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What is arduino uno? know it before start working on it

Before start working with arduino, first we have to know what is arduino uno ? Arduino is a microcontroller platform by using that we can captured the imagination of electronics enthusiasts. It is very easy to use. As we know it’s open source nature make it a great choice for anyone wanting to build electronic projects.

 So start exploring some features of Arduino boards. It has low-cost and very easy to use technology to create microcontroller based projects. With a little knowledge on programming, we can make our Arduino projects. We can work on all sorts of things which can be imagine. We can do small thing like controlling lights to managing the power on a solar energy system.

So finding the answer of what is arduino uno? We should know that Arduino is a small microcontroller board. And it come with a universal serial bus (USB) plug to connect to your computer. Except that it has number of input and output ports. Those can be wired to external electronics such as motors, relays, light sensors, laser diodes, loudspeakers, microphones, and more. It can either be powered through the USB connection from the computer, from a 9 V battery, or from a power supply. It can easily controlled by the computer. It can also programmed by the computer with it specified free Ardiuno sowftware . After successfully programmed, disconnect it from computer and use it to work independently.

As we Know the heart of Arduino is a microcontroller. A microcontroller itself is a little computer on a chip. Inputs can read both digital and analog types. For that reason it opens up the opportunity of connecting many different types of sensor for light, temperature, sound, and more. Outputs can also be analog or digital. So, we can set a pin to be on or off (0 volts for off or 5 volts for on) and this can LEDs on and off directly. We can use the output to control higher power devices such as motors also. It can also provide an analog output voltage. The microcontroller on an Arduino board is the 28-pin chip fitted into a socket at the center of the board. This single chip contains the memory processor and all the electronics for the input/output pins.

What is arduino

Analog Inputs

For Arduino UNO has six pins labeled as Analog In A0 to A5. Which can be used to measure the voltage connected to them, so that the value can be used in a sketch. Note that it measure a voltage and not a current. Only a tiny current will ever flow into them and down to ground because they have a very large internal resistance. That is, the pin having a large internal resistance only allows a tiny current to flow into the pin.

Digital Connections

For Arduino UNO has 13 pins for Digital connection and we can see it to the top connector and start on the right-hand side. Here we find pins labeled Digital 0 to 13. These can be used as either inputs or outputs.


So as we know microcontroller is a brain of Arduino, the microcontroller chip itself is the black rectangular device with 28 pins. The 28-pin microcontroller chip used on the Arduino Uno board is the ATmega328.

Hope above discussion clear your idea on what is arduino uno ?

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Subham Dutta

Subham Dutta

Hi myself Subham Dutta, having 15+ years experience in filed of Engineering. I love to teach and try to build foundation of students. Try to make them imagine what they learn.

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