THE CIRCUIT BOARD
The Arduino UNO is an electronic circuit board designed for building and programming various projects.
UNO
COMPONENTS
THE MOST IMPORTANT ONES FOR NOW
01
MICROCONTROLLER
INPUT/OUTPUT PINS
02
POWER CONNECTORS
03
The Arduino UNO microcontroller is usually a black IC (Integrated Circuit) with multiple pins.
01
Microcontroller
The Arduino UNO uses the ATmega328P microcontroller, which executes the code uploaded to it. It is an integrated circuit that acts as the brain of the board, processing inputs and controlling outputs based on the code.
In the through-hole version, it is removable, allowing for replacement if needed.
The microcontroller is just one part of the entire Arduino UNO board, which integrates other essential components to facilitate easy interfacing with external hardware.
02
Onboard LED
& Pin 13
The Arduino UNO has an onboard LED connected to digital pin 13. This LED is often used for simple tests and debugging, such as in the basic "Blink" sketch, which is usually the first program users run to verify that their board is working correctly.
PIN 13
Pin 13 is a digital I/O pin on the Arduino UNO. It has a built-in LED connected to it, which provides a convenient visual indicator for digital signals.
When the pin is set to HIGH , the LED turns on; when the pin is set to LOW , the LED turns off. This pin can also be used for other digital I/O purposes in various projects.
THE ONBOARD LED AS AN INDICATOR
The onboard LED is a useful tool for visual debugging , allowing you to see the state of pin 13 at a glance without needing an external LED and resistor.
PIN 13 HAS MULTIPLE FUNCTIONS
While pin 13 is commonly used with the onboard LED, it can also be used for other digital input or output tasks. Be mindful of this dual usage when designing your projects.
By understanding the function and usage of the main LED and pin 13, you can effectively utilize this feature for testing and debugging in your Arduino projects​ (Arduino Docs)​​.
01
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Mobile Optimised design
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Mobile Optimised design
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Mobile Optimised design
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Mobile Optimised design
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Mobile Optimised design
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