The Uno is a microcontroller board based on the ATmega328P.
It has 14 digital input/output pins
(of which 6 can be used as PWM outputs), 6 analog inputs, a 16
MHz quartz crystal, a USB connection, a power jack, an ICSP
header and a reset button. It contains everything needed to
support the microcontroller; simply connect it to a computer with
a USB cable or power it with a AC-to-DC adapter or battery to
get started.. You can tinker with your UNO without worrying too much
about
doing something wrong, worst case scenario you can replace the
chip for a few dollars and start over again.
"Uno" means one in Italian and was chosen to mark the release
of Arduino Software (IDE) 1.0. The Uno board and version 1.0 of Arduino
Software
(IDE) were the reference versions of Arduino, now evolved to
newer releases. The Uno board is the first in a series of USB Arduino
boards,
and the reference model for the Arduino platform; for an
extensive list of current, past or outdated boards see the Arduino index
of boards.
Technical specs
Microcontroller | ATmega328P |
Operating Voltage | 5V |
Input Voltage (recommended) | 7-12V |
Input Voltage (limit) | 6-20V |
Digital I/O Pins | 14 (of which 6 provide PWM output) |
PWM Digital I/O Pins | 6 |
Analog Input Pins | 6 |
DC Current per I/O Pin | 20 mA |
DC Current for 3.3V Pin | 50 mA |
Flash Memory | 32 KB (ATmega328P) of which 0.5 KB used by bootloader |
SRAM | 2 KB (ATmega328P) |
EEPROM | 1 KB (ATmega328P) |
Clock Speed | 16 MHz |
Length | 68.6 mm |
Width | 53.4 mm |
Weight | 25 g |
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