Circuit Diagram
In the circuit diagram, we used one 330-ohm resistor in series with the LED. This resistor is also called a current-limiting resistor. The Anode of the LED (the longer pin) is connected to one end of the resistor, and the cathode (the shorter pin) is connected to the ground. The other end of the resistor is connected to the Arduino pin. A step-by-step explanation is as follows:
- LED Connections: Connect the LED to the breadboard. The LED has two legs, the longer of which is the anode (positive) and the shorter of which is the cathode (negative).
- Resistor Connection: Insert one end of the resistor into the same row of the breadboard as the LED’s Anode. The resistor’s other end should be connected to the Arduino’s digital output pin.
- Ground (GND) Connection: Connect a jumper wire from the same row as the LED’s cathode to any Arduino board GND (Ground) pin. This connects the circuit to the ground of the Arduino.
The circuit is now complete. Here’s how it works:
When you upload a simple Arduino program that controls the LED, the microcontroller on the Arduino board executes the program, and the LED will blink according to the code you wrote.
LED Blinking Using Arduino
We will interface an LED (light-emitting diode) to the Arduino UNO board. An LED is a simple diode that emits light in a forward bias. We will write an LED-blinking program on the Arduino IDE and download it to the microcontroller board. The program simply turns ON and OFF LED with some delay between them.
Table of Content
- Blinking an LED
- Working procedure
- Components Required
- Arduino Code
- Deployment Using Arduino IDE
- Circuit Diagram
- Applications