LED is the most popular among diodes
LEDs are electronic components that emit light when voltage is applied to their findings. So ,,normal” semiconductor diodes, LEDs also have electrical conductivity in one direction, i.e. from the anode to the cathode. The parameter which determines the color of illumination of the diode, the voltage at which the diode begins to conduct and voltage is typically higher than for diodes germanowych (usually in order. 0,3 V) or silicon (typically 0.7 V approx.). For example, a very brightly glowing blue led, it will be about. 3.3 V and red of 2.2 V. approx. the LEDs have a wide application in the interfaces of different devices, such as optical signaling misleading, for example, about the end of the battery charging or activation level of an audio signal. In addition, writing a program to the microcontroller and using the PWM driver, you can create interesting animation, which is displayed on the LEDs. Increasingly, LEDs can also be seen in the lampposts and street displays and toys. There are also LEDs that emit light invisible to the human eye, e.g., infrared LEDs, present in the majority of remotes to control consumer ELECTRONICS. Another practical use of LEDs is the optical isolation high-voltage circuits from low voltage circuits by means of optocouplers, in which the indicator works with the optical sensor.
LEDs RGB rich color palette in the electronic version!
With the help of LEDs of the RGB type, you can create light with almost any color visible to the human eye, using a combination of luminescence intensity of red, green and blue emitted by the led is RGB. For example, wanting to receive the light color is pure blue, you need to install activate the blue LEDs at the maximum value, and the indicator red and green to control the least possible tension. To get white light all the LEDs that form the RGB diode must be connected so that all burned with the most intense light. Since the LEDs are located on the RGB diode is located very close to each other, the result visually is a combination of colors is not published. Control of RGB LEDs and their different colors of light, it is best to get for drivers with PWM, also available in our offer and are compatible with modules led flashlights Grove.
Glamorous LED matrix
The store Botland, there is a square matrix constructed from the LEDs in the 8x8 system, which can work with Arduino and other popular platforms, equipped microcontroller. Matrix LED-they have many uses - for example, ads lighting on the facades of the building. Control signal for the LED matrix can be brought to her in the order, sequential or parallel, that determines the order zaświecania and suppression of the individual diodes that form the matrix. Please note that when you connect a LED matrix printer for Arduino, connect the ground supply (GND) of the sensor to ground on the Arduino. Once connected, you can immediately start to upload the finished program to render the graphics LED ones, and also to create projects animation on the matrix LEDS.