Push Button LED

In this lab is to use a push button to turn on and off an LED light bulb.

BeginnerFull instructions provided2,247

Things used in this project

Hardware components

Texas Instruments MSP-EXP432P401R SimpleLink MSP432 LaunchPad

Push Button

LED (generic)

Resistor 10k ohm

Resistor 330 ohm

Software apps and online services

Texas Instruments Energia

Story

What is a Push Button? A push button is a simple switch mechanism for controlling some aspect of a machine or process; in our case we will control an LED. Push buttons are typically made out of hard material such plastic or metal. The surface is usually shaped to accommodate the human finger or hand, so the electronic switch can be easily depressed or pushed. Also, most push button switches are also known as biased switches, which can also be considered a “momentary switch” where the user will push-for “on” or push-for “off” type.

Objective: The objective of this lab is to use a push button to turn on and off an LED light bulb. We will write a program so that the LED responds to inputs provided by the push button.

Materials:

· Launchpad MSP432

· Energia software

· Breadboard

· Jumper wires

· 10K resistor (Push Button)

· 330 ohm resistor (LED)

How to set up your circuit: Follow the diagram that has been laid out below

Untitled file

//Pushbutton switch demo: LED is connected to digital pin 8 and Pushbutton is connected to digital pin 12. 
//The LED glows when the button is pressed.
 
char inputButtonState;
 
void setup()   
{                
  pinMode(8, OUTPUT);        // Initialize Arduino Digital Pins 8 as output for connecting LED
  pinMode(12,INPUT);         // Initialize Arduino Digital Pins 12 as input for connecting Pushbutton
}
 
 
void loop()                     
{
  inputButtonState = digitalRead(12); //Read the Pushbutton state.
 
  if (inputButtonState == HIGH) 
  {     
    digitalWrite(8, HIGH);  //Switch on LED
  } 
  else 
  {
    digitalWrite(8, LOW);   //Switch off LED
  }
 
}