This article demonstrates how to create two buttons for switching the LED light ON and OFF, with simple Arduino and C code. The 220-ohm resistor is there to prevent the bulb from burning out. This article is for beginners who are interested in the Internet of Things. The negative end of the LED bulb is attached to the ground pin on the Arduino board and the positive end is attached to a 220-ohm resistor, which is inserted in pin 10 on the Arduino board. The physical setup on the Arduino Uno board is very simple. This happens five times, making the LED bulb blink five times. In the next two lines, I’m telling the Arduino to restore pin 10 to zero volts, which is why “LOW” comes after the “10”, for one second, using the delay(1000) command. Inside the curly brackets, I’m telling the Arduino to supply pin 10 with 5 Volts, using the digitalWrite command, for one second, using the delay(1000) command. What this command is telling the Arduino to do is to execute the command in curly brackets that follow five times, since x starts from zero and goes up to four. To explain what this code is doing, I’ll begin with the “for” statement. With this knowledge in my arsenal, writing the code was a cinch:
After consulting a friend, though, I discovered that the “int” statement defines a certain variable or value that can be used in a sketch, and the “x++” simply means to increase the value of “x” by one. I didn’t understand what the “int” statement was doing, and what “x++” meant. However, the tutorial on “For” statements was a bit more confusing. I was able to make sense of the digitalWrite statement that was explained in the “Blink” tutorial on the Arduino website and could even light the LED bulb on my Arduino Uno with little trouble.
Therefore, I would not need to touch the loop statement for this specific assignment. The setup statement makes whatever command is in between the brackets happen once, while the loop statement makes it repeat continuously. Sounds simple enough, right? Well, we’ll see about that.įirst, I went ahead and read these links that were in the assignment: and to get a better idea of how I would go about making my LED bulb blink five times.Īs I did I learned the difference between the setup and the loop statements in my bare minimum sketch. please let me know if I can help with anything else. I know how to program the input and output ports and crystal osc. Then we need to plug in the LED to GND (GND is the reference point in an electrical circuit from which voltages are measured, and is a common return path for electric current) and the 13 input on the board. The assignment was to make an LED bulb blink five times, and then stop. HI, can you please help me to program PIC16F877A to light 3 leds one at a time the 4th push will put the 3 leds off using one button. First, we need to plug in the USB Cable to the board and then the computer. Today, I decided to tackle the second assignment of my new piece of technology: the Arduino Uno.
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