Adafruit has unveiled a new addition to their range in the form of the Adafruit Metro Mini 328 that has been designed dot provide a USB-to-Serial connection.
The Adafruit Metro Mini 328 takes the form of a breadboard-friendly development board that can be programmed using the Arduino IDE.
Features include :
– 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 Mini with 6-16V polarity protected on the Vin pin, or plug the micro USB connector to any 5V USB source.
– 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 on the bottom, you can easily convert it to 3.3V logic
– 5V onboard regulator with 150mA out, 3.3V 50mA available via FTDI chip
– USB to Serial converter, there’s a genuine FTDI 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 top 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 / digital #13
– Easy reprogramming, comes pre-loaded with the Optiboot bootloader
– Beautiful styling by PaintYourDragon and Bruce Yan, in Adafruit Black with gold plated pads.
Adafruit explains : “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 if you want to have USB-to-Serial built in, we reach for an Adafruit METRO Mini.”