Status LED

Learn how to use Sparki's Status LED

SparkiDuino

Easy

Lessons You Should Know

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Sparki has a small red LED light that can be used to display simple information. You can turn it on and off using digitalWrite, or partially turn it on using analogWrite.

Using the Part

With the basic Sparki code in place, you can use the status LED using these commands. You can copy-paste them into the code:

digitalWrite(STATUS_LED, HIGH); // will turn the LED on
digitalWrite(STATUS_LED, LOW); // will turn the LED off

1 2	digitalWrite(STATUS_LED, HIGH); // will turn the LED on digitalWrite(STATUS_LED, LOW); // will turn the LED off

You can also use the analogWrite function to tun the LED partially on or off:

analogWrite(STATUS_LED, 0); // will turn the LED 0% on (off)
analogWrite(STATUS_LED, 123); // will turn the LED 50% on
analogWrite(STATUS_LED, 255); // will turn the LED 100% on

analogWrite(STATUS_LED, 0); // will turn the LED 0% on (off)

analogWrite(STATUS_LED, 123); // will turn the LED 50% on

analogWrite(STATUS_LED, 255); // will turn the LED 100% on

SparkiDuino already has code examples for you to use: File > Examples > Status_LED

/*******************************************
 Status LED test

 Sparki has a red status LED, next to the
 power on LED. This code first blinks it
 on then off, then fades it on then off.
********************************************/
#include <Sparki.h>  // include the sparki library

void setup()
{
}

void loop()
{
    digitalWrite(STATUS_LED, HIGH); // will turn the LED on
    delay(500); // wait 0.5 seconds
    digitalWrite(STATUS_LED, LOW); // will turn the LED off
    delay(500); // wait 0.5 seconds

    for(int i=0; i<255; i++) // pulse the LED on
    {
      analogWrite(STATUS_LED, i);
      delay(5);
    }

    for(int i=255; i>0; i--) // pulse the LED off
    {
      analogWrite(STATUS_LED, i); // will turn the LED 100% on
      delay(5);
    }
}

/*******************************************

Status LED test

Sparki has a red status LED, next to the

power on LED. This code first blinks it

on then off, then fades it on then off.

********************************************/

#include <Sparki.h> // include the sparki library

void setup()

{

}

void loop()

{

digitalWrite(STATUS_LED, HIGH); // will turn the LED on

delay(500); // wait 0.5 seconds

digitalWrite(STATUS_LED, LOW); // will turn the LED off

delay(500); // wait 0.5 seconds

for(int i=0; i<255; i++) // pulse the LED on

{

analogWrite(STATUS_LED, i);

delay(5);

}

for(int i=255; i>0; i--) // pulse the LED off

{

analogWrite(STATUS_LED, i); // will turn the LED 100% on

delay(5);

}