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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54 views

How to convert high AC voltage generator to DC voltage to charge a capacitor

I have bought several high voltage generator which outputs AC voltage. I wish to convert this high AC voltage to DC voltage to charge a capacitor. I have tried connecting the output (10kV) to a 20kV ...
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Bi polar pulse magnetizer controlled by arduino

Hello, I am trying to make a bipolar pulse magnetiser based on the pulse magnetizer design on instructables. I attached my circuit design as image. g1 and g2 terminals of the thyristors will be ...
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How does a “pulse dialer” (e.g. IN9151) internally work?

I'm wondering how a so called "pulse dialer" like the IN9151 (https://www.digchip.com/datasheets/parts/datasheet/237/IL9151-3N-pdf.php) internally works, meaning how it is achieved to ...
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53 views

Creating a 1PPS signal froma a 10 MHz CMOS Output Signal

Is it possible to "create" a 1PPS signal using an Agilent 8165A signal generator? We currently don't have a way of testing a 1PPS signal directly, so we're looking at "making our own&...
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92 views

Simple circuit for a single 10 ms pulse when closing a contact switch

I have a simple circuit (see image below) that creates a single 10 ms pulse when closing a contact switch (SPST) but I also need that after generating a pulse the circuit will wait some time (500 ms ...
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46 views

How to eliminate electromagnetic interference when counting pulses using a micro controller?

I have written a pulse counter program for ESP32 micro-controller, the counter counts the pulses correctly when there is no EMI interference but as I turn on the small AC drill machine the counter ...
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1answer
64 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 ...
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70 views

Separating odd and even pulses in a pulse train

How would one go about separating odd and even pulses in a pulse train and displaying them using LED indicators? A schematic would be of great help.
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Low-pass (band-pass) filter for op amp circuit

I have a circuit that amplifies a one-shot inductive trigger pulse of about 1.3Khz (@780 micro sec period) from about 10-200mV to about 3-4V. Between C1 and R3 there is a 0.13uH inductor coil with 11 ...
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42 views

Amplify and convert negative pulse to positive pulse

I am looking for design recommendation. Attachment is the block diagram of the system. We have a single photon detector (SPD) (https://www.idquantique.com/quantum-sensing/products/id281/) outputting -...
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34 views

Using SPST Switch as Button using Capacitor, which type?

Before I start, know that I'm still very much a beginner at electrical engineering. I'm building a switch box to be used for PC simulators using mainly (non-momentary) SPST switches and a USB encoder. ...
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84 views

How do I amplify a square wave pulse of 4 to 8 periods at 3.5 MHz from +-2V to +-60V or more?

I am working with ultrasound sensors optimized for 3.5 MHz signals, and I want to test these using my PicoScope 5000 with integrated signal generator. The PicoScope is able to generate arbitrary ...
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53 views

Build a circuit that will output an analog voltage proportional to the duration of a pulse at the input (pulse-width detection ) CMOS

I don't have a strong background in electronics, so this task is challenging for me. I need to build a circuit that will get an output like this. In my circuit, I can only use voltage sources, ...
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116 views

Designing an EMP Generator for school :^)

How would I go about calculating and designing a circuit that can produce an axial magnetic field greater than 20 Tesla for about 1.4 μs (full width at half maximum). The dimensions of the solenoid ...
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2answers
126 views

Scope says 59.9 Hz .. yet I can't measure turntable speed

I needed to measure a turntable's number of revolutions per minute, but didn't have any incandescent lamps around. So I rigged an LED to an ESP8266 SOC and programmed it with delays to output a 60hz ...
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simple way to get a single pulse using a cd4060?

Wondering what what be the easiest (least component count/passives only) of getting a single pulse from a CD4060? Looking for a delay of about 10 seconds generating a single pulse of about .25 second ...
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72 views

How to select the right HV pulse capacitor?

I'm planning to discharge a 1500VDC 150uF~250uF capacitor into a coil 20 times per second. I've found a few capacitors that might do the work, but I have some questions about their charge/discharge ...
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261 views

Generation of a shorter pulse based on trigger (similar to 555 as monostable)

I need to create a shorter pulse based on a trigger signal. Trigger signal has a duration between 1 to 10 ms and the desired output should be 0.5 ms. To do the opposite (longer output pulse than ...
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2answers
37 views

Pulse output only from switch toggle on OR switch toggle off (not both please)

I found this circuit here from a few years ago posted thanks to tcrosley. Using the 74LS122 I found that it produces a short pulse both on latching the input high AND to low. The problem is I can't ...
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168 views

Voltage across capacitor - pulse 2a

simulate this circuit – Schematic created using CircuitLab I have this case where my V1 supply voltage is constant at 14V. The C1 capacitor now charges up to 14V and assume my capacitor C1 is ...
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1answer
45 views

How to find the exact value of K for SN54LS123

I have a circuit containing SN54LS123 (Datasheet) IC. I want to know the output pulse width but unable to figure out the value of K. The formula is PW = K * R * C. The values of K is given in the ...
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72 views

Low-complexity generation of single pulse using RC circuit from a fixed DC supply without the use of a controller

I was looking for a similar solution to this question: I want to generate a pulse (high) of 2 seconds when that DC supply is turned ON. Is there a solution where we can implement this without using ...
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46 views

What electrical attributes determine if signals from a signal generator can penetrate objects?

Lately, I've been reading about all kinds of signal generators (pulse generator, arbitrary function generators, arbitrary waveform generator, waveform generator, frequency sweep generator, PEMF signal ...
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41 views

How to calculate PAM signal power spectrum

How to calculate power spectrum of given signal
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68 views

How do you get a short pulse out of a sustained high?

I am trying to get a half-second pulse out of a long/permanent high pulse. I am still new to electronics and think a capacitor would be involved? I want to use CMOS logic level. Accuracy is not too ...
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198 views

Drop-out pulse test

I have a switching MOSFET circuit. Input to the switching MOSFET circuit is 11V at the drain. The gate is connected to a function generator. 5V peak-peak, frequency = 1kHz, 1ms (time period) & ...
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64 views

Selecting a Capacitor for Pulsed Power

Background: I'm planning on making a hard tube modulated pulsed power supply. This will use a thyratron set to trigger at a frequency of 6 Hz, a 60 nF capacitor bank, and a 0.625 mH inductor. The ...
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53 views

How to pull a normally floating pin to ground for 500ms when circuit powered on and circuit powered off [duplicate]

I need some help designing a circuit to pull a floating pin to ground for approx 500ms when the circuit is first powered on, then pulling it to ground again for another 500ms when powered is lost. The ...
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34 views

How to relate the sampling frequency to the measurement error for this kind of pulse period measurements?

I sample a zero to 400Hz varying pulse train at 4kHz and post-process this pulse train data by MATLAB to obtain each single pulse's period. So for instance below represents a 0 to 6V pulse. The green ...
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2answers
78 views

Rated power vs. temperature for resistors

As you know, there is a Rated power vs temperature curve for resistors in datasheets like the image below. For DC inputs, I think everything is clear about power. My question is that for pulse inputs,...
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221 views

Removing voltage spikes and overshoots using power MOSFET as switch and 555 timer as pulse generator

I'm trying to turn on a power LED using LM555 timer as input signal of IRF630N N-channel power MOSFET as Fig1. Fig1. pulse generator and switching circuit. Here is the output of LM555 Timer (Not ...
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66 views

8000 Amps across a 1 A diode for 0.2 uS

Assuming that the diode is rated for 20 kV and the pulse is only 250 V, will a 250 V 8 kA pulse that lasts 0.2 uS break a 20 kV 1 A diode? This also assumes that the diode recieves 10 of these pulses ...
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53 views

Using a cap to predict the presence of a pulse via voltmeter

I have a pulsed power supply that provides 250v pulses with a pulse width of 2 uS and a frequency of 10 Hz. However, I'm unaware of the polarity of these pulses. In order to detect the polarity of ...
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2answers
152 views

Python to trigger USB square wave pulse for camera

I'm sorry if this was posted somewhere, but I'm trying to trigger a FLIR camera for acquisition using a USB port. I already purchased a USB split cable, and have queried the ports, so I know exactly ...
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25 views

Measuring Forward Impedance of a pulsed drive circuit

Background: I recently built a thyristor driving circuit to supply a set number of trigger pulses to my thytratron (tetrode configuration). The spec sheet for the thyratron requires that my driving ...
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49 views

Confusion with the meaning of the terms for this pulse train output device

I cannot find an online manual but there is a device which is outputting voltage pulse train with respect to its rotation speed(a windmeter). Normally the frequency of the pulses are read and ...
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82 views

Pulsating a vibration module using purely an analogue circuit

I have a simple analogue circuit I'm trying to create. Essentially it's a 1.2V power source that pulsates a vibrator motor - without a 555 timer. When the circuit is closed, uninterrupted current is ...
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2answers
79 views

Can I get Pull-push pulses to a PC?

Is there any way to connect a sensor that outputs pulses in a PC system? For instance, it can be connected via raspi via the GPIOs. Is there another and most robust way to get the input to a PC?
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66 views

Parameters for VAC 5046-X005 gate pulse transformer

I'm trying to parameterize this device to find a suitable equivalent. Trouble is, there seems to be no datasheet available, and one of the two secondaries are measuring open, so complete measurements ...
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6answers
509 views

Is there a way to make an LED blink using a passive circuit?

I am trying to make a simple flashing LED toy to get a 5-year-old boy interested in electronics. The LED should blink for the shortest time possible Remain off for several seconds between flashes The ...
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1answer
357 views

Power Latching Relay off/on in response to 12V ignition and 1 second ground pulse

I have the following sample schematic of a 12 volt automotive circuit to trigger about 60 seconds of power output to a latching relay on output pin 3 of the 555 Timer chip. The schematic below is a ...
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5answers
502 views

pulsed current with 200 kHz squarewave signal

I use this circuit to obtain pulses as close as possible to the input signal pulses on the 1.5 Ohms resistor. The MOSFET is FPQ50N06 and the transistor is BC239. The circuit gives good results on 25 ...
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56 views

Generate identical positve going and negative going pulses/spikes at the same time

I am interested in building a circuit to generate a sharp positive pulse and an identical negative pulse at the same time with a peak of about 10 to 200 V. So when I say sharp I would like a rise time ...
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54 views

Wiring a Mosfet for Pulses

BACKGROUND: For sometime now I've been in need of a pulsed power supply that can put out 200 V pulses with a minimum pulse width of 400 nS. After researching effective switching devices, I decided ...
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1answer
110 views

Gaussian filter circuit

I want to convert a 10 MHz train of square wave, 3.3 V to a Gaussian pulse train of the same frequency and amplitude. This Gaussian pulse will be sent into an electro-optical modulator where it ...
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1answer
193 views

Generating analog signal (PPM) Raspberry Pi

I am trying to generate a PPM signal like the one used by RC receivers, using a raspberry pi. I am using the pigpio library. Here's what I have so far. Here's the header file: ...
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62 views

Making a 200 V pulse supply

I'm looking to build a power supply that can continuously create pulses of at least 200 V (no more than 300 V). These 200 V pulses must have a pulse width of 0.4 uS. Each pulse should have a rise rate ...
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87 views

What could be the reason for this flickering of this periodic pulse train?

I try to create periodic pulse train for the clock signal in application. I use an arduino nano board. But I noticed in scopes I see flickering pulse train behaviour. It is very hard to explain this ...
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2answers
185 views

How to extend a pulse in system verilog

I am trying to make a very simple module in System Verilog that receives a short pulse as an input, and returns as an output a pulse which is twice wider. For example, if the input is a 1ns pulse, ...
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1answer
63 views

Measure or detect high current pulse 600A+/15V without osciloscope

How to measure or detect high current(600-800A) pulse (50-100ms) without osciloscope? I don't have any osciloscope now, but i need troubleshoot one spotwelding machine. I need to know how much ...

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