Questions tagged [square]

A square wave is a non-sinusoidal periodic waveform in which the amplitude alternates at a steady frequency between fixed minimum and maximum values. The square wave is a special case of a pulse wave which allows arbitrary durations at minimum and maximum. The ratio of the high period to the total period of a pulse wave is called the duty cycle. A true square wave has a 50% duty cycle (equal high and low periods).

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15 views

Running a BLDC Ceiling Fan on an Off Grid DC System [migrated]

first post here and I'll start by saying my electrical knowledge is limited at best. So I'm building cabin/weekend house and attempting to run the entire house, at least for the time being, on DC. ...
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2answers
81 views

555 Timer with 50% duty cycle

I've seen below 555 circuit which produces a square wave of 50% duty cycle. I am quite new to electronics and I saw Ben eater's 555 timer tutorial where he used discharge pin for capacitor discharging....
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64 views

Photodiode square wave positive duty cycle lower and lower

I drive an IR LED with a 50% duty cycle square wave and receive its signal with a photodiode. If I take the photodiode farther and farther from the LED, the signal's positive duty cycle is lower and ...
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56 views

Timer 555 AC square wave

Im currently trying to build a square wave circuit using the 555 Timer (see picture). Currently it is producing a square wave between 0 to 5V, duty cycle is about 50% and a frequency of about 50kHz. (...
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1answer
103 views

Why does my output get supercompensated?

I have almost finished a project that was supposed to output a square wave signal with a certain frequency but when I tried to make a small change to the circuit something weird happened to my output. ...
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2answers
65 views

Variable frequency pulse train generation

I wanted to create a pulse train of such a kind that the first pulse is high for a time=4x, then the next pulse is on for x, and the next for 4x... and so on. (without using microcontrollers/...
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74 views

Small output offset in square wave generator using LM741

I am building a square wave generator using LM741 just like in this Falstad simulation. My problem is that the output has a small offset and I don't understand where it comes from. When measuring ...
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2answers
63 views

Square wave frequency upsample with crystal oscillator

I'm trying to accomplish the following without the use of a microcontroller: Input: A square wave with a 1 Hz period, duty-cycle of 100 ms (10%), normally low. Output: A square wave with a 100 Hz ...
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1answer
228 views

Why does the output of my astable multivibrator using an op-amp turn into a triangular wave?

I've designed an astable multivibrator for square wave generation using the LM741 op-amp, as showen in the following image: Now I've played a little with the frequencies it can output. As shown in ...
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2answers
70 views

How to limit the output voltage of an op-amp astable multivibrator

I'm trying to make a square wave generator with an adjustable range of output signal amplitude (between 0 and 5V) using an LM741 op-amp and the following circuit: The thing is, VOUT is limited by the ...
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1answer
86 views

Why is Vout less than Vcc here in a way disproportionate to beta? [closed]

Given: Vcc=9V, duty cycle = 0.5, oscillation frequency=500Hz Note that I am not interested in electronics in any way (I'm planning to continue as a web developer yet need to finish my CCE major) so I ...
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3answers
1k views

Precise square wave generator 32768 Hz

I need to create a circuit to generate a square wave with 50% duty at 32768 Hz +/- 5 Hz. The output of the circuit will drive an NPN transistor ( 0.2 A , 24VDC ). The cost of the component is not a ...
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1answer
72 views

BJT twin transistor astable multivibrator always outputs high

Noob here (again). I have made this schematic of an astable multivibrator and a Raspberry Pi. I want it to produce a square wave, but it just outputs high constantly. I use the Raspberry Pi as a ...
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1answer
103 views

Converting 5V Square-Wave to +-5V Square-Wave

I am a student electronic engineer and was hoping to get some guidance on a project that I am working on. I am using the AD9850 module to output a 5V square-wave at 1.1MHz as can be seen in the figure ...
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3answers
105 views

1 kV square wave generator [closed]

I am looking into building a calibration kit for HV differential probes. The approach I take is to inject the square wave at the input of the differential probe and trim the trimmer caps to compensate ...
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1answer
87 views

Underdamped bipolar square wave with Arduino [closed]

I want to ask about a 30 Hz (decaying square wave) underdamped bipolar square wave.Also this is used for demagnetization. The photo of the output is shown as below. Could you help me to construct? Any ...
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91 views

Tuning Op-Amp Integrator for Triangle Wave Generation

I'm trying to simulate an op-amp integrator that can generate a triangle wave from a square wave. Unfortunately, my waveform is anything but triangular; if anything, it's another square wave with a ...
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1answer
94 views

Need to supply 4 square waves (at 4 different frequencies-600,800,1000,1200 Hz) to 4 IR emitters at the same time using any microcontroller [closed]

I need to design a circuit to supply 4 square waves at 50% duty cycle (at 4 different frequencies-600,800,1000,1200 Hz) to 4 IR emitters respectively at the same time using any microcontroller. Could ...
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1answer
97 views

Jump in RC current response to a square wave

Periodic square wave feeding an RC circuit: I am currently studying RC filter response to a square wave input with a period of \$ T_1 + T_2 \$. I have understood about voltage expressions and current ...
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2answers
117 views

Playing around with an astable multivibrator

I had a doubt regarding the astable multivibrators using BJTs. This is a typical astable multivibrator. I have been told that if I connect a capacitor to the output channel, there would be no ...
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3answers
40 views

Running a signal generator and signal dependent load on the same power supply

I want to use a square wave generator to drive a load in the same circuit but I am confused about how to do so. Here is what my current circuit looks like: simulate this circuit – Schematic ...
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2answers
64 views

Transformer output voltage not rising with input voltage

I recently stripped a microwave of its transformer and I was looking forward to playing around with it. I didn't want to plug it directly into the wallsocket so I decided to design a circuit that can ...
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1answer
71 views

LF353 for 12-0V square wave from arduino

I have built the following circuit with an LF353N op amp and expecting 0-12V outputs from it. I have built it on a breadboard but the output is always around +12V except the when the (+) input is ...
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2answers
107 views

Circuits that can generate a square wave current

I was searching around for circuits that could generate a square wave and I noticed that they all have only one output and can't generate a current. For example: Now, measuring across the positive ...
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1answer
70 views

How could I give a square wave input to a circuit using NI-DAQ-USB-6001 and LabView? How could I read the peak to peak voltage using DAQ-USB-6001?

I need to give a square wave input to my filter circuit using Ni-DAQ-USB-6001 and LabView. Could someone help me with how can I do that? I also need to read the filtered wave and peak to peak voltage ...
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76 views

Why TL071 Does'nt Act As a Comparator?

I am trying to obtain a square wave using a comparator and a sine wave signal. Sine wave has adjustable peak to peak amplitude with +10/-10 volts as limits. TL071 runs with +12/-12 volts. Sine wave ...
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1answer
141 views

Amplifying pulse from 4 V to 24 V

I currently have a problem where I want to amplify a 4V square pulse signal to a 24V square pulse signal, for a Q-switch input. I tried using op-amps (LM358N) in a non-inverting amplifier ...
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3answers
323 views

How to create square wave circuit

I wanted to create a square wave that alternates between positive and negative voltage with a full cycle time of 8ms and a 50% duty cycle. So is there a way I could make a circuit that takes in 0V and ...
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1answer
64 views

TimerBlox LTC6992 PWM variable clock generator at 2.3MHz... out of tolerance or used incorrectly?

The TimerBlox LTC6992 (https://www.analog.com/media/en/technical-documentation/data-sheets/LTC6992-1-6992-2-6992-3-6992-4.pdf) is a PWM chip specified to have a master output frequency maximum of 1MHz,...
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55 views

Back to back MOSFETs and current sensing

I am looking into a circuit which has to do the following. A square wave goes in and a square wave goes out. I need to measure the current of the outgoing side because it is likely that the the load ...
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1answer
60 views

Use of coupling capacitors in transistor biasing

I'm trying to use oscillator circuit to switch on the MOSFET and using coupling capacitors to isolate the DC biasing. Below is my circuit and graph I'm not able to understand the DC biasing here. ...
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1answer
59 views

Generate Square Wave with Fast Rise Time for Testing

I'm looking to economically generate a 1-2 GHz (configurable) Square Wave with a rise time of 200ps (or faster) to test the performance of various active scope probe designs. I don't need to be able ...
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1answer
41 views

LFO Triangle to Square wave peak distortion

I put together an LFO based off the one in the link below. I swapped out the op amps in the schematic for 741 op amps. Everything works fine, except for the square wave. This is supposed to be the ...
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1answer
34 views

Output a pulsing signal when input is high/low

So I have a proprietary system that outputs high when there is an error, and low when there's not. I want to put this signal onto a D flip-flop clock, so that if theres an error, my system clocks a ...
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2answers
416 views

Phase shift a square wave

I have an application where I would like to derive a secondary square wave from a primary one but with a continuously variable phase shift. I would like to know if this is possible to achieve in a ...
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0answers
44 views

How can I use a square wave to interleave 2 LEDs with an arduino?

I have a PCB that drives a camera. I want to flash 2 LEDs in time with the camera's framerate using an Arduino. After some examination I found a CLK pin on the PCB that I think might correspond to the ...
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7answers
2k views

Why can a square wave (or digital signal) be transmitted directly through wired cable but not wireless?

Like ethernet cable, optical fiber. We have a square wave signal, do we just send that squre-wave signal directly down along the cable? If we do send it directly, why we can not send the square-wave ...
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1answer
339 views

How can I explain the unexpected negative voltage in the output signal obtained from half wave rectifier?

I observed the output signal of half-wave rectifier sending sine wave and square wave for an experiment. The rectifier was built with a 1N 4001 diode and a 100 ohm resistor. The output signal across ...
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3answers
281 views

What is the reason the output signal I obtained from full-wave bridge rectifier has changing amplitude?

I observed the output signal of full-wave bridge rectifier sending sine wave and square wave for an experiment. In both of the output signals it is clear that each cycle shows one of the two different ...
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1answer
61 views

Square wave from high voltage power supply (5kV)

I working on a project involving dielectric elastomer actuators and need to generate a square wave from a 5kV power supply (SRS PS350). The operating frequency will be 0-50Hz. What's one circuit I ...
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1answer
57 views

Obtaining frequency of 550 Hz from Simple Triangle and Square Waveform Generator Circuit

First time asking a question so sorry if I miss some things. I'll try to be thorough and straightforward. I'm trying to design a square wave from a triangle wave-square wave generator circuit. The ...
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3answers
120 views

How do a generate a clean, precise pulse wave electronically without jitter?

I am trying to build a simple pulse generator circuit for electrophysiological stimulation purposes. It seems to be surprisingly difficult to generate a square/ pulse waveform where the pulses have ...
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0answers
88 views

How to improve a high frequency square wave for laser imaging

I am trying to create a current source for laser direct imaging and I have a problem in the circuit I cannot solve. The laser is a 120 mW 405nm diode and I use it in a laser module from a laser ...
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5answers
788 views

High Frequency Square Wave Generator

I want to generate square wave but there are some challenges. Rise time should be less than 2ns as well as fall time (for 0V to 5V). Duty cycle is not so important it should stay high like 40 ns. I am ...
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1answer
241 views

Rise time of 6N136 opto-coupler

I am trying to use below circuit for convert 24VDC high speed pulse to 5VDC pulse that can interface to a stepper driver IC. I have used 6N136 opto-coupler and according to its datasheet it can handle ...
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3answers
262 views

Precision amplitude 600kHz square wave generator

I'm looking for a circuit that creates a precision amplitude square wave of 600kHz (50% duty cycle). The amplitude of the square wave needs to be 3Vpk-pk +/-10mV, but can be DC offset. The output of ...
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3answers
165 views

Using LC oscillator to create square wave AC [closed]

A full wave bridge inverter lookslike this: simulate this circuit – Schematic created using CircuitLab However this isn't practical because we have turn on/off the pairs of switches every time ...
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1answer
264 views

how to give dc offset to the square wave from 2.5 v to -2.5 to 5 to 0 volt?

a)I want to change my square wave signal from -2.5 to 2.5 volt to 5 volts to 0 volts? actually this will be given to MOSFET driver ir2110. b) In the first picture, it is my original square wave coming ...
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2answers
317 views

How do I calculate the root mean square voltage of a square wave (with drawing)?

I need to find the root mean square voltage based on this drawing, knowing that the period (T) is equal to 6 seconds, and the voltage (V) is equal to 14 Volt. I know that the rms can be calculated ...
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2answers
460 views

Square wave oscillator on PSpice simulation

I'm new to PSpice and here I was trying to simulate a square wave oscillator using a LM193 on PSpice. Here is the circuit that I've created there: Edit: The capacitor C1 has an IC set to 0 However, ...