Original stock MEGA2560 R3 development board, new version ATMEGA16U2

Product Descriptions:

MEGA2560 2012 R3 version is a new version of the MEGA series controller, with the following differences from the 2011 version:

1. Replace the 2011 version of ATMEGA8U2 with the ATMEGA16U2 chip, doubling the ISP FLASH capacity for more powerful feature expansion, which is required for development. In addition to providing traditional USB to serial port functionality, ATMEGA16U2 also allows users to program and define other functions, such as configuring the USB port as a mouse, keyboard, game joystick, camera, etc. Of course, these applications still need to be announced by the Duino team for specific implementation plans.

On the basis of the 2011 version, SDA and SCL (located on the left side of AREF) have been added to the external interface. The IOREF interface can provide Shield with a voltage reference. And in order to consider compatibility with future series products, reserve a port on the left side of IOREF.

The RESET circuit has been improved compared to the 2011 version. Prevent accidental reset of RESET, the RESET circuit is more stable.

Mega Introduction:

Mega is a microcontroller development board with ATmega2560 as its core. It has 54 sets of digital I/O input/output terminals (14 of which can be used for PWM output), 16 sets of analog input terminals, 4 sets of UART (hardware serial ports), and uses a 16 MHz crystal oscillator. Due to the presence of a bootloader, programs can be downloaded directly through USB without the need for other external programmers. The power supply can be directly provided by USB, or an AC-DC adapter and battery can be used as external power supply.

Due to the open source code and the use of Java concepts (cross platform) in the C language development environment, rduino's peripheral modules and applications have grown rapidly. The main reason that attracts artists to use rduino is the ability to quickly communicate with software such as Flash or Processing using rduino language to create multimedia interactive works. The rduino development IDE interface is based on the principle of open source code, which allows you to download and use it for free for special topic production, school teaching, motor control, interactive works, and more.

Power supply design

Mega's power supply system has two options: direct USB power supply or external power supply. The selection of power supply will automatically switch. External power supply can be selected from AC to DC adapter or battery. The maximum voltage range of this control board is 6V~12V. However, if the provided voltage is less than 6V, the I/O port may not be able to provide 5V voltage, resulting in instability; If the voltage provided is greater than 12V, the voltage regulator may experience overheating protection and may even damage MEGA. Therefore, the recommended operating power supply is 6.5-12V, and the recommended power supply is 7V or 12V.

Summary