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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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Read RC PWM signal using ATMega2560 in Atmel AVR studio

I am trying to read several PWM signals from an RC receiver into an ATMega 2560. I am having trouble understanding how the ICRn pin functions as it appears to be used for all three compare registers. The RC PWM signal has a period of 20ms with a…
deanshanahan
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ADC through PWM signal problems

I am using an STM32F100RB at the moment and I am trying to read a value from a potentiometer and to display it through the PWM signal. The problem I have is where I am connecting them I think. The PWM signal is generated through this…
Alex
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Sofware pwm as linux kernel module

I need to implement PWM-module for linux kernel, it should be high resolution ( will be cool more than 10kHz on my 400MHz ARM cpu) Can anyone give me an advice, what I can use for that purpose? Kernel version is 2.6.28.9. Device hasn't a harware PWM…
Dcow
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Why I am always getting Zero PWM output?

I want to output two different analog values with 10 bit resolution i.e. dac_value ranging from 0-1023. I am using ATmega16 with external crystal 4MHz. I have also tried connecting RC filter at output but nothing changed. I am constantly getting…
Yash
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Arduino - PWM MOSFET?

I have a bit of a problem that in hoping someone can shed some light on. I have a 4 wire fan (from a power mac g5) and I found that the pinout is positive, negative, PWM and rpm output. It's a bit strange in that the 12v must be connected constantly…
DerekOS
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attiny85: example of OC1B/!OC1B output?

I have a piezo transducer hooked up to 2 of my attiny85 pins, and I'm driving it via software in AC mode @4khz using a timer and interrupt. I would like to switch this over to a hardware solution (no interrupt) using OC1B/!OC1B (PB4,PB3), but I'm…
protoc0l
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Pulse Width Modulation using VHDL

I'm trying to create a PWM generator using a 100khz clock and PWM ranging from .6ms to 2.4 ms but I'm stuck implementing this into vhdl I've been trying to use a state machine to do this but it has become more complicated than it should. library…
zach thomas
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PWM controll on digital pin 3 Arduino Due (C)

I'm trying to control a fan on my Arduino Due board with Arduinos own motor shield and I have encountered a problem. I want to send a PWM signal to my fan, and here comes the problem, pin 3 is channel less.. What I can find there is no channel for…
Yllemanen
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performing infinite loop while awaiting input

I have a little project I'm working on, it's fairly simple so I'm hoping someone can help me. I'm using a raspberry pi to dim a single LED with some very crude PWM. my PWM code looks like this: import RPi.GPIO as GPIO import…
Byron Hill
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STM32F4 PWM ramp

I'm working on a project where I want to ramp the pwm duty cycle from 0 to 50%. My period is 16000 counts or 1ms (16MHz default timer count). For some reason, instead of updating the duty cycle each period, it updates it much slower. I wonder if…
oboist B
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Using 4 16bit timers for 400hz PWM

I'm dealing with arduino mega based quadcopter and trying to make PWM frequency for 4 motors - 400hz each. I've found an interesting solution where 4 ATmega2560 16bit timers are used to control 4 ESCs with PWM so it could reach 400hz frequency. 700…
user3081123
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PWM read with Arduino MEGA and Ethernet Shield

I'm on a project in which I must read the DC (1ms-2ms) of 16 PWM signals with 4 Arduino MEGA 2560, 4 PWM for each one. After have read it, I should send the 16 values to a computer. The initial idea was to use 4 Arduino Ethernet Shield connected to…
user2956741
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How to make a block force a simulation step to occur at a given time?

Question Is there a way to make a block force a simulation step to occur at a given time(s)? For instance, even though the user chose a simulation step size of 1e-2 in his model (fixed-step simulation), if he uses my block then a simulation step…
JLagana
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Arduino Uno same frequency on ALL PWM pins

I'm controlling a BLDC motor with an inverter/driver IC doing the switching work. I need to provide 6 PWM signals for the driver all at the same frequency. The exact frequency doesn't really matter, as long as its between 5kHz to 10kHz and all the…
Pato88
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CCP module - PWM mode

I'm trying to make a PWM output with this code, but apparently something is missing. Because when I check the Logic Analyzer in MPLab, nothing happens on CCP2 output. I'm working with the pic18f25k80. void main() { // Set up PWM CCP2CON =…
PlatonInc.
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