{"product_id":"adafruit-metro-328-with-headers","title":"Adafruit METRO 328 with Headers","description":"\u003cp\u003e\u003cem\u003e\u003cstrong\u003eThe Adafruit METRO (with headers) is an Arduino UNO R3–compatible ATmega328P board running at 16MHz with Optiboot pre-installed. Power it via micro USB or 7–9V DC, with built-in USB-serial, debugging LEDs and full shield support.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eThe Adafruit METRO Arduino-Compatible (with headers) is a fully assembled and tested microcontroller board with through-hole headers already fitted, ready to drop straight into your next project. \u003c\/p\u003e\n\u003cp\u003eThe METRO works with the Arduino IDE and is based on the ATmega328P running at 16MHz, making it shape and pin-compatible with Arduino UNO R3 shields and boards. To program it, simply select “Arduino UNO” in the Boards menu (desktop or cloud IDE).\u003c\/p\u003e\n\u003cp\u003eAt its core is an ATmega328P with 32KB of flash and 2KB of RAM, and it comes with the Optiboot bootloader pre-installed. It’s a great all-rounder for simple projects, with plenty of GPIO, analogue inputs, timers and PWM, plus hardware UART, SPI and I2C.\u003c\/p\u003e\n\u003cp\u003ePower options include 7–9V polarity-protected DC input via the barrel jack, or micro USB from any 5V USB source. The 2.1mm DC jack includes a nearby on\/off switch, and the board will automatically switch between USB and DC power.\u003c\/p\u003e\n\u003cp\u003eThe METRO provides 20 GPIO pins, including 6 analogue inputs, with 2 pins reserved for the USB-serial converter. It also includes 6 PWM outputs across three timers (one 16-bit and two 8-bit). Logic level is 5V, but you can convert it to 3.3V logic by cutting a jumper and soldering it closed.\u003c\/p\u003e\n\u003cp\u003eA built-in USB-to-serial converter allows easy programming and serial communication, and there are four indicator LEDs for quick debugging: a green power LED, two RX\/TX LEDs for UART activity, and a red LED connected to PB5. With Optiboot using only 512 bytes, you keep more space available for your own code. The board is also compatible with all Adafruit shields.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note that the capacitive touch shield is not included. \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/Wvooqnj4VqQ?si=H-PJ37IS3dkp8wFv\u0026amp;start=40\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eATmega328 microcontroller with Optiboot (UNO) Bootloader\u003c\/li\u003e\n\u003cli\u003eUSB Programming and debugging via the well-supported genuine CP2104\u003c\/li\u003e\n\u003cli\u003eInput voltage: 7-9V (a 9VDC power supply is recommended)\u003c\/li\u003e\n\u003cli\u003e5V regulator can supply peak ~800mA as long as the die temp of the regulator does not exceed 150*C\u003c\/li\u003e\n\u003cli\u003e3.3V regulator can supply peak ~150mA as long as the die temp of the regulator does not exceed 150*C\u003c\/li\u003e\n\u003cli\u003e5V logic with 3.3V compatible inputs, can be converted to 3.3V logic operation\u003c\/li\u003e\n\u003cli\u003e20 Digital I\/O Pins: 6 are also PWM outputs and 6 are also Analogue Inputs\u003c\/li\u003e\n\u003cli\u003e6-pin ICSP Header for reprogramming\u003c\/li\u003e\n\u003cli\u003e32KB Flash Memory - 0.5K for bootloader, 31.5KB available after bootloading\u003c\/li\u003e\n\u003cli\u003e16MHz Clock Speed\u003c\/li\u003e\n\u003cli\u003eCompatible with \"Classic\" and \"R3\" Shields\u003c\/li\u003e\n\u003cli\u003eAdafruit Black PCB with gold plate on pads\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e53mm x 71mm\u003c\/li\u003e\n\u003cli\u003eHeight (w\/ barrel jack): 13mm\u003c\/li\u003e\n\u003cli\u003eWeight: 19g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRevision History\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAs of August 31, 2015 we have updated the Metro's headers to be slightly taller so that they are the same height as classic 'non-SMT' headers for a better shield-fit\u003c\/li\u003e\n\u003cli\u003eAs of Oct 12, 2017 we now have fully thru-hole headers instead of SMT headers.\u003c\/li\u003e\n\u003cli\u003eAs of March 30, 2018 we now have swapped the FTDI chip for a SiLabs CP2104\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eResources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eArduino UNO R3 reference design\u003c\/li\u003e\n\u003cli\u003eHardware Files on Github\u003c\/li\u003e\n\u003cli\u003ePinout diagram\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x Adafruit METRO 328 with headers\u003c\/li\u003e\n\u003cli\u003e4x Rubber bumpers\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":46982279659692,"sku":"bla1787257367545","price":13.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/3858\/0140\/files\/adafruit-metro-328-with-headers_1.jpg?v=1787257376","url":"https:\/\/findnuvorio.com\/products\/adafruit-metro-328-with-headers","provider":"Findnuvorio","version":"1.0","type":"link"}