PROGRAM

-
const byte OUTPUT_PIN = 3;  // Timer 2 "B" output: OC2B

const byte n = 65;  // for example, 8.89 kHz

void setup()
 {
  pinMode (OUTPUT_PIN, OUTPUT);

  TCCR2A = bit (WGM20) | bit (WGM21) | bit (COM2B1); // fast PWM, clear OC2A on compare
  TCCR2B = bit (WGM22) | bit (CS21);         // fast PWM, prescaler of 8
  OCR2A =  n;                                // from table 
  OCR2B = ((n + 1) / 2) - 1;                 // 50% duty cycle
  }  // end of setup

void loop() { }

This page can be quickly reached from the link: http://www.gammon.com.au/timers

PWM Phase shifting program
 

Creating a variable frequency PWM output on Arduino UNO:

Arduino PWM cheat sheet: 

 

https://i2.wp.com/lh5.ggpht.com/--iP5HriHo70/Tt9AaevwgCI/AAAAAAAADg8/POSmoR0T8_g/clip_image005_thumb%25255B4%25255D.jpg?resize=622%2C246clip_image002

Location: Canada

Comments

Post a Comment

Popular posts from this blog

ARDUINO WITH I2C LCD DISPLAY USING PCF8574A

-
Image
fig:1,  Proteus Simulation /*   This is an Example for the  LCD I2C  Library originally added 18 Apr 2017  by HARIKRISHNAN  library modified 12 Jul 2017  */ // include the library code: #include <Wire.h> #include <FaBoLCD_PCF8574.h> // initialize the library FaBoLCD_PCF8574 lcd(0x3f); void setup() {   // set up the LCD's number of columns and rows:   lcd.begin(16, 2);   // Print a message to the LCD.   lcd.print("hello, AM HARIKRISHNAN!"); } void loop() {   // set the cursor to column 0, line 1   // (note: line 1 is the second row, since counting begins with 0):   lcd.setCursor(0, 1);   // print the number of seconds since reset:   lcd.print(millis() / 1000); }                                                                                                            Harikrishnan K                                                                                                             ( BE, EEE )
Read more
-
1.       What is the volume of the cylindrical tank ? Statement I:  Diameter of the base is equal to the height of the tank. Statement II:  Height of the tank is 20 m. Statement III:  Area of the base is 320 sq. m. A) Only I and III. B) Only I C) Only III D) Any of the two E) None of these 2.       What is the selling price of the camera if no discount is offered ? Statement I:  Cost price of the camera is Rs.10,000. Statement II:  Profit earned was  20%. Statement III:  Had 20% discount been offered on selling price  the profit would have been Rs. 700. A) Only III B) Only II and III C) Only I and II D) All of these E) Any two of these 3.       How many students failed in class 6 ? Statement I:  400 students passed in class . Statement II:  Number of students failed in class 6 is 10% of those of failed in class 7? Statement III:  75% of the students who appeared in examination have passed either in class 8. A) Only II and III B) Only I and II C) Only II
Read more

SEND SMS USING ARDUINO AND GSM

-
Image
                                                                                                             fig1; proteus simulation               PROGRAM Send message when a button is pressed const int SENSORPIN = 2;  void SendMessage() {   Serial.print("AT+CMGF=1");   Serial.write(0x0D);   delay(2000);   Serial.print("AT+CMGS=");   Serial.write(0x22);   Serial.print("974668xxxx");   Serial.write(0x22);   Serial.write(0x0D);   delay(2000);   Serial.print(" POLLUTION DETECTED ");   Serial.write(0x1A);   delay(3000); } int  SENSORSTATE = 0; void setup() {   Serial.begin(9600);    // Setting the baud rate of Serial Monitor (Arduino)   delay(100); pinMode(SENSORSTATE, INPUT); } void loop() {   SENSORSTATE = digitalRead(SENSORPIN);   if (SENSORSTATE == HIGH) { while(digitalRead(SENSORPIN)== HIGH);          SendMessage(); } } PROGRAM Send message to two different NO, when a button is pressed
Read more