Questions tagged [pwm]
PWM is a form of signal modulation that allows digital output to approximate an analog signal. Use this for questions about using the PWM pins (marked with ~).
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Controlling a servo without the servo library
I am trying to control a servo without the "Servo.h" library.I am sending using analogWrite() some values to the servo.I know the servo takes input a continuous time signal however I dont ...
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why the p-mos is acting as a constant switch when the source is connect to any port in the circuit iam not able find the solution ?i
if my circuit has mistake please refer me the proper image.
#define pwm 6
void setup() {
// initialize serial communication at 9600 bits per second:
pinMode(6,OUTPUT);
Serial.begin(9600);
}
// ...
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I am trying to convert 40V DC to 24V DC using Arduino, is it possible to convert?
#define pwm 6
void setup() {
// initialize serial communication at 9600 bits per second:
pinMode(6, OUTPUT);
Serial.begin(9600);
}
// the loop routine runs over and over again forever:
void ...
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Arduino Due timer based PWM pattern signal
Here's the PWM pattern I want to generate (I've drawn only 1 period's waveforms, this pattern repeats each cycle i.e this figure is between 0 and T (T = time period))
I have been able to generate the ...
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ESP32 PWM with extended resolution doesn't work as expected
I have attached an RGB-LED to three output lines of the ESP32 and I'm trying to fade all colors independently. Since it didn't work with my code, I went back to the basic ESP32 ledcWrite_RGB sample ...
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Arduino 75kHz output frequency setup
i don't know how to manipulate arduino uno or mega registers and timers to be close to 75kHz output frequency. Could you help please ?
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PWM with a TRANSISTOR on flexible LED filament
I would like to create a custom lighting, with PWM capability, powered from battery. I would like to use flexible led filaments, and since those consumes more than 40mA, I can't use them directly on a ...
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What should happen when sending analogWrite signal to a non-PWM pin?
I'm a very new to Arduino and any electrical engineering, I'm learning through some Youtube tutorials.
Based on my understanding though, sending analog signals to a non-PWM pin would just check for a ...
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How to control PWM and digital pins at the same time over ethernet in arduino
I am using Controllino Maxi. It has an Arduino Uno inside it. I am trying to control the PWM pin D0 and digital pin R0 via python code. Below is the code I have upload on arduino:
Arduino Code:
#...
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Changing Frequency of PWM Pin on Arduino Uno
I am trying to change the frequency of the PWM output from an Arduino Uno R3 (Been using Pin 9) to 200 Hz with a duty cycle of 20%. This is for an ESC that is connected to a 12V motor, and I know the ...
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Creating an AC pulse with arduino and perhaps components
I want to create an AC PWM pulse with arduino. The microcontoller, will be also responsible for specifying the frequency (which will be around 500 Hz).
External electronic components can also be used. ...
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How to correctly set PWM to control servo angle in AVR?
I've stumbled upon timer configuration to handle my sg-90 servo and my Arduino UNO.
What I did:
Set the prescaler to 64 and mode to fast PWM of 16-bit timer.
The frequency is 50hz so the ICR1 is set ...
- 109
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Dynamic Phase Shift using Arduino Due TC?
Looking to add dynamic phase shifting to this h-bridge code. I essentially have two working complimentary pairs of signals running @ 100kHz with a 49% duty cycle. Here's what I have now.
I want to be ...
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Teensy 4.1 / 4.0 When to use FlexPWM vs QuadTimer pins to strobe LEDs
I want to strobe 3 LEDs (at independent frequencies and duty cycles) via mosfets with a duty cycle of 0.05%-1% at a frequency range of 24-100 hz. I would like to hold 1% or better accuracy for both ...
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PWM on Wemos D1 Mini (esp8266 chip) does not work
I am working on a hobby project: creating an rc-(radio controlled)-toy car.
I'm working with a Wemos D1 Mini (esp8266) microcontroller, L298N H-bridge (for controlling the motor) and I'm using the ...
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Perform Volume Control on arduino speaker
I am following this guide to produce tones with the arduino:
https://www.arduino.cc/en/Tutorial/BuiltInExamples/toneMelody
This uses the tone() builtin function. The connections is that one pin of the ...
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Audio range with custom waveshape
I am planning to use several Arduino to produce audio range analog signals. I need to use custom waveshapes generated on the fly. As far as I understand, there are two paths:
Aquiring a DAC, but can ...
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Using IN1/ IN2 pins for PWM instead of ENA in L298N
So basically i tried providing PWM directly to the IN1/IN2 Of L298n motor driver instead of using ENA pin i got more or less the same result
Im using ESP32 with 30000Hz freq for my PWM
My question is ...
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On initialising PWM with registers on my Due, why does unrelated duty cycle input influence my output?
I am finding that setting duty cycle on PWM channels 4 or 5 has an influence on whether channel 6 generates output. The following is a design of experiments view of my tests and results, where the ...
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Trouble understanding min and max parameters for the Servo motor
This picture is from arduino.cc . Could someone please help me understand these parameters min and max? I was using TinkerCad taking input for the angle using a potentiometer (having mapped correctly ...
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PWM and attachInterrupts issues
I'm trying to control the speed of a DC current motor with PWM.
I use an arduino UNO to send PWM signal to a mosfet Velleman vma411 to change the average tension of a my motor which is wired to ...
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Breathing LEDs on single PWM pin?
I'm doing a project which is essentially a lighted cube, that communicates status through different colors, where I get this ides [it][1] (having code). So when the light goes below a certain level it ...
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Atmega2560 PWM on PH4
I am trying to convert the following code to output to pin 7 (PH4, OC4B) on an Arduino Mega. The code outputs to pin 6. This code is from a GitHub for the GRBL on the Mega "https://github.com/...
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How does Arduino Servo.h library manage to output PWM when a Servo motor is connected to a non-PWM pin? [duplicate]
While learning more about Servos, the main thing i have learned is that, Servos (SG90) need PWM signal with the frequency of 50Hz. And the duty cycle of the frequency is used to rotate the angle of ...
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2
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199
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Arduino fade in/out 5 leds circuit acting wierd
I have a simple arduino project with 5 leds, the project should start with led 1 fade through 50 millisec to reach full brightness, then led 2 and so on until led 5 then turn them all off and loop.
...
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i have problem in generating pwm in steps
Given below is my loop and it counts 1 to 250 using the push button i just added this part as this one is the main part. I want to make it in steps like one press (push button) SETS IT TO 10 OR 20 ETC....
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Driving higher loads with PWM
My Arduino Pro Micro can source 500mA from 3.3V VCC, when it is USB powered.
The chip itself, is rated for 200mA, though, and its output pins for 20mA recommended, 40mA max.
I am looking to have 3 PWM ...
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Arduino, generating smaller frequency than 31Hz
I'm controlling a car instrument panel with Arduino using the tone() function, however with Arduino Uno's minimum 31Hz frequency I can only set the speedometer at ~12mph or more. I'd like to be able ...
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First I2C project - Unable to get any servo movement with PCA9685
I'm working on a project where I need to run multiple servos. For now though, I'm trying to get a single MG90S servo running with a PCA9685 servo driver but I'm unable to get any movement from the ...
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Variable frequency PWM, without changing timers
I need variable frequency output - 0-5000Hz with some duty cycle. I do not want to change timers, because I am using delays, serial and CAN, so I do not want them to be affected by changed timers. I ...
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Seeeduino XIAO write and read PWM duration (period) using timers
I am trying to communicate between two Seeeduino XIAO (chip: ATSAMD21G18A-MU) by way of TCC capture using register timers.
Square wave pulse duration varies from 200ns to 4us.
I found these two code ...
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Is a PWM phase duration set with OCR1A a reliable way to communicate values to other Arduinos?
I am working on communicating 4 switch states across multiple Arduinos using only one pin. It must be as fast as conceivably possible.
Currently I have a master Arduino reading all 4 switches (...
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Control output of XL6009 Boost converter with Arduino
I wonder if someone could help me with figuring out how to control XL6009 Boost converter via Arduino. I have this popular board, and it has potentiometer to adjust the output voltage. However, I want ...
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MC33926 Brushed Motor Driver (Shield/Carrier)
How can I use a MC33926 Motor Driver like it is offered for Arduino to drive forwards, backwards with a PWM and a direction control.
The problem is that the MC33926 has Inputs IN1 and IN2 and not PWM ...
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How do you get 2 PWM pins to inversely bitbang at 25 KHz on a Nano?
I need 2 PWM pins to oscillate at 25 KHz but they need to oscillate inverse to each other. When one is high, the other must be low and vise-versa.
I want to do this with a Nano.
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L298N motor controller board EN pins
For this device are the enable pins meant to be connected to PWM pins?
If so then how am I able to use this device with an arduino uno?
The uno does not have any pwm pins right?
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Writing multiple inputs to serial port using a while loop
I am trying to get the serial monitor to prompt me to input two settings - the PWM level and the Resonance level. I am being prompted to input the PWM level, but before I can input the Resonance level ...
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How to correctly measure the duty from an interrupt that is used for counting
Trying to get the duty cycle % from an input (pin27) on my ESP32 that is currently used for analog input to read out the voltage provided by a GM driver.
Anybody has an idea on how could I achieve ...
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DC Motor Acceleration with PWM
I'm not sure why this has been so difficult for me, but I'm trying to control the acceleration of a 10v DC motor with an Arduino UNO and an L298n H-Bridge. Using a 12v regulated power supply to power ...
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Can’t set duty cycle to 0% with custom PWM
I'm trying to control a heating element with PWM with an Arduino Nano, but the problem is even if I set the duty cycle to 0 it gives a tiny spike.
I want to generate a square wave of 1Hz and that's ...
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Fader OOP Problem
This code works and it can fade three LEDs without any problem, obviously you can even add more of them : )
// Pins Definition
const int button1 = 13;
const int button2 = 12;
const int button3 = 11;
...
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How can I read the Timer direction in phase correct PWM?
I have had to use Timer0 with phase correct PWM and a prescaler of 1. This results in a 32khz PWM frequency and obviously impacts millis, delay and micros. (Timer1 and Timer 2 are also in use so ...
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Arduino on/off PWM
When I turn on DC motor with a button I get a a fixed PWM value that goes into a loop till button state changes.
What should I change that I could change X value with potentiometer in a loop?
int X = ...
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Using 4x1 MUX to control a servo
I was supposed to first create a 4x1 MUX using AND and NOT gates. The 4 input data lines (io,i1,i2,i3) were 4 PWM pins from the arduino (3,5,6,9), with analogWrite() values as 100,150,200,250 ...
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Driving a servo with an ATTiny13A
So, I managed to fry my cheap servo/ESC (electronic speed controller) and decided to make my own using an ATTiny13A on some perfboard. But, I have run into some issues getting the servo to respond. I'...
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Generating Externally Triggered Complimentary PWM with Arduino Due
I need a 2KHz complimentary PWM waves with adjustable duty and phase that is triggered by an external 4KHz source.
After reading the datasheet I think there might be 2 way to do this:
Use a TC unit ...
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Arduino simulator - generating sine wave from PWD (Oscilloscope read is rectangular)
trying to create this simple circuit where a rectangular voltage input is transferred to a sine wave output.
the process is quite simple, but I couldn't see the actual sine wave when connecting an ...
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How should I decide the cut-off frequency for my low-pass filter?
I'm trying to generate some basic thumping stereo sound using Arduino's PWM pins along with low-pass filters.
This is the frequency spectrum for the sound I want to play using Arduino UNO's PWM pins:
...
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348
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Fast PWM with Arduino, the inputs outputs don't work
Hello to the community!
I am using ATTINY85 and I am programming it through the AVRISP using an Arduino UNO.
This is the code I am using :
#include <avr/io.h>
#include <avr/interrupt.h>
...
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Using PWM pins on the UNO to generate Stereo Sound
I am trying to generate stereo sound using an Arduino UNO. Instead of using a separate DAC chip (as shown here), can I use the PWM pins on the UNO along with a low-pass filter?
Also, would I need any ...