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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116 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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24 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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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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76 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
77 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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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
352 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
117 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
488 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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54 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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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
82 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
70 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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3answers
79 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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64 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
59 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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39 views

RF GaN transistor biasing

I am trying to understand the difference of pulse operating. How I get there is two ways. For example. Bias procedure: Set \$I_D\$ limit to 400 mA, \$I_G\$ limit to 4.5 mA Set \$V_G\$ to -5.0V ...
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2answers
53 views

Rising edge detector negative pulse emitter - how to prevent firing at power up?

The point of this circuit is to allow rising edges to send a negative pulse to a 555 timer. C1's purpose is to allow rising edges to trigger a positive pulse which in turn connects output to ground. ...
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2answers
71 views

Why does the MAX30102 only work on a finger?

I am using a MAX30102 sensor with Sparkfun library for heart rate monitoring. It does work for a finger, but when the sensor is mounted on chest I am not getting a reading. Why is that?
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52 views

2.25 MHz ultrasonic pulse/echo

Can PIN diodes be used as T/R switches for ultrasonic transducers? I would like to drive an ultrasonic transducer with a 2.25 MHz pulse (444 nanosecond period, -100 volts) and measure responding ...
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1answer
41 views

How to interface HCSR04 ultrasonic sensor with ATxmega256A3?

I have to interface HCSR04 with ATXMega256. I am using the TCC0 Timer in Capture mode with setting it to capture pulse width, using Event System Channel 0 source: ...
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1answer
31 views

change in ac reading relative to the frequency

I'm working on a school project, just measuring the Vrms of two different waveforms at different frequencies. The function generators output is connected directly into an oscilloscope therefore the ...
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26 views

Laser Heads/Diodes vs 300v Pulse?

So I've been experimenting with lasers and whatnot. I'm wondering if I took a disposable camera charging circuit and used the stepped up voltage to quickly pulse into the laser, what mW laser would be ...
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28 views

Arduino Pulse Generation

I have a Arduino sketch that can rotate 2 stepper motor using a stepper driver that has 256 micro stepping. I used Arduino MEGA timer 1 and timer 3 with fCLK/8 prescaller for generating step pulse ...
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1answer
31 views

LT1721 pulse generator manual gives unexpected resistor values?

I've designed a circuit depending mostly on this LT1721 pulse generator, that's been thought up by the nice people at Analog: https://www.analog.com/en/design-center/reference-designs/circuit-...
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1answer
15 views

activating an EC2-3TNU with the VT pin of an HT12D

I am sending a signal from an HT12E through an rf transmitter to an rf receiver then an HT12D. This all works fine and the data signal from the HT12D is sent to a CZH-LABS D-1022A(for filling a pool). ...
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4answers
151 views

How to detect IR pulse using phototransistor and voltage comparator (subtracting constant light)

I want to detect an IR pulse with a phototransistor. I did the following schematic, using the voltage comparator LM339: The problem is that this will work if in the dark, but if there is some light, ...
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0answers
57 views

Pulse Transformer design problem: cant understand for sure whats the reason or irregular output waveform?

A ferrite core pulse transformer provided with 12V PWM signal (as primary winding input voltage) as shown in Fig-1, produces irregular output voltage across the secondary winding as shown in Fig-2. I ...
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1answer
38 views

How to use a parametric value within PULSE voltage source in LTSpice?

I would like to use a parametric symbol for the period value of the PULSE component in LTSpice but so far I have been unsuccessful. currently my source is: ...
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57 views

Rising edge detector behavior

I was looking at this StackExchange question: Why does this rising edge detector using a capacitor and a resistor work? I ran the simulation and I'm confused by the behavior. On the rising edge of ...
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2answers
94 views

How to construct a discrete circuit to send out a square wave with N pulses?

I want to build a simple and discrete circuit (without any integrated circuits) which puts out a square wave (50:50 duty cycle) with N pulses (rising edges)? For example for N=4 the output should ...
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2answers
167 views

Determining which pulse came first on an FPGA

I try to determine which of two asynchronous pulses came first (after a synchronous reset) using an FPGA. The pulses are asynchronous because they are generated from ring oscillators (running on the ...
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1answer
112 views

555 timer to drive transistors with low load resistance

Recently, I have a project that needs to heat up a metal filament with a single pulse voltage. I built a circuit with 555 timer and transistors to heat up the metal filament(0.2 ohm). The circuit ...
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44 views

How can we actually use PPM output from a RC receiver

I'm using FS-CT6B transmitter with R6B receiver. I have seen many code examples and tutorials for reading PPM output from R6B using Arduino Uno. In some of them, only one pin is used (external ...
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1answer
32 views

What are the appropriate pulse width and PRF for a pulsed Doppler sensor

I have a raw k-band transceiver, radar-based 24 GHz, motion detector, IPM-165. and here is the datasheet: https://www.innosent.de/fileadmin/media/dokumente/DATASHEETS_2016/Datenblatt_IPM-165_V8....
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1answer
54 views

LtSpice antisymmetric sine pulse

I am trying to create a pulse voltage source in ltspice. The pulse should look like a half cycle of a sine wave however the rise and fall times should be different. I can create such pulse with the ...
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2answers
97 views

what is this type pulses called?

I was wondering what is this type of pulses is call. Is it a sin wave? I know its the result of sinusoidal pulse modulation. is it considerd a quasi-sin wave? I would like to know the name to ...
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53 views

Help with my design: How can I add these voltages?

I have to design a circuit that simulates a voltage spike on a dc supply rail. The circuit has a button that, when pressed, generates a short pulse of controllable height (controlled by pot). The ...
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1answer
103 views

How to stretch 1ns pulse into a 5ns pulse?

We have a time-tagger device that records the arrival of a LVTTL signal with 0.5ns resolution. Currently the 5ns LVTTL signal is generated by a separate commercial Avalanche Photon Diode but I would ...
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1answer
68 views

How can I create a long (10 second) pulse from a short active pulse?

So let's say I have an incoming signal: 1 clock cycle from a ~1-100 MHz (50 MHz for this example) clock domain. And I want to drive an output that must be active high for 10 seconds for each time the ...
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2answers
83 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 ...
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1answer
95 views

How to increase ON Time of a Relay?

I am trying to increase the ON time of a Relay. The Relay is turned ON from ULQ2003 by a 1 Sec ground pulse on its OUT1 Pin. I am trying to increase it to approximately 3 Sec. The accuracy of pulse ...
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142 views

10ns squarewave single pulse circuit

I'm trying to design a 10ns pulse circuit that will generate a square wave, and pulse once when its triggered. It will be triggered by a push-button. It should be ...
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2answers
455 views

15kV High voltage pulse generator circuit how to have digital control?

first of all I'm fairly new to making a more complicated circuit. I'm trying to make a PCB with an ATmega328PB chip on it. And with that chip I want to control a High voltage pulse generator (Arc ...
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35 views

Neon Power Supply Voltage AC Measurement

So I was provided with a circuit which consists of a variable transformer connected to the main (essentially allows the input of the power supply to be controlled) and a Neon Power Supply (Has An ...
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0answers
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Can I use diodes to protect power supply outputs?

(Note, this is my first question on this site, please point out if there is something that I am doing wrong here.) I have a thyratron that requires two separate power lines to attach to it. The two ...
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1answer
37 views

Driver circuit calculations

I am attempting to built this circuit here: It is used by an LED manufacturer to provide pulses to a high-power LED. In my case, I'm using an ARDUINO to provide the TTL signal. I haven't sourced the ...
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1answer
49 views

FRR Measurement

When I try to measure the FRR (time delay in the rising edge of two pulses) between two channels of a GES-2074A GW-Instek digital oscilloscope, it varies depending on the time resolution. First, I ...
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2answers
198 views

Big discrepancy between theoretical and actual power through my pulse generator

I am trying to acquire some skills about pulse generation, but that's not easy. I've tried to derive the power dissipated by the input resistor in my pulse generator, but it turns out to be much ...

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