Digital Definition and 492 Threads

Digital electronics is a field of electronics involving the study of digital signals and the engineering of devices that use or produce them. This is in contrast to analog electronics and analog signals.
Digital electronic circuits are usually made from large assemblies of logic gates, often packaged in integrated circuits. Complex devices may have simple electronic representations of Boolean logic functions.

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  1. G

    Analogue and digital question (really )

    [SOLVED] analogue and digital question (really urgent!) Homework Statement Hi all; I've got a question: Two mobile phone signals were sent a bit at a time along the same wire but the bits didn't get separated. They produced the text message below. What message was being carried by each...
  2. Math Is Hard

    U.S. switch to digital TV broadcasting

    https://www.dtv2009.gov/AboutProgram.aspx I ordered my $40 discount coupon for a converter box, since I am one of those who make do with rabbit ears.
  3. K

    How Do Physics Principles Influence Digital Camera Technology?

    Homework Statement What physics principles are applied to the design and use of digital cameras? 2. The attempt at a solution • Charging the battery requires electrical and magnet field use from the source it is obtaining the energy from. The battery creates electric potential...
  4. A

    What is the process of digital sampling in music?

    The process known as sampling in reference to music is as follows: A device called a sampler is used to convert an analog signal representing sound waves into digital information. This digital information is called a sample, artists often use samples in their music. however, this not the only...
  5. A

    Digital Sampling Explained: Process, Function & Quotes

    Can someone define the process of digital sampling for me, perhaps a website with some info on it. I'm writing a term paper and I keep running into sampler adds, but no concrete facts. What is the function of sampler? I'm referring to a device that turns an analog recording into a digital...
  6. wolram

    Digital Camera Software Compatibility with Windows Vista

    I have a digital camera but the software does not support windows vista, i have been to the cameras website but there is not a solution listed, am i sunk or is there a way around it? Thanks.
  7. E

    Why Do We Use Flip Flops for Finite State Machines?

    I don't get why do we use Flip Flops for Finite State Machines? Can anyone explain? -Thankyou
  8. E

    Digital Logic - Timing Analysis

    What do they mean by saying that " If the clock frequency is 45MHz and we use 50MHz then the circuit will not work". I am confused :rolleyes: I don't understand the timing analysis in digital logic. Please help me out -Thanks
  9. C

    Touchscreen input to digital circuit

    I'm trying to design a digital circuit which will accept input from a touchscreen. Does anyone know if a touchscreen is manufactured which has input/output cables which are meant to be read by a digital logic circuit? (yes, it'll be a very complicated digital logic circuit). Even if I can...
  10. H

    Digital Logic Design: Simplifying 4-Var Map | F(w,x,y,z)

    [SOLVED] digital logic design i want to simplify this function using four-variable map: F(w,x,y,z) = \sum(0,1,2,4,5,7,11,15) , the map contains one "1" at the upper right corner. my question is how can i take this 1 in a group? or what can i do with it?
  11. O

    Digital Electronics Project - Sound detection

    Greetings all, I thought I'd post my idea and plan for my digital electronics project here to see if I can get any tips or meet people who may have some expertise on this subject... The basic idea is a 'lock' that is opened by the correct series of input notes. Using a PIC, what I'm...
  12. cepheid

    Can Karnaugh Maps Simplify Digital Logic Expressions Without Static Hazards?

    Homework Statement Draw the schematic circuit diagram that implements the following expression using as few basic gates as possible (AND, OR, NOT, XOR, NAND, NOR). The prime denotes the complement: f = w^\prime z^\prime + w^\prime xy + wx^\prime z + wxyz The Attempt at a Solution From the...
  13. P

    Quantum uncertainty and digital data

    Is computer data ( stored or transmitted) immune to the effects of QU ? If not then with a program handling billions of bytes of electronic data is corruption due to QU ever an issue
  14. F

    Engineering Digital Circuit Help: Solve for Truth Table & Boolean Function

    Homework Statement 1. Derive the truth table for the circuit. 2. Derive the Boolean function directly from the circuit. I can't the function to agree with the truth table. I don't know what I'm doing wrong. I somewhat positive my truth table is right, but I think my function statement is...
  15. J

    Simple Digital Wireless transceiver IC?

    Hello All, I'm wondering if there is a very simple (and cheap) method to transmit data from the board with my microcontroller on it to another board? I was looking around ant patallax has a nice transmitter/receiver pair for about $30 that you can buy here...
  16. T

    Help with manipulating a digital signal

    Hi everyone, software engineer here that needs help with a basic EE project for an automotive application. I have a digital hall sensor that goes high (+2v) once per engine revolution. This high signal is used to time the ignition spark, and its frequency is used to determine the engine RPM...
  17. D

    Electr. Engineering - Digital Sig. Processing

    Determine if the CT systems are 1) casual or uncasual 2) memory or memoryless. Definitions: Casual: If for any time t1, the output response y(t1) at time t1 resulting from input x(t) does not depend on the values of the input x(t) for t > t1. Memory: If the output at time t1 depends in...
  18. J

    Can Dedicated Digital Volt Meter ICs Enhance Microcontroller-Based Projects?

    Hello All, I am working on a microcontroller-based control circuit that can generate different frequencies for experiments I am working on, but I also want to add a feature that allows the microcontroller to take voltage measurements from my test setups. The 68HC12 controller board I am using...
  19. J

    How Can a Digital Delay Line Enhance Signal Alignment in Circuit Design?

    Hello All, I'm still working on my experimental control board and up to this point have been determining the best way to do the phase shifting of the input signal onto three output channels. After doing some experiments, I realized that a simple 120 degree phase shift between the three...
  20. L

    MATLAB How to filter an EEG digital signal with Matlab?

    I have a digital signal from EEG recording. I need to filter 50 Hz frequencies and 0.5 to 120 Hz, so I've tried this: 1. I designed a notch filter with Matlab. 2. I used fft to transform the signal to frecuency domain. 3. I applied the notch filter. 4. I used ifft to get back to time domain...
  21. R

    Suggestions to begin study communication and digital signal processing

    Hi,I am a graduate student, want to transfer from physics to electrical engineering to study communication and digital signal processing , till now I don't know so much about that. Next semester, I will be a Teaching Assistant in Electrical engineering for the first year.each semester I must...
  22. P

    Can Op Amps be Used for Digital Circuits?

    I had electronics last semester, and we went over some digital briefly at the end. I think we learned a bit about digital circuits using diodes and something about transitor-transitor logic? Anyway, at the time I was wondering if there was a way to use Op Amps to create digital circuits.
  23. W

    Digital Modulation onto Electromagnetic waves

    Hi Guys, I was hoping someone could explain why commercial satellite uplinks (like those used in TV broadcast) are able to achieve such high bandwidth rates vs. radio uplinks like HAM OSCAR uplinks. I don’t completely understand how digital modulation is done onto radio wave, but at 1st...
  24. DaveC426913

    Advice on enhancing digital image

    I've got a sequence of pictures from my camera of some very distant buildings (~20mi) that I'd like to digitally enhance. I took about 20 shots in rapid succession in the hopes that I can combine them to produce a better image. My first attempt will simply be to overlay them in PhotoShop and...
  25. S

    Digital Signal Transmission on Buses: Why Analog Signals Aren't Preferred

    Are busses mostly used to carry digital signals? If yes, then why so? Why aren't buses a popular means of carrying an analog signals?
  26. E

    Software Engineer or Digital Systems?

    Which has a higher demand in computer engineering today? And why? i am stuck in choosing what it would be... i just can't get what these two mean... so it would be better if u please provide explanation for these two courses? And sorry if this is already been posted before... please give a link
  27. P

    Why flash of light in a digital camera?

    When taking photos with a digital camera there is usually a burst of light before the photon is taken. Why is this? Is it because there is usually not enough light reflecting off the object being photographed. It is this reflected light that is what is being recorded on the film inside.
  28. A

    Find Digital Circuit for ATM Device in .ewb Format

    Does anybody know where i can find the Digital Circuit for an ATM Device in .ewb format??
  29. K

    Creating a 4-Cycle Counter in Digital Logic

    Im not sure if this is the right place to post this but here's my question. I have to create a counter that outputs a 1 every 4th clock cycle. I can't make a truth table because it doesn't really make sense. I am a newb to digital logic and suck at it. Any one have any help. Thanks Jason
  30. S

    Mastering Digital Signal Processing: Faster Learning & Implementations

    hello everyone, what stuff can i tackle on my own to learn dsp? complex variables and Fourier transforms to begin with - but what else? how do other aspects of EE play into dsp? how do i get functionality fastest!?
  31. N

    Need serious advice on digital project problem

    first off I'm not looking for ANYONE to do the work for me, I have already spent 3-4 hours a day for the last 6 days on this and I'm stuck. It should be easy but something screwy is going on... Here are the project specifications: Using a SN74LS193 TTL IC, (an up/down counter with a dual...
  32. J

    Smoothing/Filtering Data from Analog to Digital Converter

    Hi, I am trying to filter noise out of data gathered from an analog to digital converter. I've looked at averaging techniques but I fear that they cause too much data loss. Can anybody recommend other smoothing/filtering techniques that might result in less data loss and can be done...
  33. M

    Frequency output = sum of 2 frequency inputs (Digital)

    Hi, I have a electronics problem (surprise surprise) This is my problem Current system consists of a sensor which outputs a variable frequency (square wave say between 0Hz and 5000Hz, 0-5V signal) This frequency is read by a computer, which does stuff based on what the current frequency is...
  34. S

    Help Designing Digital Elevator Simulation

    I need some help designing a Digital elevator simulation using multi media logics. I need some help and guidelines as to how I should get the thruth diagrams, kmaps and the circuit going. I am required to design a digital circuit which has applications in elevator style controls. My circuit...
  35. O

    Digital controller: how to programm it?

    Hi! I have to use a Honeywell-Mellen controller UDC 3200. To heat up to 1000°C with 5°/C min. I was programming as follwing: SRAMP Time:250 EU/HR: 8500 GAIN: 60.0 but is is still fast heating ? Have you any idea how to do it? Thank you in advance!
  36. J

    Make an AND Gate with 7486IC: A Digital Logic Question Answered by Jason O

    Hi Guys, Quick question. If all I have is a 7486IC and I want to use it to make an AND gate, how woud I hook it up? Thanks, Jason O
  37. J

    Differance Between Analogue and Digital TV

    Okie doke, I need someone here (or a collection of people working in some sort of synchronized fashion) to write for me a 1500 word assignment on the difference physics wise between analogue and digital tv broadcasting. Have fun doing it. :D
  38. V

    Have digital video product idea, need EE help

    Hello, I am not an student, engineer or businessman, just a digital video hobbyist/wannabe filmmaker with an idea for a digital video product, that in my uneducated opinion, would be easy to engineer. I am looking for a person (student or otherwise) with decent knowledge of the U.S. version...
  39. M

    Studying Digital Communications textbook?

    Hey guys, I'm taking a Digital Communications class and we are using the book "Digital Communications" by Bernard Sklar. I have heard from a few people that this book is not as mathematically rigorous as some of the other books in the field and therefore does not provide a deep understanding of...
  40. M

    Understanding Modern Digital System Design for Incoming Freshmen

    I will be taking Modern Digital System Design during the Fall 2006 semester at Texas Tech University. As I am an incoming freshman, I have nobody to consult about this class. If someone could please tell me what this class is about, what I should be expecting, and/or what I can do to prepare for...
  41. Ivan Seeking

    How can digital camera neutralizing technology prevent unwanted photography?

    http://www.gatech.edu/news-room/release.php?id=1017 Also, regarding the recent conversations about text messaging and cheating on tests, there are cell phone neutralizers as well. They are or will soon be in theaters, restaurants, etc.
  42. electronic engineer

    Drawing Digital Word: Guide to OOK, PSK, ASK & FSK

    How to draw signal waveform for this digital word {11001011} ,using these codes: -OOK(ON-OFF Keying) -PSK(phase shift keying) -ASK (amplitude shift keying) -FSK(frequency shift keying) I need the guide to go through this problem or at least a useful link.
  43. fargoth

    Digital holography - why not 3d?

    after applying Fourier transform on the interference picture i get from the object ray and the reference ray (which i captured with a high definition CCD), i can see the object again... but it doesn't look like a hologram to me... its pretty 2d dimensional looking... my guess is that my...
  44. A

    Mathematica How Can Mathematica Calculate the Digital Sum of a Number in Base 10?

    Which command in Mathematica will give me the sum of the digits of a number in base 10? Thanks.
  45. K

    Why is Digital Butterworth lowpass?

    This is a homework question. However, here is what I have thought about. Here is my formula for the output filtered signal: Yk = a*Uk + (1-a)Yk-1 Where "a" is coeffiecient that "weights" the current value of the unfiltered signal. And Yk-1 is the previous output signal. For some reason...
  46. C

    Exploring Elliptic Curves in Digital Signatures

    Good morning to all. By laboral reasons I am reading about digital signatures and "public key" cryptography. The most popular of the cryptographic methods related to digital signatures (RSA) is only an application of the "little Fermat theorem". This theorem belongs to "baby" number theory...
  47. Nebula

    Exploring Digital Physics: What is it and Where to Learn?

    I wasn't sure where to drop this topic, so I figured General would be the best place. Anyway, here goes. I'm majoring in Physics/Mathematics and I need to begin work on my thesis soon. Only problem is I don’t have a topic. Whilst trying to find some problems and areas that link automata and...
  48. dduardo

    Interesting Digital Sharing Dilemma

    This project brings up an interesting legal dilemma with basic public key encryption and sharing digital copyrighted material: http://monolith.sourceforge.net/ ---------- Here is the basic gist: Let's say I have a copyrighted file that is represented by the following bit sequence...
  49. K

    How Should Vref Be Set in an ICL7107 Autoranging Voltmeter?

    I am building an autoranging digital voltmeter as the subject line suggests and am having a problem with the ICL7107 chip that I am using. Looking at figure 15 on: http://www.intersil.com/data/fn/fn3082.pdf specifically RefHI and RefLO, with a 2V max input difference between the pos and neg...
  50. siddharth

    Digital Technology 101: Intro, Uniform Quantisation, Sampling, SNR, etc.

    This semester, I have a course which is a basic introduction to digital technology. I want to start a general discussion/tutorial on this subject. More specifically, some topics which I would like to cover in this discussion are, Uniform Quantisation Sampling Signal-to-noise ratio (SNR) Analog...
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