Skip to main content
Arduino

Questions tagged [pwm]

Ask Question

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 ~).

498 questions
Newest Active Bountied Unanswered
Filter by
Sorted by
Tagged with
0 votes
0 answers
41 views

I try to use three PWM pins on an Arduino Nano, each with 10kHz. I know that there are timer0, timer1 and timer3 but I wonder if I can combine them while ensuring all three PWM pins to be in sync and ...
Jana's user avatar
  • 1
2 votes
1 answer
219 views

Not sure if this belongs more in an electronics SE, but I'll give this a try. I'm trying to use an ESP32-C3 and an NPN transistor (2N5551) to PWM drive an LED (values below). I'm trying a simple fade, ...
Lorenzo's user avatar
  • 149
0 votes
1 answer
214 views

I'm using an STM32F407ZET6 with the Arduino core support in PlatformIO. CPU has an external 8MHz crystal running at 168MHz. I have a project where I'm already using UART1, I2C1, SPI2 and SDIO (1Hz ...
Joe's user avatar
  • 61
1 vote
1 answer
139 views

I am trying to start a camera firing at a fixed interval on a long servo pulse, stop it firing on the next long pulse, start it again on the next long pulse, etc. I use an interrupt to detect if the ...
Don's user avatar
  • 21
1 vote
1 answer
115 views

I'm using an Arduino Mega 2560 to control a DRV8871 motor driver connected to a DC brushed motor. The setup includes: Three buttons: UP, DOWN, and FAST One limit switch input, where the upper and ...
Luigi's user avatar
  • 181
1 vote
2 answers
100 views

I'm trying to get some C code that runs on a PIC18F, working on an Arduino '328P. It uses an 8-bit timer, PWM, and a LUT to generate sine waves. I hope to get it going using Timer2 on a Nano. The PIC ...
Jim Mack's user avatar
  • 269
1 vote
1 answer
160 views

I am using an ATTiny88 to drive a PWM device. First of all, digging through the literature, it's hard to tell what the differences between the ATTiny85 and ATTiny88 are, and the vast majority of ...
LesRhorer's user avatar
  • 113
-1 votes
2 answers
218 views

How do I create a second output with a different frequency? void setup() { const byte DRIVEa = 3; // Timer 2 "B" output: OC2B pinMode (DRIVEa, OUTPUT); // driver a. TCCR2A = _BV (...
ted thomas's user avatar
  • 1
0 votes
1 answer
47 views

I have a Nano producing a PWM output from one of its pins. This PWM signal cannot stop as it drives a filament for a VFD display(if it stops, nothing shows). However, I need to capture the pulses from ...
lemon's user avatar
  • 113
0 votes
2 answers
269 views

We can use the function analogWrite(int x) for digital pins which support PWM because any microcontroller has a built in PWM generator.For given x and for Arduino Uno which is the formula to calculate ...
Root Groves's user avatar
  • 101
1 vote
1 answer
68 views

I'm using a UNO to generate a 10 kHz PWM signal. I need finer duty cycle variation. The prescalers supported are 1, 8, 32, and 64. void setup() { pinMode(3,OUTPUT); TCCR2A = bit (WGM20) | bit (...
Pranav Pillai's user avatar
  • 31
-1 votes
2 answers
1k views

The op of pin 11 should be inverse of pin 3. I used digitalreadfast and digitalwritefast and used simple if else. But the delay is high as 10us. What should i do? I found this code in forum but its ...
Pranav Pillai's user avatar
  • 31
-1 votes
1 answer
175 views

I am trying to use an Adafruit PCA9685 servo driver module with an ELEGOO Mega 2560 board. I am supplying the servo driver board with 5 V and tested all the wires to make sure. I tested the servo ...
Blaze48gamer's user avatar
  • 1
-1 votes
1 answer
167 views

I need to output two PWM signals, one of 50% duty cycle, the other 25% duty cycle, from an Arduino. Feed both signals into the 2 channels of a PicoScope and measure: a) the time difference between the ...
Regan Corban's user avatar
  • 1
0 votes
1 answer
109 views

I'm trying to generate a PWM signal from TCC1. I have a personnal board built with SAMD21E18A. I want to use pin 27 PA30, in my variant.cpp I have this line: { PORTA, 30, PIO_PWM, PIN_ATTR_DIGITAL|...
simon's user avatar
  • 133
2 votes
1 answer
854 views

I am new to Arduino and microcontrollers, I want to make a tone with my D1 mini and a LSM-50F speaker. But I don't get any output. Any idea what I am doing wrong? Tested it with two D1 mini boards. ...
Louis Eiden's user avatar
  • 23
0 votes
1 answer
122 views

I have a camera lens which I want to control by arduino (like this https://vi.aliexpress.com/item/1005004141070063.html) I have an info about wires description but I can't understand what focus A+, A-,...
Robotex's user avatar
  • 103
1 vote
2 answers
751 views

I need to drive a LED strip via MOSFET module. The module needs a high resolution PWM for very dim conditions. How can I set my pin to a 16 bit PWM resolution on an Arduino Nano Every?
awado's user avatar
  • 113
1 vote
0 answers
193 views

I have set up a very simple test program to blink an builtin LED using PWM. Following the mbed example and setting the period to 4 seconds (0.25 Hz) and duty cycle to 0.5, the expected behaviour is ...
Ivan Novikov's user avatar
  • 129
3 votes
1 answer
520 views

I'm trying to plot the value of the pwm that increases (every 2 sec) then decreases to compare it to the value of an encoder. I was expecting a continued value (like a step ) during 2 seconds but ...
Lavender Juliette's user avatar
  • 31
1 vote
1 answer
362 views

So PWM goes from 0 to 5V. How could I do -2.5 - 2.5V? Basically I am asking how to add offset to PWM signal. Should I use operational amplifier? How would I use it? I never had to deal with them, but ...
Name's user avatar
  • 135
4 votes
1 answer
2k views

I have the following circuit: (The Arduino is powered via the USB) The problem is that I the reading from the fan's tachometer signal are incorrect, I tried to add the two resistors as voltage ...
Takata's user avatar
  • 89
1 vote
1 answer
247 views

I want to give different PWM (D11) signals based on how much voltage is input (A7). How can I change PWM for different analog values? #include <LiquidCrystal.h> #include <ezButton.h&...
hfsrg's user avatar
  • 39
2 votes
1 answer
89 views

I've built the attached circuit with the following changes: I used Arduino Nano. I used 10K pot. 12V is connected to VIN pin (instead of RAW). The Arduino was connected to the PC by USB for the use ...
Takata's user avatar
  • 89
1 vote
1 answer
683 views

#include <PWM.h> int led = 9; void setup() { InitTimersSafe(); Serial.begin(115200); Serial.println(); variable_freq(); pinMode(A0,INPUT); } void variable_freq() { while(true) { ...
curious_direwolf's user avatar
  • 11
-1 votes
1 answer
391 views

I have to use PWM to control some lights. I do this successfully with: analogWrite(11, 127); for a 50% PWM pulse on pin 11. Now, i also have to have tone() support on my code. When I do: tone(10, ...
user1584421's user avatar
  • 1,435
-1 votes
1 answer
3k views

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 ...
appliedSciences's user avatar
  • 3
-1 votes
2 answers
110 views

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); } // ...
datta sahu's user avatar
  • 1
0 votes
0 answers
750 views

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 ...
PMF's user avatar
  • 1,306
-1 votes
2 answers
239 views

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 ?
Teddol's user avatar
  • 85
1 vote
2 answers
271 views

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 ...
BruceWawe's user avatar
  • 65
-1 votes
1 answer
797 views

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 ...
BlueStarXD's user avatar
  • 3
0 votes
1 answer
215 views

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: #...
S Andrew's user avatar
  • 183
1 vote
2 answers
4k views

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 ...
wroex24's user avatar
  • 13
0 votes
1 answer
350 views

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. ...
user1584421's user avatar
  • 1,435
-1 votes
1 answer
633 views

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 ...
ErnestW's user avatar
  • 109
0 votes
1 answer
2k views

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 ...
Robb Godshaw's user avatar
  • 86
0 votes
1 answer
4k views

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 ...
Stefan's user avatar
  • 103
-1 votes
2 answers
3k views

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 ...
user1584421's user avatar
  • 1,435
1 vote
0 answers
61 views

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 ...
huhu roro's user avatar
  • 11
-2 votes
1 answer
1k views

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 ...
Naveen Gupta's user avatar
  • 1
2 votes
0 answers
143 views

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 ...
J Collins's user avatar
  • 295
0 votes
2 answers
4k views

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 ...
Harry's user avatar
  • 11
1 vote
1 answer
254 views

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 ...
Grégoire Lefebvre's user avatar
  • 11
1 vote
1 answer
244 views

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 ...
Kathberny's user avatar
  • 11
2 votes
1 answer
310 views

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/...
Mr.Spriggs's user avatar
  • 21
2 votes
1 answer
2k views

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 ...
CoderBittu's user avatar
  • 21
2 votes
2 answers
697 views

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. ...
AhmedH2O's user avatar
  • 123
1 vote
0 answers
35 views

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....
Xaidi's user avatar
  • 51
0 votes
1 answer
504 views

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 ...
Bram's user avatar
  • 219

1
2 3 4 5
…
10