What is Digital: Definition and 491 Discussions

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. V

    Need help W/ Digital Camera Design Project

    Hello, I am currently working on a Design Project for my Senior project, and the aim of this project is the development and construction of an interface between a CMOS camera and a computer. This interface allows a user to get images from the camera, to change some of the properties of the...
  2. Z

    How can I convert digital voice recorder output to a usable audio file?

    Hi all, I have a digital voice recorder from Memorex, the only problem being it doesn't hook up to the computer. It does have a earphone jack, though...through which it must output an electrical signal, which reaches the earphone and is converted to sound waves. But, is it possible to have...
  3. S

    Digital circuit: multiplying 2 binary numbers

    "Design a digital circuit that multiplies two binary numbers by the repeated addition method (to mult. 5x4, the digi system evaluates the product by adding the multiplicand fours times: 5+5+5+5=20). Let the multiplicand be in register BR, the multiplier in reg AR, the product in reg PR. An adder...
  4. V

    How a digital to analog converter works

    can someone please explain how a digital to analog converter works if say your equipment includes a computer with a software like Labview, a Lab-NB board, a terminal block (USB) and an oscilloscope. what is each component doing and what is being transferred between them? thanks.
  5. N

    Digital video camera lens information

    I am going be so pleased i f anyone can suggest a website where i can find information regarding the following topic: Digital video camera lens.do anyone know a website where i can download a short video regarding fiber optics.
  6. B

    Implementing digital PID control

    I want to control the rpm of a brushless motor with ESC(Electronic speed controller) using PID control. Suppose my motor is rotating at 2000 rpm detecting using hall sensor setup.Now I want it to run at 5000 rpm.The speed will be controlled by PWM signals generated by PWM module( 16-bit i.e...
  7. D

    Potential Risks of Using Output Pins as Input on Chips

    what would happen if u input a signal into an output pin of a chip?
  8. D

    Understanding the GPIB: A Digital Logic Perspective

    The digital logic of the GPIB
  9. J

    Fix My Fuji FinePix S7000 Camera Issues

    My Fuji FinePix S7000 is sometimes showing lines, or purple streaks on the LCD when I take a picture. These lines and streaks are also on the downloaded photo. Is this something that can be fixed, or do I need a new camera? :cry:
  10. E

    Digital System Design Course - Lab Info & Reviews

    Hi everyone, i am taking digital system design this coming semester, but they also call it digital logic. It has a lab, what kind of stuff would the lab be about? I scanned the textbook and it looks awfully mathematical rather than engineering. Anybody have taken this course? I did well in...
  11. H

    Do Digital Signals Really Transmit More Information Than Analog Signals?

    I found the following on the Edexcel Website: GCSE Specimen Paper Paper 4H Physics A [1540] URL http://www.edexcel.org.uk/VirtualContent/18085.pdf Question 1(b)(ii) “Digital signals have an advantage over analogue signals since more information can be sent over the cable. Explain...
  12. N

    What is the best digital camera for normal use under $450?

    hello everyone ... i just need a guidance to the best digital camera for normal uses ( not profssional) .. is it sony ? please specify the model also my budget is around 450 any help will gr8ly b appreciated cheers :smile:
  13. D

    Stargazing Cost-effective digital camera and telescope

    Could anyone suggest good equipment for astrophotography? What is the most cost-effective digital camera and (digital camera compatible) telescope?
  14. R

    Introduction to Digital course

    Hi everyone, I am going to take a digital electronics course next sesmester. But, I know nothing about Digital Electronics. What books do you recommand for introduction to Digital Electronics? And, any website for this course? Thanks.
  15. G

    Digital Electronics: Binary-Coded-Decimal to Seven-Segment Decoder

    This is one of the problems I have for homework: Consider a BCD-to-seven-segment decoder and suppose that the BCD data are represented by the logic variables B8, B4, B2, and B1. For example, the decimal number 7 is represented in BCD by the word 0111 in which the leftmost bit is B8=0, the...
  16. Reshma

    Analog vs Digital: Explaining the Difference

    What is the basic difference between analog and digital devices? What is the technical explanation for it?
  17. arivero

    Uncovering the Fight for Digital Freedom: ArchiveFreedom.org

    Just noticed this site: http://www.archivefreedom.org/casehistories.htm hmm
  18. russ_watters

    Are There Better Battery Options for My Nikon Coolpix 3100 Camera?

    There's probably nothing anyone can do to help me, so this is mostly a *****, but I have a Nikon Coolpix 3100, which is a great camera except for the battery life. Now, I know most digital cameras have crappy battery life, but mine is rediculous. What makes me think something can be done about...
  19. J

    Will a Western Digital 10000RPM Hard Disk Work on My PC?

    hi, a friend is heading over to malaysia in the next few days and asked me if i wanted a 10000rpm ( 8mb cache, SATA ) 74 GB WESTERN DIGITAL 10000RPM hard disk. i would say yes but i am not sure if it will work on my pc my motherboard is an ASUS P4P800SE with Intel 865PE Chipset can someone...
  20. D

    Digital Electronics Boolean Reduction

    Digital Electronics Boolean Reduction! Help Please Ok i need to figure out how to reduce this I've been working on it for 2 days straight and can't figure it out...please help...its due tommorow :uhh: :cry: (ab)(\overline c + \overline d)+(a+b)(\overline c \overline d)
  21. T

    Essay on Digital and Analogue technology -_-

    Discuss the differences between digital and non-digital communication. the conventions of both must be demonstrated using examples. Terminology must be employed correctly throughout... -- I have gathered research about the difference between analogue and digital, however I cannot think of...
  22. R

    Digital Pedometer for energy expended in exercise

    I use a digital pedometer which has pace counting gigure. Four items are displayed: Pace number , pace number by mile, kilometer as well as consumed calories. I need help in finding out : 1. What is the relationship between distance in kilometers and calories burnt? 2.While the pedometer...
  23. enigma

    Finest Grade of Digital Crack ever created by man

    Just wondering if anyone else is participating in the http://www.worldofwarcraft.com/ http://www.worldofwarcraft.com/misc/openbeta-faq.html? I have sunk more hours than I care to admit into it this weekend. The game is amazing. Warning: If you are a video game addict, do not download it, or...
  24. C

    Can digital and analogue signals be used interchangeably in modern networks?

    Digital and Analogue Signals... When learning about digital and analogue signals, I have been told that a fibre optic cable can be used for digital signals, whilst a copper wire is usual used in the case of anaolgue elctrical signals. My question is could they be used for the other things? Ie -...
  25. N

    Digital Radio Interface

    Hi, I'm trying to design a low-cost digital radio interface to communicate with a robot. I'm not interested in exchanging a lot of data, or doing it at high speeds. This design will work well if I can get even 300 baud out of it since I never exchange more than about 1K bytes during a...
  26. I

    Decoding Analog Signals with PCM/QAM - Help Needed

    from analog to digital(PCM/QAM) I want to convert analog to digital. I am recording analog signals in my firm and i want to make a programm witch helps me to decode fax informations. if you know how to decode this analog signals witch is modulated with PCM/QAM, please help me.
  27. Crumbles

    Digital Picture Orbs: Explaining Unusual White Objects

    Does anybody have a logical explanation to what those little white things on digital pictures are? I figured they can't be dust on the camera lens because they come out in a different place of the photo even if 2 photos are taken one after each other. Anybody, any ideas?
  28. A

    XPHow to Transfer Pictures from Olympus C-50 Zoom Camera to Computer

    Hey guys; I'm having an add problem with my digital camera. It's an Olympus C-50 Zoom. I plug it into my USB port, and it says "New Hardware Found", then it shows that it recognizes it as what it is, the digital camera, then it says it found a "USB Mass Storage Device". It shows no errors...
  29. C

    Why do different instruments measure the potential of a wire differently?

    From physics sheet - "all signals (digital a reduction in signal power) as they travel through a system and need amplification at certain intervals." Why is this the case?
  30. D

    Digital logic gate power suppy

    merged with the other thread by enigma
  31. D

    Tips for intro to digital systems test?

    My intro to digital system teacher is hard. He gives question that ask u design circuit such as make a counter that count 3 5 9 0 3 using mod-6 counter + encoder + decoder. Do question like this have a systematic way of solving or is only solvable if u have mad experience? He seems to give...
  32. Integral

    Calculators The original handheld (digital) calculator.

    The original handheld calculator. Curta This was designed in Buchenwald, the German concentration camp, the first prototypes built from the original hand drawings worked. It was manufactured from 1948 till ~1970 when cheap electronic calculators came on the market. I would love to hold...
  33. JasonJo

    Digital Elevator: Designing a 2 Floor System

    hey guys I am stumped on this project: make a 2 floor elevator. i am going to use an H-bridge to control which way the motor spins (ie. clockwise will make the elevator go up, counter - down). anyway, here are the initial conditions to be met: elevator must stop at both floors elevator will...
  34. dlgoff

    Optical analog to digital converter

    I designed an optical A/D (on paper only) several years ago. I have no means to make one since small scale integration is required. Any ideas how to get someone interested? If it works correctly, there would be zero conversion time and only settling time for the detectors outputs.
  35. H

    Is the Universe Analog or Digital?

    I originally posted this in the Relativity forum but I thought it was cogent to this topic so I'm repeating it. Sorry for the redundancy: Is the Universe Analog or Digital? First, I'm new to this forum, so I'm sorry if I'm being redundant or naive. Anyway, a while ago, I'd seen the...
  36. H

    Is the Universe Analog or Digital?

    First, I'm new to this forum, so I'm sorry if I'm being redundant or naive. Anyway, a while ago, I'd seen the question posed, "Is the universe digital or analog in nature?" Seemed like such a complex question at first, but then I came up with the following answer, and it's not what some...
  37. Moni

    Digital Camera Shopping - Finding the Best Option Under $300

    Digital Camera ! I need to buy a digital camera. And I've budget 200-300 USD. Can you suggest any?
  38. jimmy p

    Analogue vs. Digital and MPEG4

    Ok, i learned yesterday that Digital was old fashioned, which does in a way make sense because the waves are very basic (compared to analogue. Also i learned that Digital TV cut out around 95% of the information that would appear on an analogue wave. Instead of focusing on expanding digital...
  39. O

    Optimize my digital recording capabilities

    I'm trying to optimize my digital recording capabilities, and to do so I need to get my hands on a 25 pin scsi card for my pc. I have had no luck trying to find one of these things. Does anyone know of a place I might find one? Also, can a mac scsi card be easily manipulated to work in a pc? Thanks
  40. N

    Analog to Digital PC Signal Interface?

    First, let me introduce the situation: I'm an undergraduate physics major taking a course in Experimental Physics. In the lab I am investigating the motion of natural underdampened oscillators. The oscillators under investigation are nothing more than various pieces of metal suspended...
  41. PeteGt

    Do we see in digital or analog?

    simple question... do we see in digital or analog?
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