The new version of DFRduino Mega2560 has improved the VIN power supply circuit by changing the easily overheat LDO to DC-DC circuit for ensuring safety and reliability in long-term use. In addition to optimizing the overheating issue, it offers a wider input voltage range. What’s more, DFRduino Mega2560 can work steadily even when only powered by a 3.7V lithium battery. DFRduino Mega2560 is an ATmega2560-based microcontroller that provides full compatibility with "Arduino MEGA2560“. It features 54 digital I/O ports, 16 analog signal input ports, 4 UARTs(hardware serial ports), and a 16MHz crystal oscillator. The board comes with a bootloader that enables users to download programs directly via a USB. You can simply power it with a USB cable or a standard adapter or use a battery as external power. Mega 2560 has 256KB FLASH, two times of Mega1280, which could offer a larger create space for your projects. DFRobot Arduino Compatible Microcontrollers Series Name DFRduino UNO DFRobot Leonardo DFRobot Mega 2560 Romeo V2 Romeo SKU DFR0216 DFR0221 DFR0191 DFR0225 DFR0004 Microcontroller ATmega328p ATmega32u4 ATmega2560 ATmega32U4 Atmega328 Working voltage 5V 5V 5V 5V 5V CPU Frequency 16MHz 16MHz 16MHz 16MHz 16MHz TIO ports / PWM 6 / 14 7 / 20 54 / 15 20 / 7 14 / 6 Analog inputs 6 12 16 12 8 UART 1 2 4 2 1 I2C 1 1 2 3 3 SPI 1 1 1 1 1 Interrupt pins 2 2 2 2 2 EEPROM[KB] 1 1 4 1 1 Flash[KB] 32 32 256 32 32 SRAM[KB] 2 2.5 8 2.5 2 USB A-B USB cable micro USB cable A-B USB cable micro USB cable A-B USB cable Dimension 75*55*15mm 75*55*15mm 100*53*15mm 89*84*14mm 90*80*14mm Vin 7-12V 7-12V 7-12V 7-12V 7-12V Price $19.9 $19.9 $24.9 $34.95 $29.5 Weight（g） 45 50 70 80 80 IDE version Arduino 1.0 and above Arduino 1.0 and above Arduino 1.0 and above Arduino 1.0 and above Arduino 1.0 and above Feature DFRduino UNO is fully compatible with Arduino UNO R3, suitable for Arduino beginners and hobbyists DFRobot Leonardo is a low-cost controller, integrated with Xbee and SPI. Suitable for low cost and communication demand of hobbyists DFRduino Mega has 54 digital pins and 16 analog pins, 4 UART channels. Suitable for demands of vast sensors Use ATmega32u4, 2 serial ports. Integrated with Xbee socket and motor drivers Microcontroller with motor driver, communication ports, IO expansion ports, it can be used as the main controller of robots
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