METRO Development Boards with ATmega328

Easy to use and developer friendly, Adafruit's METRO line of development boards is the culmination of years of using AVRs

Image of Adafruit's METRO Development Boards with ATmega328Adafruit’s METRO boards are available with the Arduino UNO R3 pinout with and without headers, or as a breadboard compatible mini size. At the heart is an ATmega328 with 32 KB of Flash and 2 KB of RAM, running at 16 MHz and preloaded with the Optiboot bootloader. The METRO has a hardware USB-to-Serial converter that can be used by any computer to listen and send data to the METRO, and can also be used to launch and update code via the bootloader.

The full-sized version has 19 GPIO pins and the mini has 20 GPIO, of which six are analog in as well, and two of which are reserved for the USB-Serial converter. There are also six PWMs available on three timers (one 16-bit; two x 8-bit). There is a hardware SPI port, hardware I2C port, and hardware UART-to-USB. The logic level is 5 V but by cutting and soldering closed a jumper, it is easily converted to 3.3 V logic. Adafruit’s METRO boards also provide four indicator LEDs for easy debugging: one green power LED, two RX/TX LEDs for the UART, and a red LED connected to pin PB5 / digital #13.

Features
  • ATmega328 microcontroller with Optiboot bootloader
  • Selectable 3.3 V or 5 V logic
  • Six analog inputs
  • R3 shield compatible
  • 32 k Flash memory
  • 16 MHz clock speed
  • Hardware USB-to-Serial converter
  • Onboard voltage regulation and polarity protection
  • Micro USB connector for programming and power
  • Easy-to-see placement of indicator LEDs
  • Full size METRO input voltage: 7 VDC to 9 VDC with 2.1 mm DC input jack and power switch
  • METRO mini input voltage: 6 VDC to 16 VDC on VIN pin

METRO Development Boards with ATmega328

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
METRO MINI ATMEGA328/CP21042590METRO MINI ATMEGA328/CP21041009 - ImmediateView Details
METRO ATMEGA328 NO HDR EVAL BRD2466METRO ATMEGA328 NO HDR EVAL BRD11 - ImmediateView Details
METRO ATMEGA328 W/HDR EVAL BRD2488METRO ATMEGA328 W/HDR EVAL BRD77 - ImmediateView Details
Published: 2015-10-30