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Arduino Uno SMD version


The Arduino is becoming the most popular development board. The Arduino Uno is a microcontroller board based on the ATmega328.

This is the SMD version of Arduino. They act identical to Thru Hole type except you cannot remove the microcontroller

The new Uno is the latest version after the Duemilanove, with an improved USB interface chip. Like the Duemilanove, it not only has an expanded shield header with a 3.3V reference and a RESET pin (which solves the problem of how to get to the RESET pin in a shield) AND a 500mA fuse to protect your computer's USB port, but ALSO an automatic circuit to select USB or DC power without a jumper! The Uno is pin and code-compatible with the Duemilanove, Diecimilla and older Arduinos so all your shields, libraries, code will still work. This is the SMD edition, created during the Worldwide Atmel Shortage of 2011; Atmel could not make enough of the Arduino chip in through-hole format to fulfill demand. This UNO has an SMD version of the chip instead. It acts completely identically - all code and shields work perfectly - except you cannot remove the AVR microcontroller.

Here's the specs:

Operating Voltage5V
Input Voltage (recommended)7-12V
Input Voltage (limits)6-20V
Digital I/O Pins14 (of which 6 provide PWM output)
Analog Input Pins6
DC Current per I/O Pin40 mA
DC Current for 3.3V Pin50 mA
Flash Memory32 KB (ATmega328) of which
0.5 KB used by bootloader
SRAM2 KB (ATmega328)
EEPROM1 KB (ATmega328)
Clock Speed16 MHz

It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller and it includes a USB connector, a power jack and an ICSP header for direct programming using an AVR programmer.

To use the Arduino Uno, simply connect it to a PC or a laptop using a USB cable or power it with a AC-to-DC adapter (wall wart) or you can even connect a battery.

What's new?

Unlike it's predecessor, the Arduino Uno doesn't use an FTDI chip for USB connectivity. It uses an Atmega8U2 programmed as a USB-to-serial converter.

Another change is the added power protection compared to the previous Arduinos. The Arduino Uno has a resettable polyfuse that protects your computer's USB ports from shorts and over current. If more than 500mA is applied to the USB power, the fuse will automatically trip. You don't have to replace the fuse however and that's the beauty of it. It uses a resettable fuse which means you just simply disconnect the power, wait for a second or two and reconnect again.

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This product was added to our catalog on Thursday 10 November, 2011.

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