Using the Grove Beginner Kit for Arduino with CodeCraft to make an LED flash. Includes how-to “blocky-program” the code using CodeCraft.

An LED is a Light Emitting Diode. It glows when turned on. The D4 pin on the microprocessor is connected to the LED. This lesson turns D4 repeatdly on and off making the LED flash.
The D in D4 means its a digital pin so it can either be on or off, like a switch. It outputs to the LED so is a Digital Output.

Hardware connection

For these lessons, the Components are already connected through the board. That is, for this lesson, LED module is already connected to D4 on the microprocessor.

Code Analysis

Setup

D4 is automatically set to output as it’s used with the LED.
No coding needed.

Loop

• Set D4 to Hi and so turn the LED on
• Delay for 1000ms (1 second)
• Set D4 to Lo and so turn the LED off
• Delay for 1000ms

Loop means that this part gets continuously repeated.

Go to the next lesson to see how to download the program to the board. Then come back and try the following:

LED Brightness Adjustment:**

On the Grove LED module, there is a variable resistor that can be adjusted using a screw driver. Twist it to make the LED light up brighter!