Questions tagged [pulse]
A pulse in signal processing is a rapid, transient change in the amplitude of a signal from a baseline value to a higher or lower value, followed by a rapid return to the baseline value. There are many examples of a pulse function including: Step/rectangular pulse, impulse/dirac pulse, triangular pulse, sawtooth pulse, sinc pulse, Gaussian pulse, etc.
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Generating a desired pulse train in Xilinx ISE software
Need some help with VHDL and FPGA since I am new to it.
I have a Virtex-4 FPGA and I wish to generate a binary pulse train of 16 pulses from FPGA using VHDL programming. My desired pulse train will ...
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RMS vs DC(mean value) when calculating power of pulsed or rectified signals
When I have either a rectified signal (like the unfiltered rectified sine wave out of a diode bridge) or say a fast pulsed signal feeding a LED and resistor, in which both the DC component and the RMS ...
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Pulse reset line with long press of a button
This question is a variation of How to trigger reset at long press of button.
Namely, I need to pull down a reset line with a short pulse of X length, if a button is pressed for Y>=X or more seconds. ...
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How to read a treadmill ear clip pulse sensor
There are many inexpensive ear clip pulse sensors such as this one available with a standard 1/8" audio jack. I would like to know how to read this sensor with a microcontroller and calculate heart ...
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pulse amplitude modulation
Im bit struggling with PAM question. I've been trying to solve this for few hours but I am stuck at the stage where I need to sample \$m(t)\$.
Could you please help me with detailed answers and ...
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Understanding the relationship of Pulse and Stepper RPM
I have a pretty simple script that I'm using to control the RPM of my stepper motor:
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CML signal to ground terminated line or peak sensing ADC for short pulse
I'm currently designing the prototype of a timing instrument. One sensor gives an analog CML (current-mode logic) signal, from an amplifier (ADN2880). One end of the pair is routed to a comparator (...
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Count the number of flashes on a yellow LED with 1-wire
I would like to count the number of flashes generated by a yellow LED in my Schneider Me4ZR power meter. This power meter produces 100 flashes for every kWh. I would like to use One Wire protocol to ...
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How do I connect a 555 timer to a CMOS Input?
I designed the following circuit, using a 555 timer, to supply a single trigger pulse with the same width to digital circuits, no matter how long the button is pressed. The actual pulse output works ...
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Filter 5v pulse from micro input
I am monitoring an external system which sends out a 5v pulse every 2 seconds when in normal mode. When the motor is working, it sends out a constant 5v designed to power a flashing light or LEDs as a ...
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Chip to cause a delay in a pulse [closed]
I was looking to get a delay in a pulse output.
Is there some IC I can use to be able to change the time of the pulse output?
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Short-burst powersupply
I want to create a strobe light with an LED strip, so I can use a DSLR with a longer shutter time to measure the speed of a plastic bb accurately (distance between the 2 images divided by the ...
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pulse voltage drops trying to connect 2 devices
Hi I try to connect 2 devices. The first one sends a pulse to the second. The second has a 3.3 V input. And the output pin from the first device has a voltage of around 7.3V. VCC of the first is 12 V.
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Holding voltage high, for monostable 555 timer pulse
I want to know if there is a simple (and cheap) way to make a momentary button (for which we cannot control the time it holds when pressed!) press to virtually hold for about 1-2 seconds.
More ...
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How to clamp a signal?
There is a DAQ system where one of the input is measuring pulses.
As in the figure the pulse signals are coming through a BNC cable entering into very small box called "8V clamp"
and leaving this ...
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Automotive circuit works but with lots of heat. Is there a better way?
The Problem
I have a vehicle that is ‘smart’ enough to detect when a trailer is attached. When a trailer is attached it changes ABS and vehicle stability control parameters, turns off the reversing ...
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555 timer - Creating a 5 second astable pulse
I need to a clock pulse where each pulse last 5 seconds for a traffic light controlling system assignment. I haven't worked with the 555 timer much and I haven't had any success with this. I used the ...
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Limit Number Of Pulses From 555 Or Similar
I need as small a circuit as possible that can produce 2 pulses (say maybe 200 milliseconds long and apart) when I press a button. My thought was to use a 555 timer and set it up for my desired pulse ...
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Circuit to emulate 2/3 button presses
I am attempting to build a simple circuit to to control sound on my Android phone. All the controls are accomplished by tying a control pin to ground, so all I do in between is just about resistance ...
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What should be the sampling frequency for a square pulse train in a DAQ system?
Since a square pulse has very high harmonics how to obtain a good resolution of pulses? For example if we have pulse train around 500 Hz could we treat it as a typical analog signal and sample it with ...
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Allowable ampacity through cable
For an application we are considering pulsing a current through a conductor.
The conductor have an ampacity rating of 12.5A for continuous operation.
During the pulse we get currents around 25A and ...
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How to generate a short (µs) high power pulse
I'm faced with the following problem. I would like to send a current pulse of about one amp through tissue with a resistance of about 3000 ohm (so I need 3000 V obviously).
The pulse should be as ...
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PSUs click and fail to supply power
I have two regulated 12V 12A power supplies that I want to use to provide switching power to some resistive loads. I currently have them hooked up like this:
simulate this circuit – Schematic ...
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Simple circuit to give a pulse to a IC pin once?
I have an IC that is activated when pulsing a pin high, the pin should be keep floating after the pulse. The circuit is powered using a battery, and that IC then wake up everything else (Regulator, ...
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From pulse height to number of electrons
Assume that there is a pulse on a scope with \$100\;mV\$ height, as shown in picture
This pulse is coming from a photomultiplier tube. How to determine the number of electrons from which this pulse ...
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Why do my outputs look exactly the same for the Allegro 3901?
I am trying to capture results shown in Figure 8 of Allegro 3901 data sheet .
My circuit looks like this:
The channels above coresspond to the oscilloscope screen captures below:
In the image ...
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arduino pulse to transistor power maximum
Hello I want to get a confirmation that what I am doing is not going to fry my Arduino Mega.
The sketch I am using to send a pulse out on pin 8 to a 2n3055 that is switching 12 volts is this:
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High power pulse generator
I'm designing a relatively high power pulse generator.
Basically I have a microcontroller generating a clean square wave (0-3.3 V or 0-5 V) which then goes into my amplification circuitry. I want to ...
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P-Channel Depletion Mode MOSFET for Negative Pulses
Would a p-channel depletion mode MOSFET make the most sense if the goal is to produce a high-voltage negative square pulse?
My reasoning:
MOSFET, because we're talking about a kV square pulse with ...
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Arduino beacon for IR Seeker v2 (Mindstorms NXT Sensor) - Pulse IR at 38Khz Carrier and 1200 Frequency
I hate to ask a question like this, that is kinda just like "give me the code" but seriously. I've tried reading up on it everywhere, and I just don't seem to get a thing of having both a carrier ...
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Generate DC pulse after switch turned off?
I've got a power source (say 12V DC) that I'm monitoring with a relay. I want to send a pulse (over 5V DC) to another relay for 60 seconds after the first power source has been turned off.
A ...
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Time of flight difference in hardware
I have an ultrasonic emitter, and two ultrasonic receivers. When the emitter emits a pulse, the receivers get the signal at different times. I am only interested in the difference between the two ...
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