If the LED still does not illuminate when the test button is pressed, the PSU is possibly faulty. If the PSU LED does not illuminate, remove the PSU cables from the system board and test again.Ensure that the power cable is connected to the supply and press the test button to test the PSU. A test button and LED are on the side of the unit where the AC plug is located. All power supply units include a self-test ability in an isolation mode.Ensure that the main power cable and front panel cable are securely connected to the system board.Ensure that the electrical outlet is working by testing it with another device.Ensure that any power strips being used are plugged into an electrical outlet and are turned on.Bypass power strips, power extension cables, and other power protection devices to verify that the computer turns on properly.Reseat the power cable in the power connector on the back of the computer and the electrical outlet.The goal of this little LED Light Coding project was to introduce you to elementary principles of how hardware and software can be combined.The computer is either turned off or not receiving power. Then after 1 second it turns the same LED off by turning the volt to LOW. The loop basically takes in the LED, and then turns the volt to HIGH which turns it on. The digitalWrite is a function that takes in 2 parameters, LED_BUILTIN and HIGH || LOW. The code above basically turns the LED on for 1 second and then turns it off for one second. ![]() the loop function runs over and over again foreverĭigitalWrite(LED_BUILTIN, HIGH) // turn the LED onĭigitalWrite(LED_BUILTIN, LOW) // turn the LED off initialize digital pin LED_BUILTIN as an output. the setup function runs once when you press reset or power the board Code to make the LED flash on/off:Īfter the microcontroller board is plugged into the computer and the LED is on the board itself, we need to write some simple code to make the LED blink. 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. In this project, we are only going to make the LED blink.įirst, we need to plug in the USB Cable to the board and then the computer. In our project, we will use a USB cable to connect our microcontroller to our computer. The USB is used to connect your computer to devices such as digital cameras, printers, scanners, and external hard drives. You need a USB Cable to connect the Elegoo Uno R3 to your computer and turn it on. Simply plug in the USB Cable to turn the microcontroller on. This board has everything you need to support the microcontroller. The microcontroller that is included in the Elogoo Uno R3 has 14 digital input/output pins, 6 analog inputs, a USB connection, a power jack, and a reset button. They are compact integrated circuits designed to control operations. Microcontrollers are embedded inside devices to control the actions and features of a product. The Elogoo Uno R3 is a microcontroller board. Components You'll Need Elegoo Uno R3 Elegoo Uno R3 Each project in the box advances your skills in a simple, easy to follow way. ![]() The LED Light is the first project offered with their kit.Įlegoo Uno comes with many other projects and takes you through from beginner to advanced projects. The Elegoo Uno starter kit has all the hardware as well as instructions you need to make a simple LED Light. It's a simple project you can complete in a weekend that'll help you learn some basic aspects of hardware.īy the end of the project, you will code your own LED light, have the knowledge to manipulate the LED to on/off in intervals you choose, and learn basic principles of hardware. Coding an LED Light is introductory project that shows you how software and hardware interact with each other.
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