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Questions tagged [waveform]

The shape of a value (usually voltage) when graphed over time.

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35 views

Where to apply manual delay in character LCD

I went to http://www.elm-chan.org/docs/lcd/hd44780_e.html in an attempt to find out how to make an LCD module work with the shortest timings. While the site does help with the initialization of the ...
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0answers
40 views

Draw the waveform of the clipping circut?

Below is what I got as my answer to the output wave form, did I miss something? Also what is time average value mean?
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37 views

Why giving a step voltage to a DC motor doesn't show typical RL circuit behaviour?

My goal is to get an estimate of the order of magnitude of the inductance of a DC motor. To achieve this, I set up the following test circuit (L1 and R1 represent the motor, back emf is not shown): ...
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2answers
45 views

Graphical method for obtaining waveshape of current

I was doing exercises of the book Electrical Engineering Fundamentals by Vincent Del Toro. Then I saw this question. The voltage waveform shown in fig is applied separately to a pure capacitor of 1 F ...
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4answers
88 views

Is a motor-generator set a reasonable way to get the purest waveform electricity?

It looks like audiophiles go as far as installing separate powerlines to power their high quality audio systems. The motivation is that the amplifier and other hardware would run cleaner when the ...
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0answers
51 views

Test Equipment for generating large voltage spikes

I am trying to test a tachometer circuit which takes large voltage spikes from an inductive pick up and conditions them for TTL logic. I need input voltages in the order of 200V peak-to-peak but most ...
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2answers
59 views

Is a relay stressed by a partial activation of the trigger?

I'm using a relay like the one in the picture, controlled by an Arduino. I basically use it for turning mechanically on/off a circuit, when i have 0 as constant output from a series of values that ...
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2answers
51 views

RC Waveform output signal confusion

I've been struggling to understand how filter capacitors specifically low pass filters achieve their output signal waveform. If I take the example from https://www.electronics-tutorials.ws/rc/rc_3....
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2answers
67 views

In an audio circuit, with an LM386 chip - how does the DC electric power and the AC audio work?

I am currently putting together a simple audio amplifier using an LM386 chip. In the midst of studying how this chip works, and the proper circuit analysis behind it, I began thinking about how ...
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1answer
37 views

What is the exact value of voltage at T in square wave form?

at t=0s v=1V; T=5ms v=1,0,-1? which one? looking at graph.
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1answer
63 views

Mitigating unknown error in power analysis of ATMega328P microcontroller

Setup: Arduino Uno (ATMega328P Microcontroller) running inline assembly instructions using asm statements. Global interrupts disabled. Pin 13 (PORTB5), DDRB5 designated as output used for trigger ...
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0answers
23 views

SCPI - program signal generator to stack existing signals

I have a Keysight 33500B signal generator and I would like to remotely program arbitrary (ARB) waveforms that consist of existing signals in the device's library, ...
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2answers
890 views

Why does putting resistors between Vcc/SDA & Vcc/SCL in I2C result in a square wave?

I'm trying to understand why placing resistors between Vcc and the data/clock lines helps my waveform be square, when I'm communicating between Arduino and an EEPROM chip. If resistors are not placed ...
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3answers
101 views

Square wave to DC voltage with passive components

Good day, I have a design challenge that I have been thinking about. Is there a passive and inexpensive system that I can get a square wave (frequency not decided yet, but less than 8MHz) that will ...
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2answers
88 views

Current waveform electric motor

Does electric motor reactance at given speed is constant according to rotor position (angle)? For switched reluctance it is not. But for three phase induction motor? Considering there is no any noise....
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0answers
35 views

113kHz Analog signal generator circuit operation

The title doesn't allow for detailed questions so I will try to do that here. I have a device that needs a 113kHz square wave at around 10 volts to operate. Currently, the circuit I am using takes a ...
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3answers
85 views

At what resistance can a real inductor act like an ideal inductor?

So it's my understanding that an ideal inductor with a constant voltage applied should have a constant ramp for the current through it (a triangle wave), but an inductor that's not ideal (with ...
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1answer
39 views

Duplicate IDs in VCD files

I peered into one of the VCD files that was generated when I ran a Verilog testbench using Cadence's ncverilog suite. There, I noticed many wires (belonging to different module scopes though) that had ...
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2answers
123 views

Voltage of inductor/transformer with a square wave input

I'm kind of having trouble thinking of what the response of an inductor to a square wave input would be, as well as the response of a transformer (I found this answer for a square wave input to a ...
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1answer
34 views

How to draw the JK flip flop waveform for Q

The task is to draw a signal for the Q output. I know that the x is the one and the only one of inputs, but I have no idea what to do if I have this AND gate. How this signal will looks like in this ...
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1answer
70 views

Question about RC square wave converters

I was trying to make a square wave to triangle or sine wave converter circuit, and it seemed to work, the problem is that I think there's a problem when you want to use it for something that requires ...
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0answers
37 views

Weird waveforms for a transmitter circuit

My book about digital logics ("Digital systems" of Ronald Tocci) provides a waveform which seems illogical to me about a transmitter circuit. This is the diagram of the circuit: The inputs for the ...
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2answers
800 views

Why IR remote waveform is a saw-tooth or am I measuring it wrong

The measurement circuit is as follows: simulate this circuit – Schematic created using CircuitLab The waveform looks like this in my measurement: Is this because I'm measuring it wrong and ...
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6answers
1k views

Why is signal on XTAL1 and XTAL2 a sine wave (not square)?

I have a basic implementation with a crystal feeding XTAL1 and XTAL2 on a processor (similar to below). When I look at the signal on XTAL1 and XTAL2 they are sine waves. Shouldn't they be square ...
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0answers
28 views

ALE and PSEN example waveforms - are highs and lows “flat enough”?

Sorry if this is a silly question. All of my waveforms (square, rectangle, pulse) exhibit the kind of behavior in the image where the highs and lows are not super-flat. Clock is 18MHz and these ...
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1answer
65 views

How can I modify this working circuit to reach 1V peak to peak voltage?

It's a 100 kHz sine wave generator. But I want to reach 1V peak to peak voltage.
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2answers
67 views

How do I modify this working circuit to work with a single 0 - 5 V rail?

I want to build a sine wave generator, but I have just +5 V and 0 V. I build the schematic in LTSpice. If I try with +5 V and -5 V it works very well, but when I try with +5 V and 0 V it doesn't works ...
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1answer
162 views

Measure current through a stepper motor coil [closed]

I have a TB6600 stepper motor driver and I wanted to measure and observe the current through a single phase (as shown on pg. 23 of the data sheet) of the connected stepper motor on an oscilloscope. ...
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1answer
78 views

How to produce this type of wave?

Can we use Virtuoso Cadence to produce this type of wave(c,first picture)?it is the wave that PZT produced My schematic and waveform of connecting high pass
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3answers
100 views

How to drive a piezo disc?

Can I drive a piezo disc at any frequency I choose? I am trying to use some discs similar to this link. In particular, I was trying to drive one with a 5V square wave at low MHz range, around 1 to 10 ...
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2answers
201 views

Why am I getting a half-wave rectified output when i am using a full-wave rectifier?

I have recently gotten back into electronics and have access to a lab with a signal generator and oscilloscope. I have been trying to teach myself how to use this equipment by building small and ...
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1answer
39 views

What would be the waveform of output of this circuit?

I want to know what would be the waveform of Voutput of the schematic below simulate this circuit – Schematic created using CircuitLab The Falstad Simulation I tried to solve it using circuit ...
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1answer
52 views

Why can the loading resistor and capacitor let the unloading waveform become from negative to positive voltage?

Fig(1) is part of schematic,and it generate a sine wave .Fig(2) shows two waveform which are with load and unload,i can understand that these two waveforms will be different because of loading,but why ...
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1answer
109 views

How to calculate frequency of this Op Amp square wave oscillator?

I was trying to come up with the equation to calculate the frequency of this circuit. R1 and R2 are creating analog ground because I am using bipolar op amp for a single supply operation. Thank you ...
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3answers
73 views

Strange Waveform at high frequency from transimpedence amplifier

Using a simple transimpedence amplifier setup, I was able to measure noise from the output waveform by applying a small signal to the non-inverting terminal, while the inverting terminal receives dark ...
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2answers
1k views

Why is Zener avalanche noise saw tooth shaped?

I have the following schematic of a Zener based noise source:- simulate this circuit – Schematic created using CircuitLab When built, an oscilloscope reveals a saw tooth noise signal at the "...
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2answers
73 views

Is it easier to attenuate a sine wave or a more complex wave?

All other variables being equal, how does waveform complexity of a plane wave affect shielding effectiveness? Is it easier to attenuate a sine wave or a complex waveform?
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1answer
90 views

What electrical component serves or can serve this function?

I was thinking about what diodes can do to AC current, how they can be used to rectify alternating current by only letting it pass in one direction, so only the positive part of the wave or the ...
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1answer
85 views

Interaction of AC and DC waveforms in motorcycle frame and their effect on AC & DC components

We are undertaking a LED lighting project and have figured out the way circuit in motorcycle works, the AC return is through frame and the DC return (negative) is through the frame to negative ground ...
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2answers
93 views

How can I reconstruct exported oscilloscope data?

I want to reconstruct oscilloscope data imported into a spreadsheet directly from my Velleman PCSU200 oscilloscope. The data of primary interest are the frequency and amplitude, I'm not interested in ...
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2answers
629 views

SR latch timing diagram or waveform with delay, help!

I'm having trouble solving these two problems (my solution and general solution showed): What I did was follow the truth table and based on the combination on the graph draw the appropriate state ...
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1answer
50 views

Signal in and out of flip according to IEEE symbols

I have the following IEEE symbol for a SR flip-flop I have to work out the waveforms W and X given A and B. Here are A, B and the associated solution for W and X (as given by the book): From my ...
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1answer
127 views

Generating a cosine wave with multisim

I'm attempting to complete a project using multisim. I have to determine resistor and source values for a differential opamp. One of the specifications is to supply a -10 amplitude cosine wave when ...
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0answers
283 views

Amplitude Modulation of sine wave vs cosine wave

I'm starting to learn Amplitude Modulation. I came across how AM is modeled mathematically. What I read was, Let, \$v_c=V_csin(w_ct)\$, be the carrier voltage, \$v_m\$, be the modulating voltage. ...
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1answer
235 views

Decoding waveform from RFID 125 khz reader

I've recently bought a chinese reader for EM4100 and compatible cards: it has an USB to UART converter to get commands from the software and an STM8S10 MCU responsible for the RFID comunication. I ...
3
votes
1answer
87 views

Understanding digital filters, specifically their effects on time domain information, how to preserve the waveform of a signal being filtered?

According to Steven W. Smith, in his book: The Scientist and Engineer's Guide to Digital Signal Processing, when designing a digital filter, "Good performance in the time domain results in poor ...
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2answers
61 views

What is the purpose of the series of actions: amplification, band-pass, rectification, and low-pass?

Can someone describe for me in simple words (if possible) what happens to a signal if we: Amplify it by $\times 40,000$ Band pass filter it (750-5000 Hz) Full wave rectify it Low pass filter it (<...
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1answer
117 views

Average value of Vout

I have the following circuit: where Vin is waveform with the frequency of 1kHz and amplitude 10V. The diodes are ideal. I need to find the average value of Vout. I found that when Vin > 0 then D1 is ...
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0answers
51 views

Does ultrasonic ceramic disc used for mist maker have polarity?

I see it has red and black wire. Does it mean the wave form applied to it need to be at a dc offset ?
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0answers
122 views

Current and Voltage Waveforms in a Full Bridge Inverter

I have some troubles understanding the current and voltage waveforms of the MOSFET and the freewheeling diode in a full bridge inverter. I would be very grateful if someone could enlighten me since I ...