#3 Basics of Arduino Board

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"Arduino Uno"

This is 3rd post on Arduino tutorial.

If you want the list of posts click here.

ARDUINO UNO :-

• Now all the tutorials are explained on Arduino UNO, you can use any other board there is no big difference other then having little extra pins [about which you will understand soon].
• Arduino UNO is a 

Microcontroller having ATmega328 

Operating Voltage is 5V

Input Voltage (recommended)  is 7-12V

Input Voltage (limits) is 6-20V

Digital I/O Pins  - 14 (of which 6 provide PWM output)

Analog Input Pins - 6

DC Current per I/O Pin 40 mA

DC Current for 3.3V Pin 50 mA

Flash Memory 32 KB (ATmega328) of which 0.5 KB used by bootloader

Clock Speed 16 MHz [Crystal frequency]

Length 68.6 mm

Width 53.4 mm

Weight 25 g

• Refer the following pic :-

1.USB Port :- This is where you can connect Arduino to the computer. This port provides a voltage from your computer to board, Arduino works perfectly on this voltage. This port is important because the code that we write is burned through this USB port. [one of the many methods to burn code & the easiest].

2.Power Port [Through Adapter pin] :- There is a circular port at bottom of the board where you can connect a adapter [230V AC to 9V DC]. We can use this when you find the code you burned and the circuit works fine. This makes your project usable from any AC source without a PC or Laptop. [This is really a great way of powering arduino when you are done with the project]

3.LED's :-

1. On/Off - indicates whether your Arduino is On/Off i.e. whether power supply is proper or not.
2. Tx & Rx :- blinks when we transmit or receive data [Serial communication of Arduino with other devices]

4.Reset Button :- when we press this button the Arduino restarts and the code is again executed from start. we use this to reset the system based on the board and also if anything goes wrong.

5. Power Block :-  This block has 6 pin holes, 

1. GND [Ground pins] :- Two pins for ground, one more is present besides the 13th digital pin. So this 3 GND pins are used to make a common reference for all the sources and arduino board plus to sink a large amount of current.
2. 5V, 3.3V, Vin :- This pins provides an voltage of 5V, 3.3V & Vin produces 5V if you connect Arduino using USB [Basically Vin produces the same voltage as we give it to Arduino].
3. RESET PIN :- when we apply a 0V here the board is reset. [Useful to reset the board through a program i.e. software reset]

Analog Pins & Digital Pins are discussed in next Tutorial.

Visit the next post on 'Digital Pins of Arduino UNO'.

click here.

Comments are welcomed :)

Thank You.