Adafruit METRO 328 without Headers - ATmega328

PRODUCT ID: 2466
$19.50
QTY DISCOUNT
1-9$19.50
10-99$17.55
100+$15.60
  • Description

    Description-

    We sure love the ATmega328 here at Adafruit, and we use them a lot for our own projects. The processor has plenty of GPIO, Analog inputs, hardware UART SPI and I2C, timers and PWM galore - just enough for most simple projects. When we need to go small, we use a Pro Trinket 3V or 5V, but when size isn't as much of a concern, and a USB-serial converter is required, we reach for an Adafruit METRO.

    METRO is the culmination of years of playing with AVRs: we wanted to make a development board that is easy to use and is hacker friendly.

    • ATmega328 brains - This popular chip has 32KB of flash (1/2 K is reserved for the bootloader), 2KB of RAM, clocked at 16MHz
    • Power the METRO with 7-9V polarity protected DC or the micro USB connector to any 5V USB source. The 2.1mm DC jack has an on/off switch next to it so you can turn off your setup easily. The METRO will automagically switch between USB and DC.
    • METRO has 20 GPIO pins, 6 of which are Analog in as well, and 2 of which are reserved for the USB-serial converter. There's also 6 PWMs available on 3 timers (1 x 16-bit, 2 x 8-bit). There's a hardware SPI port, hardware I2C port and hardware UART to USB.
    • GPIO Logic level is 5V but by cutting and soldering closed a jumper, you can easily convert it to 3.3V logic
    • USB to Serial converter, there's a hardware USB to Serial converter that can be used by any computer to listen/send data to the METRO, and can also be used to launch and update code via the bootloader
    • Four indicator LEDs, on the front edge of the PCB, for easy debugging. One green power LED, two RX/TX LEDs for the UART, and a red LED connected to pin PB5
    • Easy reprogramming, comes pre-loaded with the Optiboot bootloader, which is supported by avrdude and only uses 512 bytes.
    • Beautiful styling by PaintYourDragon and Bruce Yan, in Adafruit Black with gold plated pads.
    • Works with all Adafruit designed shields!

    This version of the METRO 328 comes as a fully assembled and tested development board but without any headers attached. We do include some through-hole headers that you can solder on if you like, or you can solder wires or header directly to the breakout pads. We also include 4 rubber bumpers to keep it from slipping off your desk.

    Mac & Windows People! Don't forget to grab & install the FTDI VCP drivers from FTDI to make the COM/Serial port show up right! The default drivers may not support this FTDI chip!

    //www.youtube.com/embed/vmFGIkRKjsk?start=810

  • Technical Details

    Technical Details+

    Detailed specifications:

    • ATmega328 microcontroller with Optiboot (UNO) Bootloader
    • USB Programming and debugging via the well-supported genuine FTDI FT231X
    • Input voltage: 7-9V (a 9VDC power supply is recommended)
    • 5V regulator can supply peak ~800mA as long as the die temp of the regulator does not exceed 150*C
    • 3.3V regulator can supply peak ~150mA as long as the die temp of the regulator does not exceed 150*C
    • 5V logic with 3.3V compatible inputs, can be converted to 3.3V logic operation
    • 20 Digital I/O Pins: 6 are also PWM outputs and 6 are also Analog Inputs
    • 6-pin ICSP Header for reprogramming
    • 32KB Flash Memory - 0.5K for bootloader, 31.5KB available after bootloading
    • 16MHz Clock Speed
    • Compatible with "Classic" and "R3" Shields
    • Adafruit Black PCB with gold plate on pads
    • 53mm x 68.5mm / 2.1" x 2.7"
    • Height (w/ barrel jack): 13mm / 0.5"
    • Weight: 16.5g
    • Derivative of "Arduino UNO R3 Reference design" 
    • Open source hardware files on github!
    • Fritzing object in the Adafruit Fritzing Library
    • ATmega328P product page
  • Learn

    Learn+

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