CHAPTER 2: OVERVIEW OF AN ARDUINO UNO BOARD
The board we will be using is an Arduino Uno board, which is the most popular Arduino board for beginners. As seen in the figure below, it consists of
13 Digital Input/Output pins (pin 3, 5, 6, 9, 10, 11 can be configured for Pulse Width Modulation (PWM) output)
An ATMEGA 328 Micro Controller Chip
6 Analog-to-Digital Converter (ADC) Input pins
Power and auxiliary pins
7-12V DC Input
Figure: Arduino Uno layout
The components will be placed on the breadboard. So knowing the layout of the breadboard is also necessary. The figure below shows how the holes on the breadboard are inter-linked.
Figure: Bread Board layout
The rows and columns of the holes represented by the green lines are connected to each other accordingly throughout the line. The horizontal green lines above are usually used as power bus and are color coded to represent the Power and Ground lines.
The prototyping area is the place where we will be placing our components and the vertical green lines represent this area. For example, hole 5A and hole 5E are interconnected, but hole 5E and hole 5F are not connected. So we have to be careful not to connect power and ground bus to same interconnected rows to avoid short-circuit.
If you want to add something interesting or want to point out any errors on this article, please feel free to comment below.
* Programs used to control Arduino are called sketches
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