While it is true, a led It is defined as a light-emitting diode device or a particular type of diode that provides light when passed through by an electric current. Thus, the union of two semiconductor materials with different doping. Whereby, typically used as indicators in lighting and many devices.
On the other hand, when usually use LED lights for improve the functioning of the systems and achieve the desired result. Taking into account that, fortunately, Arduino is an open source platform that allows extend its functionalities thanks to the connection of other elements (such as, for example, an LED).
Now, at the moment of , it is essential to know how can you turn these on and off from scratch so that it can show correct operation. For this reason, in this post, we will teach you each step to follow to turn an LED light on and off with Arduinolike The best kits out there to use RGB LED lights.
Learn step by step how to turn a LED light on and off with Arduino
Although many fans of suppose to use, turn an LED light on and off in your projects built with such boards, it is difficult. In fact, it is not complicated and therefore, without the need for advanced knowledge, anyone can do it. However, in order to do it correctly, It is essential to know each step to follow when implementing this process.
Therefore, below, we explain step by step what you have to do to turn an LED on and/or off from scratch with Arduino:
Choose the LED to use
Currently on the market there are a wide range of LEDs available (both the most common of small power as well as those of great power). So, the users They have numerous alternatives to choose from.depending on your requirements to build the project.
In this sense, if you go for a high power LEDNaturally, these require additional power stages or drivers when powering them from an automaton or arduino board. While, if you choose a small power LED, everything will be simpler and you will even be able to save more money. Considering that the most common are the traditional 3mm or 5mm LED packages.
Apart from that, it is also possible to get Transparent LEDs and opaque LEDs. Which are basically characterized by their ability to ignite. Well, opaque LEDs have been designed to ignite by themselves and instead the transparent LEDs They are designed to illuminate a certain area.
On the other hand, other types of leds that are found, are those that have different angles. Whereas, those who have wider angles, are characterized by illuminating a large area and concentrating a lower amount of light forwards. While, the LEDs with a smaller illumination anglehave a more closed beam and only concentrate the light in a narrow area.
Calculate the value of the resistor
In order to carry out a quality assembly, it is necessary to use a resistor that limit the amount of current flowing through the diode. Otherwise, a large current may be generated which will destroy the diode.
Apart from that, if the resistor is not placed, the system will only be able to have two unusual states:
- The LED does not turn onif you feed one lower tension to forward bias voltage (You).
- The LED breaksif you feed one top tension a You.
However, it is also essential calculate the value of the resistor needed to power an LED. To do it correctly, it is ideal to connect three parameters that are: The supply voltage (Vdc), the forward bias voltage of the LED (You) and the rated current of the LED (in).
After that, you can compute the value of the resistor which, luckily, is easy. Whereas, the voltage supported by the LED is the difference between the applied voltage and the forward bias voltage of the LED. Additionally, it must with the value of the nominal intensity of LED and in this way, the value of the resulting resistance will be obtained.
At this point, you should take into account that commercial resistances usually have normalized values and because of this, you will surely not find a resistor with the exact digit that you have obtained after the calculation. Therefore, in this case, we recommend choose the normalized resistance greater than the calculated value in order to ensure that the current is less than the nominal.
Assemble the circuit
Third, it’s time to make electrical connection. To do this, start by placing the previously calculated resistor in series with the LED and then, connect the anode to pin 13 of the Arduino board you prefer to use. While, the cathode of said LED will have to place it on the ground or in “ground”.
In addition to that, for assembly, a Protoboard is used, which refers to a board that has holes electrically connected to each other, following line patterns. Through this, it is possible to add electronic components and cables for the construction of prototypes of electronic circuits and similar systems.
In such a way, the breadboard will help to insert the LED and install the circuit by means of wires. With this, all that remains is to develop the code in the in order to establish the correct operation of the LED light to turn on and off with Arduino.
Use the Arduino IDE to code the circuit
Finally, you have to make use of the Arduino IDE to fix the correct operation of your new system. So start with access the “Tools” drop-down menu and in the option “License plate”proceed to select the card Arduino that you are using (, Mega, etc).
Also, in Port”it is necessary to choose the USB port in which the board will be connected Arduino with the computer. Once you carry out the steps mentioned above, you need to take into account other important factors to achieve coding the circuit as it should.
Among these factors are:
- Declare the necessary variables. Generally, constant type variables are used, which are those that do not change their value after being defined. To do this, use the “const” command and if it is an integer, use the “int” command as well. Likewise, you have to establish its name and assign it the value 13 in the code (if the anode was connected to pin 13 of the board).
- Defines the type of variable. Either “input” or “output”through “void setup()” and to find out what that command contains, use the curly brace symbols ({,}). Assessing that, within the bracket, it can be declared that the variable LED it’s out with the command “pinMode(LED, OUTPUT);”.
- Develop the code inside the void loop() command. Internally, in the bracket that it uses, the instructions that the Arduino will execute continuously must be established.
- Turn on the LED with the “digitalWrite” command. Being this command, the one in charge of sending the digital signal to the pin indicated at the beginning of the process. In such case, to turn on the pin, HIGH is indicated and therefore, the pertinent code to use is “digitalWrite(LED,HIGH)”. Also, delay command is used to be able to delay the time until the execution of the next instruction.
- Turn off the LED with a low signal LOW. Now, to get the LED off, you’ll have to give it a LOW signal via the digitalWrite command. In such a case, it is necessary make use of “digitalWrite(LED, LOW)” and the delay command must also be used.
Get to know the best Arduino Kits to work with RGB LED lights
Fortunately, when working with Arduinoamateurs and professionals have different solutions at hand that They facilitate the construction of their projects. With this, we refer to the arduino kits that are available in the market and provide different elements for increase the functionality of the various existing plate models.
So, with the aim that you can have much more simplicity when working with RGB LED lights in conjunction with Arduino, here we show you some of the best kits that you can buy for that:
Keyestudio KS-177 Colorduino Arduino LED Cube Kit 4 x 4 x 4 RGB
Is about a kit designed by the famous brand Keyestudio which has a price of around 60 euros. Basically, in it you can get an RGB LED with an ATMega328P chipset which has 2.54 connectors and operates under an I2C interface. Added to this, it includes a microcontroller, an acrylic frame, a set of LED framesa set of fixings and a UARTFT232 module.
Apart from that, also contains a 10-pin header, a 1 meter USB cable, a soldering guide and a general instruction manual. Among other details, it should be noted that its operating temperature is in a range between between -40 °C to 85 °C. In addition to this, the transmission voltage is between 7 and 12Vit is a kit that requires soldering and its specific model is the KS-177.
Keystudio SuperKit KS0078
It rates as one of the best kits out there for the hobbyist. Arduino. Since, by default, includes a total of 32 projects They range from the simplest to the most complex and have detailed tutorials. In addition to this, it is characterized by provide large-capacity functional modules (such as: RFID, humidity and temperature module). In addition to that, this kit offers one RGB LED, 5 red LEDs, 5 blue LEDs and 5 yellow LEDs, as well as an 8x8x1 LED matrix.
It also contains 4 large button switches, an active and a passive buzzer, more than 15 resistors of different types, an IR remote control,, an IR infrared receiver, a stepper motor, various modules (stepper driver, joystick, relay, etc.). Even, It has a PIR motion sensoran HC-SR04 ultrasound sensor, a gas sensor, a DHT11 temperature and humidity sensor, an LM35 temperature sensor and a soil moisture sensor.
Elego Robot Linking
This has been considered as one of the most relevant starter kits of all, in view of the different types of projects that facilitates. Taking into account that it allows working with RGB LED lights, since it contains these elements and, in addition, provides 25 LED units of different colors (white, red, green, yellow and blue). Among other details, offers an Arduino Uno R3 boardan extension board containing breadboard and LCD1602 display without backlight.
Among other elements, this kit that has an approximate cost of 30 eurosalso contains a USB cable, 65 jumper cables, a power adapter, a gyroscopea 4-pin DuPont line (female to female), an ultrasonic sensor HC-SR04an ultrasonic sensor holder, a thermistor, a single path relay module, a potentiometer, a remote control, among others.
Smraza Arduino Kit
Has two Arduino boards (UNO and Mega)which is why it is distinguished as an Arduino kit capable of building different projects based on Arduino, regardless of their level of…
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