In this lesson we show how you do have some ability to adjust the tone on the Active Buzzer to make a sound or alarm that is a little more interesting. If you want to make notes or play simple songs you should use the passive buzzer, but the active buzzer can be adjusted somewhat.

If you want to follow along at home, you can order the Arduino Kit we are using HERE.

The video above takes you through the hookup and the steps. Also, the code used in the example above is:

int buzzPin=8;
int dt1=1;
int dt2=2;
int j;
void setup() {
  // put your setup code here, to run once:
pinMode(buzzPin, OUTPUT);
}

void loop() {
for (j=1;j<=100;j=j+1){
  digitalWrite(buzzPin, HIGH);
  delay(dt1);
  digitalWrite(buzzPin, LOW);
  delay(dt1);
}
for (j=1; j<=100;j=j+1){
  digitalWrite(buzzPin, HIGH);
  delay(dt2);
  digitalWrite(buzzPin, LOW);
  delay(dt2);
}
}

int buzzPin=8;

int dt1=1;

int dt2=2;

int j;

void setup() {

// put your setup code here, to run once:

pinMode(buzzPin, OUTPUT);

}

void loop() {

for (j=1;j<=100;j=j+1){

digitalWrite(buzzPin, HIGH);

delay(dt1);

digitalWrite(buzzPin, LOW);

delay(dt1);

}

for (j=1; j<=100;j=j+1){

digitalWrite(buzzPin, HIGH);

delay(dt2);

digitalWrite(buzzPin, LOW);

delay(dt2);

}

Arduino, Tutorial

Arduino Tutorial 22: Understanding and Using Active Buzzers to Add Sound to Your Project

August 8, 2019 admin

In this lesson we show you how to add sound to your Arduino project using a buzzer, The Elegoo Super Starter kit contains two buzzers, an active buzzer and a passive buzzer. The active buzzer is the easiest to use, as you just need to apply 5 volts to it to get it to go off. In this lesson we show you how simple it is to use the active buzzer with Arduino. In future lessons we will show you how to use the passive buzzer.

The advantage of the active buzzer is that it is easier to use. Just apply 5 volts, and it goes off. The advantage of the passive buzzer is that it is cheaper, and allows you more control of the tone, or pitch of the sound produced. If you want to follow along at home, you can order the Arduino Kit we are using HERE.

Arduino, Success

Arduino Tutorial 21: Understanding and Mixing Primary Colors with an RGB LED

August 6, 2019 admin

In lesson 20 we showed you how to connect up an RGB LED, and how to program it to get the primary colors, based on input from the user. In this lesson we look at mixing colors and getting a wide array of colors from the LED by mixing the R, G, and B channels. As examples, we use RGB mixing to create Cyan, Magenta, and Yellow. These are just examples, and any of the in between colors can also be mixed.

If you want to follow along at home, you can order the Arduino Kit we are using HERE.

The video shows how to connect the circuit, and also takes you step by step through the code. If you need extra help, the code is included below.

int redPin=8;
int greenPin=9;
int bluePin=10;
String myColor;
String msg="What Colour Do You Want?";
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(redPin,OUTPUT);
pinMode(greenPin,OUTPUT);
pinMode(bluePin,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
Serial.println(msg);
while (Serial.available()==0){
  
}
myColor=Serial.readString();

if (myColor=="red"){
  digitalWrite(redPin,HIGH);
  digitalWrite(greenPin,LOW);
  digitalWrite(bluePin,LOW);
}
if (myColor=="green"){
  digitalWrite(redPin,LOW);
  digitalWrite(greenPin,HIGH);
  digitalWrite(bluePin,LOW);
}
if (myColor=="blue"){
  digitalWrite(redPin,LOW);
  digitalWrite(greenPin,LOW);
  digitalWrite(bluePin,HIGH);
}
if (myColor=="off"){
  digitalWrite(redPin,LOW);
  digitalWrite(greenPin,LOW);
  digitalWrite(bluePin,LOW);
}

if (myColor=="yellow"){
  analogWrite(redPin,255);
  analogWrite(greenPin,100);
  analogWrite(bluePin,0);
}
if (myColor=="cyan"){
  analogWrite(redPin,0);
  analogWrite(greenPin,255);
  analogWrite(bluePin,255);
}

if (myColor=="magenta"){
  analogWrite(redPin,255);
  analogWrite(greenPin,0);
  analogWrite(bluePin,100);
}

if (myColor=="aqua"){
  digitalWrite(redPin,LOW);
  analogWrite(greenPin,255);
  analogWrite(bluePin,80);
}
}

int redPin=8;

int greenPin=9;

int bluePin=10;

String myColor;

String msg="What Colour Do You Want?";

void setup() {

// put your setup code here, to run once:

Serial.begin(9600);

pinMode(redPin,OUTPUT);

pinMode(greenPin,OUTPUT);

pinMode(bluePin,OUTPUT);

}

void loop() {

// put your main code here, to run repeatedly:

Serial.println(msg);

while (Serial.available()==0){

}

myColor=Serial.readString();

if (myColor=="red"){

digitalWrite(redPin,HIGH);

digitalWrite(greenPin,LOW);

digitalWrite(bluePin,LOW);

}

if (myColor=="green"){

digitalWrite(redPin,LOW);

digitalWrite(greenPin,HIGH);

digitalWrite(bluePin,LOW);

}

if (myColor=="blue"){

digitalWrite(redPin,LOW);

digitalWrite(greenPin,LOW);

digitalWrite(bluePin,HIGH);

}

if (myColor=="off"){

digitalWrite(redPin,LOW);

digitalWrite(greenPin,LOW);

digitalWrite(bluePin,LOW);

}

if (myColor=="yellow"){

analogWrite(redPin,255);

analogWrite(greenPin,100);

analogWrite(bluePin,0);

}

if (myColor=="cyan"){

analogWrite(redPin,0);

analogWrite(greenPin,255);

analogWrite(bluePin,255);

}

if (myColor=="magenta"){

analogWrite(redPin,255);

analogWrite(greenPin,0);

analogWrite(bluePin,100);

}

if (myColor=="aqua"){

digitalWrite(redPin,LOW);

analogWrite(greenPin,255);

analogWrite(bluePin,80);

}

Arduino, Tutorial

Arduino Tutorial 20: Understanding RGB LED’s

August 1, 2019 admin

In this lesson you will learn how to work with RGB LED’s. RGB LED’s can be used to create not only the primary colors, but also all mixtures of the primary colors. This video shows you how to connect up a Common Cathode RGB LED. This project is a little more complex than the ones we have done in the past, so I include the code down below. While the code is here for your reference, you should not just copy and paste it. In order to really learn, you need to type it in for yourself, and then find and debug your mistakes. If you just copy and paste from me, you will never learn how to troubleshoot.

int redPin=8;
int greenPin=9;
int bluePin=10;
String myColor;
String msg="What Colour Do You Want?";
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(redPin,OUTPUT);
pinMode(greenPin,OUTPUT);
pinMode(bluePin,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
Serial.println(msg);
while (Serial.available()==0){
  
}
myColor=Serial.readString();

if (myColor=="red"){
  digitalWrite(redPin,HIGH);
  digitalWrite(greenPin,LOW);
  digitalWrite(bluePin,LOW);
}
if (myColor=="green"){
  digitalWrite(redPin,LOW);
  digitalWrite(greenPin,HIGH);
  digitalWrite(bluePin,LOW);
}
if (myColor=="blue"){
  digitalWrite(redPin,LOW);
  digitalWrite(greenPin,LOW);
  digitalWrite(bluePin,HIGH);
}
if (myColor=="off"){
  digitalWrite(redPin,LOW);
  digitalWrite(greenPin,LOW);
  digitalWrite(bluePin,LOW);
}

if (myColor=="aqua"){
  digitalWrite(redPin,LOW);
  analogWrite(greenPin,255);
  analogWrite(bluePin,80);
}
}

int redPin=8;

int greenPin=9;

int bluePin=10;

String myColor;

String msg="What Colour Do You Want?";

void setup() {

// put your setup code here, to run once:

Serial.begin(9600);

pinMode(redPin,OUTPUT);

pinMode(greenPin,OUTPUT);

pinMode(bluePin,OUTPUT);

}

void loop() {

// put your main code here, to run repeatedly:

Serial.println(msg);

while (Serial.available()==0){

}

myColor=Serial.readString();

if (myColor=="red"){

digitalWrite(redPin,HIGH);

digitalWrite(greenPin,LOW);

digitalWrite(bluePin,LOW);

}

if (myColor=="green"){

digitalWrite(redPin,LOW);

digitalWrite(greenPin,HIGH);

digitalWrite(bluePin,LOW);

}

if (myColor=="blue"){

digitalWrite(redPin,LOW);

digitalWrite(greenPin,LOW);

digitalWrite(bluePin,HIGH);

}

if (myColor=="off"){

digitalWrite(redPin,LOW);

digitalWrite(greenPin,LOW);

digitalWrite(bluePin,LOW);

}

if (myColor=="aqua"){

digitalWrite(redPin,LOW);

analogWrite(greenPin,255);

analogWrite(bluePin,80);

}

In these lessons, we are using the Elegoo Arduino kit, which you can purchase HERE.

Technology Tutorials

Monthly Archives: August 2019

Arduino Tutorial 23: Changing Tone of an Active Buzzer

Arduino Tutorial 22: Understanding and Using Active Buzzers to Add Sound to Your Project

Arduino Tutorial 21: Understanding and Mixing Primary Colors with an RGB LED

Arduino Tutorial 20: Understanding RGB LED’s

Making The World a Better Place One High Tech Project at a Time. Enjoy!