Romi 32U4 Control Board for Romi Chassis

Product Code:
3544
£47.40 £39.50

The Romi 32U4 Control Board turns the Romi chassis into a programmable robot based on the Arduino-compatible ATmega32U4 MCU. Its features include integrated dual motor drivers, a versatile power circuit, and inertial sensors, as well as connections for quadrature encoders and an optional LCD.

The board also has the ability to interface with an added Raspberry Pi, making the foundation for a complete Raspberry Pi-controlled Romi robot.

Romi 32U4 Control Board. Romi 32U4 Control Board, top view. Romi 32U4 Control Board, shown with included hardware. Romi 32U4 Control Board with LCD on a Romi chassis. Romi 32U4 Control Board with Raspberry Pi on a Romi chassis. Romi 32U4 Control Board on a Romi chassis, top view. Romi 32U4 Control Board with LCD on a Romi chassis, top view. Pinout diagram of the Romi 32U4 Control Board (ATmega32U4 pinout, peripherals, and board power control). Pinout diagram of the Romi 32U4 Control Board (Raspberry Pi pinout, peripherals, and level shifters). Power distribution diagram of the Romi 32U4 Control Board.
Romi 32U4 Control Board.

The Romi 32U4 Control Board is designed to be assembled with a Romi chassis to create a capable integrated robot platform that can easily be programmed and customized.

Like our A-Star 32U4 programmable controllers, the Romi 32U4 Control Board is built around a USB-enabled ATmega32U4 AVR microcontroller from Microchip (formerly Atmel), and it ships preloaded with an Arduino-compatible bootloader. The control board features two H-bridge motor drivers and is designed to connect to a Romi Encoder Pair Kit (available separately) to allow closed-loop motor control. It also includes a powerful 5 V switching step-down regulator that can supply up to 2 A continuously, along with a versatile power switching and distribution circuit. A 3-axis accelerometer and gyro enable a Romi 32U4 robot to make inertial measurements, estimate its orientation, and detect external forces. Three on-board pushbuttons offer a convenient interface for user input, while indicator LEDs, a buzzer, and a connector for an optional LCD allow the robot to provide feedback.

Dimensions:

Size: 4.4″ × 3.3″ × 0.38″1

Weight: 35 g1

Current rating: 5 A2
Processor: ATmega32U4 @ 16 MHz
RAM size: 2560 bytes
Program memory size: 32 Kbytes3
Motor driver: DRV8838
Motor channels: 2
Minimum operating voltage: 2.5 V
Maximum operating voltage: 10.8 V
Continuous output current per channel: 1.8 A
Logic voltage: 5 V
Reverse voltage protection?: Y
External programmer required?: N

Identifying markings

PCB dev codes: rom04a
Other PCB markings: 0J10217

Notes:

1 Without included hardware.

2 This is the rating for the battery power switching circuit and limits the current available at VSW.

3 Note that 4 KB of the MCU's 32 KB of flash memory is used by the pre-installed USB bootloader. All 32 KB is available when programming via the ISP header rather than the bootloader.

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