All Questions
26
questions
0
votes
1
answer
98
views
What is the structure and type of harmonics generated by a very differentiated square wave (i.e bipolar spikes)?
this question is in two parts.
Firstly, can you please tell me what the structure and amplitude distribution is of harmonics generated by a differentiated square wave of 50% duty cycle, where the time ...
- 3
1
vote
0
answers
192
views
Pulse generation using Timer counter in ATMEL SAM3x8e Arduino Due
I am using the ATMEL SAM3x8e chip on an Arduino Due. I want to generate two pulses of frequency 100 kHz of the pattern shown below (1 period shown). For this I used TIOA8 and TIOA0 lines in the ...
- 406
0
votes
2
answers
336
views
i2C controllable pulse generator [closed]
I am trying to build circute where I can generate single pulse having width ranging from 1ms to 50ms and I would like to be able to control the width via i2c.
what I have done so far was using LED ...
- 3
0
votes
2
answers
361
views
How can I shorten the width of a pulse?
I am exploring ways to shorten the width of the ON-time of a PWM signal while keeping the switching frequency constant. I intend to use S1 as the signal to the Enable/Disable pin of a gate driver IC ...
- 29
0
votes
2
answers
135
views
Logic analyzer gives me much more pulses than expected
Let me start the question by saying that I am using a logic analyzer for the first time, so I am probably doing something wrong.
I sniffed the signal that goes to a speaker. The signal is probably PWM....
- 1,369
0
votes
0
answers
321
views
Tachometer pulses breaking down at lower speeds
I have a Noctua 4-pin PWM fan (PWM datasheet) from which I'm attempting to calculate RPM using the open collector tachometer output. I'm producing the PWM waveform using a Raspberry Pi Pico.
Here's ...
- 143
0
votes
0
answers
74
views
Interrupt trigger on presence of a pwm signal
In order to detect the presence of a pwm signal using a microcontroller from an external sensor (an interrupt), say the sensor is a hall sensor rotary encoder that is used to count the number of ...
- 63
0
votes
3
answers
2k
views
Stepper Driver pulses control (with Arduino)
I intend to control the speed of a stepper motor thanks to a driver connected to Arduino (Mega).
Basically the driver has, among others, 2 pins, PUL+ (Vcc) and PUL- (GND, common cathode), and each ...
- 281
0
votes
0
answers
244
views
Adding delay to pulsed signal in matlab code with PWM block
How can I generate a pulsed (rectangular) signal such that, total period = 500ms (simulation time); clock frequency = 10kHz; pulse should occur every 20 ms. Duration of the pulse is the clock period ...
- 1
0
votes
1
answer
1k
views
Generate a fixed number of pulses on the STM32F4 PWM
I am trying to control a servo motor (link). It is a brushless DC motor with an interface similar to a stepper motor.
The motor rotates for a defined distance based on the number of pulses it ...
- 583
0
votes
2
answers
98
views
Arduino - Not outputting 2 separate signals
I’m trying to get an Arduino to output 2 signals with different frequencies for a project.The schematic of the circuit is shown below.
I’m trying to experiment using Pulse Width Modulation to give me ...
- 281
0
votes
1
answer
123
views
VF PWM for varying frequency reference function
I am new with PWM methods and there is a subject that I cant find an answer to and decided to ask here.
For a varying frequency PWM (VF-PWM) I have found that by using the following spectral ...
- 137
1
vote
1
answer
139
views
Why does a Solenoid driven with intermittent duty cylce produce higher force than with continuous drive?
I'm selecting some solenoids with my MechE and I noticed something that I didn't have an intuitive explanation for.
We were looking at this solenoid and noticed that at the bottom the forces ...
5
votes
3
answers
2k
views
PWM, PAM, PCM sine generation and usage confusion
I am confused about something fundamental regarding PWM, PAM and PCM. I am going to be using a speaker's driver analogy to explain my point. As far as I know motors use PWM for power input, I don't ...
- 701
1
vote
2
answers
46k
views
Generate PWM Signal in LTSpice [closed]
How can I generate a 100KHz PWM Signal in Ltspice?
How do I calculate Ton and Tperiode?
- 37