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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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How to blink two led simultaneously using Beaglebone black PWM pins in python

I am writing a program in python to blink two led simutaneously. For this I am using beaglebone black pwm pins. Earlier I wrote to blink 5 led's one by one which worked fine. Now I am trying to blink two led together, but that's not working. It is…
Archana Roy
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STM32F1 timer share for PWM and interrupt

i'm implementing a project using stm32f101cb microcontroller. I understand that this control have 3 timer in it. TIM2 and TIM4 had been set to encoder mode to capture 2 rotary encoder. I'm now left me the only timer TIM3, I would to ask is there…
chris chiang
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raspberry pi B+ hardware PWM

Raspberry pi B+ has four hardware PWM. How to use them in C/C++. The less complicated solution - the better. I found one working solution with WiringPi gpio mode 1 pwm gpio pwm-bal gpio pwmr 1024 gpio pwm 1 500 This solution works only for…
vlado
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Send shell command remotely via ssh in C++

I want to open a ssh session to my Raspberry Pi and run simple command echo 0=+10 > /dev/servoblaster at what time I want ( means not using system("ssh pi@192.168.1.5 echo 0=+10 > /dev/servoblaster") because it takes time to run ssh again). What is…
Nhan Ly
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Arduino Uno PWM - Strange Results

I've been experimenting with the PWM Waveform Generation Modes on the ATMega328P. I've been getting some strange results and I can't figure out if its a problem with how I'm writing the firmware or how I'm interpreting the datasheet. Here's the…
user3235556
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Pin States of Beaglebone Black on Power Up

I'm trying to use Beaglebone Black for driving a motor circuit. I have managed to enable and use PWM pins (P8_13 and P8_19 namely). But I have a problem. When I first power up the board, these pins become HIGH state so the motor starts running…
UnfoX
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PWM Audio with reading data from SD card

Currently I'm working on this Arduino/Nanode project where we want to play a collection of WAV-files stored on a SD-card, with PWM on clock OCR0. - I'm able to play the PWM perfectly, starting from the sketch from Michael Smith on the Arduino…
JeroenJanssen
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PI negative controller output to unsigned duty cycle

I am trying to implement a PI controller in C that outputs / controls a PWM's duty cycle on a microcontroller. The duty cycle that I can write to the certain PWM control register is limited to 10bit (values 0 - 1023 correspond to 0% - 100% duty…
Alles Klar
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How to control adressable RGB leds with raspberryPi in Java

I have a strip of WS2811 adressable RGB leds and I am trying to control them using my raspberry pi. I am programming in java. To access the GPIO I am using a java library called Pi4j (version 1.2; java 8). This version has built-in PWM control. My…
error13660
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How do I control PWM output on Arduino using TinyGo

I'm trying to turn a motor using An Arduino ATMega2560 with code written in Go. There's an example here that uses TinyGo v0.14.1: https://create.arduino.cc/projecthub/alankrantas/tinygo-on-arduino-uno-an-introduction-6130f6 The example in essence…
Mor Blau
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Enormous setup time for PWM on BeagleBone Green Wireless

Note: the only BeagleBone tag I could find was for the Black, this is a Green Wifi, but I have no reason to believe the Green and Black behave differently in this matter. Alternate tagging recommendations welcome. For an embedded application, I'm…
Steve Friedl
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MG 996R servo Raspberry Pi angle control

I am using an MG 996R servo connected to a Raspberry Pi and an external power supply. I am using this code: import RPi.GPIO as GPIO import time servoPIN = 17 GPIO.setmode(GPIO.BCM) GPIO.setup(servoPIN, GPIO.OUT) p = GPIO.PWM(servoPIN, 50) # GPIO…
Hamid Rajabi
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Prescaler and period values for PWM in STM32

I am using STM32F103C8Tx and I am trying to create a PID adjustable PWM. In PID I will be giving values to PWM from 0 to 100 to set the duty cycle. That means my counter period needs to be 100 in Cubemx. Because as I have learnt while I am changing…
Günkut Ağabeyoğlu
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Why is my RPIO servo pulse width off by a factor of 10?

I am working on driving motor controllers using a Raspberry Pi. I am using the RPIO library to give me the precise timing I need. I am not using the RPi.GPIO. When I run this code: from RPIO import PWM from time import sleep servo = PWM.Servo() #…
Waldo25
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ATSAMC21 PWM Duty Cycle stuck at 99%

I'm trying to use the PWM of the ATSAMC21E18A. Although, no matter the parameters I set with the function "pwm_set_parameters"; the duty cycle stays at 99%. I even try to build an easier project, which I created by https://start.atmel.com/. I only…
Antoine Boré
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