pulse width modulation podcasts

Eurorack e la magia della PWM

Rumore Bianco - Sintetizzatori modulari e ricette sonore

Play Episode Listen Later Aug 17, 2023 16:05

Eurorack e la Magia della PWMBenvenuti a un nuovo emozionante episodio del nostro podcast dedicato al mondo affascinante dei sintetizzatori modulari. Oggi ci immergeremo nel meraviglioso universo dell'Eurorack e scopriremo un elemento fondamentale della sintesi sonora: la Pulse Width Modulation, meglio conosciuta come PWM o modulazione di larghezza di impulso. Eurorack - Nel primo segmento, ci addentreremo nel mondo dell'Eurorack, un formato di sintetizzatori modulari che ha catturato l'immaginazione di musicisti, produttori e sperimentatori sonori di tutto il mondo. Esploreremo brevemente la storia dell'Eurorack, le sue radici e il motivo per cui è diventato così popolare. Discuteremo anche le ragioni dietro la flessibilità e la creatività offerte da questo formato unico. Pulse Width Modulation (PWM) - Nel secondo segmento, per la rubrica Tecnicamente, entreremo nei dettagli della Pulse Width Modulation, una tecnica di sintesi che consente di modulare la larghezza dell'impulso di un'onda quadra. Spiegheremo come funziona la PWM, le sue applicazioni pratiche nella creazione di timbri complessi e affascinanti. Atmospherica - Nella terza parte dell'episodio, vi parlo di Atmospherica, un progetto legato all'”Ascolto” come percorso e viaggio interiore. Il progetto è nato da un'idea di Francesca Pavese aka IDRA e da Giacomo Vanelli.Seguiteli su Instragram ai seguenti indirizzi:@__IDRA__@Giacomovanelli@atmospherica.atmospherica Grazie per aver preso parte a questo viaggio all'interno del mondo dei sintetizzatori modulari,. Ci vediamo giovedì prossimo! Seguimi su @daniel__mana e ricordati di iscriverti al podcast!

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Episode 95 – Gary Smith on the Need for PWM Training

ASA Podcast

Play Episode Listen Later May 12, 2021 28:48

Episode 95 – Gary Smith on the Need for PWM TrainingKeeping up with automotive technology requires ongoing training. That’s particularly true when it comes to learning more about Pulse Width Modulation (PWM). Gary Smith of DiagNation knows that better than most, but these days it’s as much about radio frequencies as it is basic electricity. The type of things we need to know about range from basic electrical components and circuits to how transistors affect current flow and signal generation in order to properly interpret waveforms. Gary talks about developing new types of test equipment to measure radio frequency signals, which offers the potential for faster and less-invasive test procedures. It’s not just about what we’re learning, but how we’re learning it! If you want a look ahead to where we’re going with automotive control systems, this podcast is for you!Among the many topics discussed, you’ll hear about:· Part of the gap between training and understanding comes down to the basics.· Understanding the physical mechanism and the electrical behavior behind it is more important than ever before.· Knowing how Pulse Width Modulation in its base form works allows one to expand their diagnostic capabilities between different models and manufacturers.· How to work the basics into advanced training to enhance your understanding of what the test equipment is telling you.· How modulation works and is used in modern automotive applications.· Why understanding signal processing allows you to improve your diagnostic skills to answer over 90% of all diagnostic questions you encounter.· The role of Pulse Width Modulation in ADAS control systems.· Why you’ll never outgrow the knowledge of basic signal processing.· How much of this training applies to the new challenges technicians will face as the vehicle fleet moves towards electrification.

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Episode 1.4 - Pulse Width Modulation

Geek Author

Play Episode Listen Later Feb 9, 2019 6:51

In this episode, we show how a binary signal can be used to give the appearance of an analog output. We then use this understanding to show how to dim an LED on the Arduino open source platform.

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Fade an LED with Arduino

Learn Programming and Electronics with Arduino

Play Episode Listen Later Mar 13, 2017 20:30

Let’s expand the repertoire of output that we can use by looking at the function analogWrite(). I experienced much confusion with analogWrite(), because I suspected that it had to do with the analog pins on the Arduino. The function, however, has nothing to do with the analog pins. There are 5 pins on most Arduino boards marked with ‘PWM’ next to the pin number (on some boards it is an “~” symbol) – these pins can be invoked to rapidly change the power being applied at the pin – this is a technique called pulse width modulation (PWM). If you like this tutorial, click here to check out FREE Video Arduino course – thousands of people have really enjoyed it. You Will Need LED – any color is fine 220 Ohm Resistor Alligator Clip Glacial ice cubes Step-by-Step Instructions Take the short leg of the LED and insert it in the GND pin. Take either leg of the resistor and place it in pin 9. Connect the long leg of the LED with the other leg of the resistor using an alligator clip Plug the Arduino into your computer with the USB cable Open up the Arduino IDE Open the sketch for this section. Click the Verify button (top left). The button will turn orange and then blue once finished. Click the Upload button. The button will turn orange and then blue when finished. Watch in mesmerizing amazement as the LED fades in and out. Arduino Fade an LED BoardThis image built with Fritzing. Discuss the Sketch Below is the sketch in its entirety from the Arduino IDE: /* Fade This example shows how to fade an LED on pin 9 using the analogWrite() function. This example code is in the public domain. */ int led = 9; // the pin that the LED is attached to int brightness = 0; // how bright the LED is int fadeAmount = 5; // how many points to fade the LED by // the setup routine runs once when you press reset: void setup() { // declare pin 9 to be an output: pinMode(led, OUTPUT); } // the loop routine runs over and over again forever: void loop() { // set the brightness of pin 9: analogWrite(led, brightness); // change the brightness for next time through the loop: brightness = brightness + fadeAmount; // reverse the direction of the fading at the ends of the fade: if (brightness == 0 || brightness == 255) { fadeAmount = -fadeAmount ; } // wait for 30 milliseconds to see the dimming effect delay(30); } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 /* Fade This example shows how to fade an LED on pin 9 using the analogWrite() function. This example code is in the public domain. */ int led = 9; // the pin that the LED is attached to int brightness = 0; // how bright the LED is int fadeAmount = 5; // how many points to fade the LED by // the setup routine runs once when you press reset: void setup() { // declare pin 9 to be an output: pinMode(led, OUTPUT); } // the loop routine runs over and over again forever: void loop() { // set the brightness of pin 9: analogWrite(led, brightness); // change the brightness for next time through the loop: brightness = brightness + fadeAmount; // reverse the direction of the fading at the ends of the fade: if (brightness == 0 || brightness == 255) { fadeAmount = -fadeAmount ; } // wait for 30 milliseconds to see the dimming effect delay(30); } The sketch starts with the usual multiline comment describing the program and how to set up the circuit. The first block of code we encounter is the declaration and initialization of three integer variables. The variable names and comments are both descriptive and helpful – remember this when naming and commenting your own code – useful comments are a pillar of success! int led = 9; // the pin that the LED is attached to int brightness = 0; // how bright the LED is int fadeAmount = 5; // how many points to fade the LED by 1 2 3 4 5 int led = 9; // the pin that the LED is attached to int brightness = 0; // how bright the LED is int fadeAmount = 5; // how many points to fade the LED by The brightness variable will store the value of the current brightness of the LED. fadeAmount is the rate at which the LED will fade and brighten. And of course, as the comments explain, led is simply the pin number where we have attached the LED (through a 220-ohm resistor). Now that we have declared and initialized our variables, we move on to setting up the board with the setup() function… void setup() { // declare pin 9 to be an output: pinMode(led, OUTPUT); } 1 2 3 4 5 6 7 void setup() { // declare pin 9 to be an output: pinMode(led, OUTPUT); } The only thing we do here is set the mode of pin 9 as an OUTPUT using the pinMode() function. Recall that pinMode() takes two arguments – the pin number and the mode. In this case, we assign the pin number using the variable led, which we previously initialized as the number 9. By now you know that setup() only runs once – the code inside the setup() curly bracket will only be executed a single time by the Arduino. Where the real action happens is in loop(). The first function we encounter in the loop() is analogWrite(). This function invokes the Pulse Width Modulation capabilities of the Arduino board. Pulse Width Modulation basically adjusts the power output at the pin. So you can have a lot of power or a little power applied at the pin, it’s your call, just tell the analogWrite() function which pin to modulate and how much power you want to be applied. The scale is from 0 to 255 with zero being the lowest power setting and 255 being the highest. For a discussion of what is actually happening with pulse width modulation check out the further reading section. As alluded to above, analogWrite() takes two arguments… analogWrite(pin, value); 1 analogWrite(pin, value); You can utilize analogWrite() with pins 3, 5, 6, 9, 10 and 11 – recall there is a “PWM” or “~” next to the pin number on the board. In this sketch we use the arguments: analogWrite(led, brightness); 1 analogWrite(led, brightness); The first thing we do in the loop is write a value to pin 9 (recall that led holds the number 9) where we have our LED attached (through a resistor) – and we set the value to 0 (zero is what our brightness variable initially holds). This will keep our LED dark to start with. Key Points about the analogWrite function The next line of code we encounter is: brightness = brightness + fadeAmount; ( 0 ) = ( 0 ) + (5)

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