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DFRobot Romeo V2

By Sam Brown / Mar 19, 2020

DFRobot Romeo V2

DFRobot’s Romeo is the heart of a robot on a single board. Many the starter robotics project has been launched around the Arduino, but inevitably, you have to turn around and build on an H-bridge or similar add-on to let the power-sipping controller drive the power-hungry motors that will move your robot around the world. The Romeo builds that power-control into the board, along with beefy screw-post terminals for attaching motors and power supplies with fatter wires for carrying heavier power. Thicker copper traces on the board for these high-power and ground circuits complete the picture.

The Romeo board gives you the choice of how you want to wire it: There’s a standard Arduino Uno compatible pinout, handy if you want to stack shields on top. All the connectors, digital and analog, also come with 3-pin connectors, making it easier to wire in most common sensors that need power, ground, and signal.

The chip at the heart of the Romeo V2, the ATmega 32U4, feels a bit old fashioned compared to many microcontrollers now on the market. But I see something to love here: The Arduino Leonardo, built around the ATmega 32U4 was Arduino’s first foray into a chip with built-in USB control. Indeed, the Romeo shows up to the Arduino editor as a Leonardo. Cross one more chore off the list of things you’ll have to do to get your robot up and running. You don’t need to add a new board to the ones the editor knows how to program.

The libraries for making the ATmega32U4 pretend to be a keyboard or attach to a computer as a USB peripheral are some of the most mature in the Arduino ecosystem. This makes the Romeo a good controller for computer connected animatronics, or really anything else you want to plug into a computer that needs to control higher powered devices.

Specs
Romeo V2 DFRobot
Type:Microcontroller
Price:$35
Dimensions:3.5"×3.3"
Software:Arduino
Clock Speed:16MHz
Main Processor:8-bit ATmega32U4
Memory:1MB RAM, 2MB Flash, SD Card Slot
I/O Pins (Digital):20
I/O Pins (Analog):6 PWM, 12 ADC
Wi-Fi:No (Add-on module available)
Bluetooth:No (Add-on module available)
Video:No
Ethernet:No
Input Voltage:5V
Battery Charging:No
Operating Voltage:3.3V; Motor power 5V(2A)

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Why To Buy

You want a board made with robotics in mind: Just add motors, power supply, and sensors.

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