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Questions tagged [pwm]

PWM (Pulse-width modulation) is a technique for controlling power to electrical devices, made practical by modern electronic power switches.

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Arduino pulse train

I will give you a little introduction: I am working on a water fuel cell of Stanley Meyer. For those who don't know the water fuel cell you can see it here. For the water fuel cell one has to build a circuit. Here is the diagram: Right now I am…
Arturo Veras
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How to setup PWM output on an LPC11CXX series microcontroller without any timer resets

Background: I have this LPC11C24 microcontroller that I'm working on that uses a single 32 bit timer to read PWM input on one pin and control PWM outputs on 2 other pins. Being that input and output are on the same timer, I do not do any resets of…
LaneL
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How to create an Accurate Timer in Arduino Due

I'm trying to create some PWM waves using a TC timer in Arduino Due. My problem is that I cannot generate accurate frequencies using this kind of timers. Here's a simple code for what I'm trying to do : static void setupTimer(uint32_t…
M.Moncif
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Arduino Due PWM

I want to be able to use the Arduino Due PWM at higher resolution and frequency than what is available by default. I use IDE 1.6.8, that was the most recent a few weeks ago when I installed it (I think 1.6.9 may be on its way now). After searching…
Zorglub29
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RF motor/servo control

I have been wrecking my head over this the last weeks and cannot find useful information online on how I should do this. The Goal: Drive several servo/RC motors wireless from one pi to another pi. In essence, I want to build a RC remote control…
Misha
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uC/OS-III Systick & Peripheral timer0 for PWM interfere

I'm having trouble in getting a PWM signal for LEDs running smoothly on a NXP LPC1857 running uC/OS-III. Only when I disable the OS systick running at 1ms the flickering which regulary occurs stops. I have set up my timer with 4 match registers, one…
Futience
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MATLAB and Arudino, set registers (PWM)

I am using an Arduino MEGA with MATLAB for the first time to try and control a servo motor, the issue is that the default PWM frequency for the pin I am trying to use is at 976Hz, while I need it to be around 50Hz. I found code for changing the…
oblivioncth
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how to get trapezoidal pwm signal

I generate a PWM signal with a microcontroller Kinetis, I don't want to get really a digital signal what I'm trying to do is to convert this signal to a trapezoidal one where the T rise and T fall are longer. I've found that I have to set an RC…
Tova
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Multiple PWM Channels on PIC

I use the PIC16F88 for my project, with XC8 compiler. What I'm trying to achieve is to control 4 LEDs with 4 buttons, when you press a buttons it increases the duty cycle of the corresponding LED by 10%. When you press the button on RB0 it increases…
Quarky-Up
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Running wiringPi-python hardware PWM withoot root

I am attempting to run wiringpi to control the hardware PWM on GPIO 18 on the pi. If I use wiringPiSetupGpio() as below and I run as root everything works. Using wiringPiSetupSys() as documentation suggests does not work, even when ran as…
SpaceCase
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Controlling a servo-motor with PWM on MSP430

I am a beginner coder learning on the MSP430FR4133. I'm using a servo motor as part of my system, which is controlled by PWM. The motor rotates across 180°, with a 1ms pulse being far right and 2ms pulse being far left in a 20ms period.…
RDA
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Frequency issues in simulink interface with arduino

I'm trying to generate 6 PWM signals by comparing sine and triangular waves on simulink.In the scope I'm getting the frequency of PWM signals as 50 HZ. But when I deploy the model onto arduino, the frequency of the PWM signal is getting reduced to…
chandan m reddy
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How to implement Sine PWM using Tiva TM4C123G?

I am trying to implement the SPWM (Sine PWM) using the TM4C123G Microcontroller. I tried to do the same thing using another microcontroller, the STM32F100RB and it kinda worked. Here is the link for my repository in case someone want to take a…
Feliphe G. Galiza
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pwm generation using fpga

How to generate a PWM signal using an FPGA? Which is best method to generate a variable duty cycle? I tried to solve this problem by using the following code but two or three errors occurred. This is my code: library IEEE; use…
Snehal Baviskar
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Attribute error : RPi.GPIO.PWM has no attribute 'ChangeDutyCycle'

So i'm making a little robot using a raspberry pi B+ , everything is going fairly nicely, but I get this error message that I don't seem to be able to solve .. Attribute error : RPi.GPIO.PWM has no attribute 'ChangeDutyCycle' Here's two things you…
Dominus
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