What is a Microcontroller
Wikipedia says:
A micro-controller is a small computer on a
single integrated circuit containing a processor core, memory, and programmable
input/output peripherals
The important part for us is that a
micro-controller contains the processor (which
Arduino Uno Microcontroller Boards
Arduino Uno is a microcontroller board
based on the ATmega328P (datasheet). 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. "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extensive list of current, past or outdated boards see the Arduino index of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.
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