB capacity with two more USB 3 port to with 10 times more transfer speed.
Fast networking: Raspberry Pi boards have gigabyte Ethernet, in addition to onboard wireless networking and Bluetooth.
Power: Micro USB-B is upgraded to Micro USB-C power connector which supports extra 500mA of current.
Dual Screen:Type-A HDMI cable is changed to pair of type-D HDMI connectors to enable dual monitor excess.
Arduino UNO has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with an AC-to-DC adapter or battery to get started