Digital Definition and 474 Threads

I have seen most people say electronic dictionary, diary etc. I often confuses the terms. Since long time I have referred to my handheld Franklin dictionary as digital dictionary. Am I wrong?

Hi, I am wondering if anyone can advice on which kind of digital thermometer would be most suitable for the following conditions: 1. It should quickly be able to detect a sudden increase in temperature. The actual temperature is not important, only the detection of a sudden change in...

Dear Friends: I am a PhD. in Chemistry, born and studied in Germany, whereas I am working in Brazil in industry. My High Mathematics knowledge might be inferior to most of you. Therefore I beg your pardon, if I explain my ideas somehow naively. The question is, if STRINGS may vibrate at...

HiHo! W. Stallings's "Wireless Communications & Networks, 2nd edition" explains the relationships between bandwidth and Fourier transformation by depicting a square wave. The square wave is approximated with a Fourier series having several sine terms. The bandwidth is then defined by the...

Hi, I wonder if someone could shed light on my question. It's kind of related to Fourier Transform and attenuations on signals. As everyone knows, in the early days, the communication on the local loop was on dial up which was basically analog communication.The digital data in computer...

How exactly do digital multimeters measure things like potential difference, electric current, and electrical resistance?

Hello I have attached the sheet that describes the problem. This is supposed to be simulated in MATLAB first with no disturbance and then with disturbance. My problem is that I am not sure how to program a lot of this stuff in MATLAB so that is one thing i need help with and then just putting...

Hi, Please can anyone give me some ideas of a "relatively" easy circuits involving digital and bipolar technology (meaning both technologies combined) to make a vlsi layout? It is for a project and I really did not find something interesting. Thank you

I'm trying to figure out how to build a breadboard instrument using either push buttons or logic switches as they keys that will play each note. The issue that i am having is that I don't think finding all of the perfect resistor and capacitor combinations for each note is a good idea. So, i...

The UK parliament*recently passed a piece of legislation called the*Digital Economy Bill (now known as the Digital Economy Act, or DEA). *The DEA is a collection of measures designed to target copyright and other IP violations on the Internet and in other forms of electronic communication...

Homework Statement Assume you have a symmetrical clock at 100MHz. Design a logic circuit with four outputs of clocks at 100MHz, 50MHz, 25MHz, and 12.5MHz. The logic circuit should have 2 inputs to select output clock rate. Homework Equations N/A The Attempt at a Solution For...

Homework Statement No problem statement - just the following questions. Homework Equations 1.Display on a CRT is most similar to what reconstruction filter? 2.How many samples are required to represent a given signal without loss of information? 3.What signals can be reconstructed...

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How do digital volt meters work? If I connect a Digital voltmeter to a battery, how does it measure the voltage. And I'm assuming it measures terminal voltage, not emf? This question's probably simple but it's been bugging me for awhile. All I can think of is that the DVM produces (or...

Hello, I know that you send digital signals using ASK, FSK, PSK modulation. I was wondering though if it was possible to send that same digital signal using FM or AM modulation? If not, I was wondering if anybody knew of any popular ASK or FSK modulation IC's? Thanks!

I need to design a digital circuit using TTL chips (adders, registers, etc.) to perform integration on binary values. The binary values are converted from analog signals such as a sine wave, constant, square pulse, and saw tooth. I can achieve the process for constants and positive signals...

I'm looking for an accurate and reasonably priced digital thermometer. Our lab has lots of cheap models that provide precision of 0.1 C but are only accurate to +/- 1 C. I can lump them together in a room and get a range of about 3 C. Some sellers don't even provide the accuracy information on...

I am watching this now and it looks pretty interesting. One thing that caught my attention was a segment about a Japanese school that teaches internet etiquette to young children. http://www.pbs.org/wgbh/pages/frontline/digitalnation/etc/synopsis.html Watch online...

Im using CMos digital integrated circuits by Kang-Leblebici. On p85-86 a description of how a MOS layer works is given which I can't fully understand. First, the MOS layer is likened to a capacitor. Then they discuss how the work functions and fermi levels of the metal, oxide layer and the...

Hey guys, I understand remote control cars and such use their little antennas and shoot radio waves to the car and control it... My question is can I make some kind of device such that I can remove the antenna on the car and instead hook up to the reciever a digital input processor which will...

Hey friends, I am trying to make a digital capacitance meter by using a HSC08 microcontroller chip (MC9S08QG8). Unfortunately this is one of those courses where one doesn't know anything because of lack of pre-requisites. Anyhow (enough complaining) what I have been trying to do is the...

hi there... I wanted to ask about a way to cascade or let's say connect two sets of 4-bit flipflop JK counters together.. I want to create a circuit that is an up-down counter from 0 to 99..but as it is known, its difficult to use 8 inputs ofcourse.. so the best way is to have two sets of 4 jk...

How probable is a large-scale war in the next 20 years? Are there any significant growing tensions between powerful countries? Would a violent war be constructive to anyone? I remember this quote: "I know not with what weapons World War III will be fought, but World War IV will be fought...

Homework Statement (a) How many states does this system have? (b) How many rows will there be in a state transition table? (c) Provide the state transition table. (d) Draw a state diagram of the system. (e) Describe what the circuit does in words. Homework Equations The Attempt at a...

right... i need to make a programmable digital delay circuit that can delay a pulse by a few nanoseconds. sorry if any of the following info is vague, I am only an apprentice and i have taken this on as a college project, but the poduct will be used at work in a calibration lab, but i am not too...

I've been working on this problem for around three hours, and I'm getting nowhere... I think it may be that I don't have even the most basic grasp of the material to even get a decent start on the problem, but hopefully someone here will be able to help me... Homework Statement Calculate...

Hi everyone, On this page, only questions 4 and 5 I need help for. For question 4, I really have no idea, and there's no real "working" that I can show to really say that I've given it a crack. For question 5 on that page, I thought along these lines: In series circuits, voltage...

Hello, I do not know if it's really upper physics but I have some exercices to do and I find them a bit difficult for a beginning. This is a circuit: http://up.sur-la-toile.com/iu7M I'm asked to simplify it like shown on the drawing so that afterwards I get this circuit...

An analog voice signal that vary over the range 0-50mA is digitised by sampling it at 8 kHz. the first four sample values are 10,21,36 and 16mA. write the corresponding digital signal (a string of 1 and 0 bits) by using a 4 bit representation for each sample

In the lab for my physics course we're using a Vernier "A/D system" to collect/transmit data from the experiment sensor to the computer for analysis. It's my first time using one, and we weren't told anything about it. In this sense does A/D mean "analog to digital" converter? Would a digital...

what is level triggering in digital ccts. I think borth level triggering and edge triggering are same. Because in a pulse streem, edge have a level. please help me.

Hey I am interested in building a device that can give the local magnetic field in 3D. I'd like for the display to be digital not a mechanical gauge. I would not want to use any sensors or microcontrollers for that matter, but make it with gates and everything. If you do know how to make it...

A few days ago, I was reading an article on wikipedia about how musical synthesizers work and I read that initially analog technology was used and later digital technology began to be used. What I uderstood from analog technology was that only one part of the sound was altered, which...

Career in DSP! I am doing b.e electrical and electronics from bits-pilani , india. I have just completed my second year. I had a course on signal and systems(fourier, laplace, sampling etc.) in my fourth semester.It has aroused my interest in dsp field. Can anyone here guide me on how to...

Two recent posts/threads asking are spacetime and frequency continuous got me wondering: Do we live in a continuous or a discrete universe? Or a mix of both? Your thoughts appreciated. (Do we have experimental evidence anything is continuous...I can't think of anything..also, is this...

I have a question which is to design a filter of the form: y(n) = a(0)x(n) + a(1)x(n-1) + a(2)x(n-2) to remove a narrowband disturbance with frequency f0 = 70Hz. The sampling frequency, fs is 280Hz. I've made an attempt at answering it, but don't think my result is correct: w0 = (2*pi)*...

I want to transmit digital signals over an existing electrical network. Can someone give me an idea of how to go about it?

After 5 loyal years, my Canon Digital IXUS 400 has given in... i can take pictures, but there are red stripes all over them. Maybe it is something fixable, but I've been meaning to replace the thing anyway. So, i put it in a plastic sealed bag in the freezer, which the thermometer indicates...

Why should the input in any logic be present before the clock? Is the setup time related to clock rise time?

Need help! Digital signals. Energy and power Homework Statement ∞ ∑ (3)^2n n=0 FInd the energy of the signal Find the power of the signal The Attempt at a Solution Energy: (3)2n = 32+34+36+...=9+81+...= ∞ N Power: lim (1/(2N+1)) * ∑...

Homework Statement Signal x(n)= (1/sqrt(n)) * u(n) 1.Find the energy of the signal. 2.Is the energy finite or infinite? Homework Equations sum|x(n)|^2 = energy The Attempt at a Solution

We are using a DAQ (data acquisition) board for our project, that has only 2 analog outputs, but we need 4. It also has some digital outputs... Is there a way to convert the digital outputs into analog, and if so, what is it? Thanks

Hi People! I have a few questions about verilog and other HDL's which I would like to ask. >Where in the Industry are Harware descriptive Languages being used ? >What kind of tasks are being completed using verilog? >What kind of jobs do engineers specializing in Verilog and Digital...

I just bought Spore, only to find out that it's on DVD and I only have a CD-RW. I'm sure it's possible to download it using the Serial # from the disc, but I can't find where on their site, I've looked all over. Tried asking on the forum but the forum won't let me post (yet). Anyone play?

Homework Statement convert the hexadecimal number of AB6.4F to bas of 16 to its binary,octal,and decimal equivalent numbers.. Homework Equations The Attempt at a Solution i don't know what to refer,as what i know was 6.4 is an even number which could link up binary,octal but i...

Hello PF. I'm building a circuit that uses triacs to switch power on and off for a series of devices. However my teacher warned me that Triacs basically skip the zero part of the waveform, and that can affect digital devices, such as my computer. I'm looking for a more in-depth explaniation...

I have an external Western Digital 320gb hard drive that has never given me problems. However the only thing i can think of that has caused sudden problems for this external SATA drive is the bios flash that i recently updated. The drive is recognized in mycomputer, however it doesn't say how...

I want to build a digital timer that will switch my geyser on and off at a preset time in order to save power. I don’t know much about PICs so I would rather try using only logic ICs. It has to have at least 3 preset ‘on-times’ and 3 ‘off-times’. Can anyone help me to get started?

Hey guys, I was wondering if you guys could provide me with a name of a decent, but not too pricey, digital pen. I am not sure if this is the exact name I am loking for, so what I want is a pen that I can write on a given tablet/surface with and for it to show up on my PC. For example, I could...

I have recently started my second year at Uni and one of the areas I am studying is Digital Logic Fundamentals. However due to a mixup with my timetable I missed the first few weeks of the course. I am trying to catch up but have become stuck on part of the course that wasn't explained well in...