Program a microcontroller to light up an led

Using only a few lines of code and a little wiring connection, one can easily turn on or turn off an LED. The shorter leg is the negative and the longer one is the positive. There are 3 available GND pins, but we will use the one beside digital pin The longer side will be connected to pin The Arduino will blink a few times. This indicates that it is now connected. A microcontroller is a piece of hardware that can control other hardware devices using software.

This means that if you connect a device to the Arduino, you can control that device by writing codes. In this article, we can turn on an LED by writing a simple computer program.

In the same manner, we can also turn the LED off. Make sure you have already installed the Arduino IDE in your computer. It simply a software where you can write and compile your Arduino codes. Installation is pretty straight-forward or you can follow the installation instructions from their site.

Each pin can be used both as a digital input or a digital output. As its name suggests, this 7-bit register is used to set the direction of data. In other words, it defines the nature of pin either as a digital input or a digital output. Note: RC4 and RC5 pins can be used only as digital input pins only.

This code blinks an LED with a delay of one second. This section describes a LED sequencer circuit designed using a pic microcontroller. The sequencer circuit generates a blinking pattern sequence with a specified pattern. As you can see in this circuit, it blinks alternate LEDs with a sequence of one, two and three respectively. In this section, we explain how to interface an LED with a pic microcontroller and programming using MikroC Pro for pic compiler. The circuit diagram and the simulation will be done in Proteus.

A resistor is used as a current limiting resistor. Because the maximum current a single pin can provide to LED is 5mA. To simulate the circuit as per our desired function i. The while loop will execute infinite times. This process is repeated until the program is aborted. This causes the blinking of the LED. The speed of the Blinking LED can be increased or decreased by varying the delay value.

These lines are not compiled with the program, instead, they are used to explain the operation of the programming statement. It is very cheaply and easily available in a variety of shape, color, and size. The LEDs are also used for design message display boards and traffic control signal lights etc.

The only way to know polarity is either to test it with a multimeter or by carefully observing inside the LED. There are two ways which we can interface LED to the Microcontroller But the connections and programming techniques will be different. And vice versa with the interface 1 connections. The circuit diagram is shown in below. An LED is connected to the pin-0 of port The value of this resistor is calculated using the following formula. Generally, microcontrollers output a maximum voltage of 5V.

Thus, the value of resistor calculated for this is Ohms. This resistor can be connected to either the cathode or the anode of the LED.

Here, for the first 7 seconds, the program will execute the LED Blink function i. Then the program jumps to binary representation of 1 byte data using 8 LEDs.

Here, for every milli seconds the value will increment by 1, and when it reaches to then the program will start from the beginning. No need complete of complete board.. You need only microcontroller with code burned into it,reset cirucit ,crystal,Leds.