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  1. M

    Fourier Transform using Transform Pair and Properties

    Homework Statement Finding the Fourier Transform using Transform Pair and Properties x(t) = 2[u(t+1)- t^{3}e^{6t}u(t)] Homework Equations The Attempt at a Solution For the first problem, I got u(t) \leftrightarrow ∏δ(ω)+\frac{1}{jω} F(at-t_{0}) \leftrightarrow...
  2. M

    Antenna gain and tv Resistance requirements

    Homework Statement A satellite link has a transmitted power output of 0.5W. This power is increased in the direction of transmission by the transmitter antenna, which has a 20dB gain. The RF signal is attenuated by a path loss of 200 dB. The total noise level at the receiver input is estimated...
  3. M

    Statistical Analysis for our project

    Is testing the accuracy of the time to the nearest minute necessary? I find it unnecessary (I'm considering its removal from the testing) since we'll be using DS1307 which ticks approximately one second (compared to the analog one), and it is also, I believe, the one that is being used on almost...
  4. M

    Statistical Analysis for our project

    I actually have no idea on how would we conduct our statistical analysis for our design project. We will be creating a digital alarm clock with an improvised sensor and we will also be conducting series of tests for it. Now our teacher is looking for the statistical analysis. Our testings are...
  5. M

    Open Circuit Problem with Logic Gates

    I would like to bring this up again. I've tried placing a 47K resistor in series with the input gates and let the input floating. Unfortunately, it does not give a low logic input. I really need to set the input to 0 because my circuit will always have a floating input. The insulator between...
  6. M

    Open Circuit Problem with Logic Gates

    Yes, I just left the input floating. I did research about this pull-down resistor. And based on this, its just a normal resistor with values raging from 10K-47K, am I right? I also created a schematic of how I imagine the circuit would be. I have no simulators installed in this computer so I...
  7. M

    Open Circuit Problem with Logic Gates

    I wonder how can I make the logic gate read 0V when it is open? For instance, the AND logic gate. If one of its input pin has 5V supply, and the other don't have, the output signal given to me is 5V. How can I make it 0V? Well, theoretically, it should be 0V, but in reality, it appears that...
  8. M

    Different LED displays (Assembly)

    I guess we're not having the same thought, or I am completely lost to what you are saying. I am sorry. >.< Well, yes, normally a PC does not have a LED display. The LED display I am referring is the string values I have declared in the .data, where 1 is an indicator that the LED is on and 0...
  9. M

    Different LED displays (Assembly)

    I tried calling the displaymenu function (from my new code) inside the BLINKING loop but it stops displaying the menu, unless I choose another display. Has it something to do with the int 01h function? .model small .stack 64 .data options1 db "[A] Blinking",10,13 db "[B] Alternating",10,13 db...
  10. M

    Different LED displays (Assembly)

    OK, OK, sorry I misinterpreted what you've said. The only display is a black screen with my desired input and nothing at all. (Or that's not what you're pointing out?) Anyway, I was able to resolve the problem already (The relative jump problem). Next thing to do is to display the message...
  11. M

    Different LED displays (Assembly)

    Our professor said that its fine if the program can be executed only once, as long as all the routines are working. By the way, the problem remains the same.
  12. M

    Different LED displays (Assembly)

    Homework Statement Create a Menu to run a program for LED sequences using procedure calls or macros as follows: [1] Blinking LED [2] Two at a time [3] Alternate [4] Rotate Right [5] Rotate Left . The program will display „1‟ for LED “ON” and „0‟ for LED “OFF”. Use delay, message output and...
  13. M

    Turbo Assembler Problem

    I am trying to do one character input at a time. So if I succeeded with one character, the next characters will be easier. I do understand what I am trying to do, but, to be honest, I really do not have anything except for this code we did last Monday night. I really do not understand...
  14. M

    Turbo Assembler Problem

    Sorry for the late reply. I wasn't able to go online a while ago because I need to go to school as soon as possible or else I will be late. And sorry, I forgot to put it in the code blocks since I'm feel so tired when I posted that. Anyway, I tried to understand what you are saying...
  15. M

    Turbo Assembler Problem

    Homework Statement We were required to use our surnames as a password to our assembly program. If the user inputs incorrect character or string, an "incorrect password" message will appear. Otherwise, it will display "correct password." The problem is I do not know how to ask several inputs. I...
  16. M

    Assembly Language homework help

    I thought it can only hold one value. Or this two instructions are the same as xchg dl,cl? And other than those you have used, what are the other registers that I can use? Is it like variable in high-level programming languages as long as I use only two letters?
  17. M

    Assembly Language homework help

    WOW. Thank you very much for your help. I was able to do it. The code seems shorter than what I've been doing before. Though, I have some questions regarding the code you've given. 1. xchg cl,dl means exchange the values of cl and dl, right? Why are there two xchg instructions? Exchanging them...
  18. M

    Assembly Language homework help

    Sorry if I cannot fully understand what you are saying. Anyway, I made another progress. Now it displays "A zByzCyzDyzEyzFyzGyzHyzIyzJyzKyzLyzMyzNyzOyzPyzQyzRyzSyzTyzUyzVyzWyzXyzYyzZyz". I just don't know why a space exist after A. 1387:0100 mov ah,02 1387:0102 mov dl,41 1387:0104 int 21...
  19. M

    Assembly Language homework help

    Intel. As of now, I was able to display only AzB (no space yet). I'll try it again later.
  20. M

    Assembly Language homework help

    Homework Statement I'm having hard time appreciating this topic since they're not discussed well and, as of now, I still don't have resources or sample programs. We're required to display Az By Cx . . . Yb Za including spaces using DOS debug. Homework Equations The Attempt at a Solution...
  21. M

    Find the Summation Notation and the Radius of Convergence

    I know that, no need to elaborate. I'm just wondering how can I come up with that equation if you only have the values "5, x, 10, x, ...." as a given. Uhm, I don't get it. Why is this not a power series?
  22. M

    Find the Summation Notation and the Radius of Convergence

    Homework Statement Find the Summation Notation and Radius of Convergence of this series. 5, x, 10, x, .... The Attempt at a Solution I don't know how did they come up with that equation.. But the summation seems right.. Can anyone tell me how did they arrive with that equation? I've tried...
  23. M

    How fast must a coil be rotating to produce a certain current

    Yeah, I just used the equation Emax = wNBA, and Emax=ImaxR since when E is max, the sin(wt) should be equal to 1. And my answer is 19rev/s For the second problem, I got around 1.9m/s. I don't know if I used the right equation. F=ILBsinx, F=mgsinx, E=-BLvcosx, E=IR, ending up with...
  24. M

    How fast must a coil be rotating to produce a certain current

    Additional question, how can I resolve the forces in x and y component? All I know is that Fx=m*a*cos(theta). I don't know for Fy.
  25. M

    How fast must a coil be rotating to produce a certain current

    What I have in hand is 116.504rad/s using the equation IR = wNBAsin(wt), with the assumption that the sin(wt) will become 1. (A=area, N=number of turns, w=angular speed) I don't know how will I obtain t. I don't know also if my answer is right..
  26. M

    How fast must a coil be rotating to produce a certain current

    Homework Statement The Attempt at a Solution For letter A, my guess is ξ = dɸB/dt, ɸB = BA (since both magnetic field and the area are constants) After substituting, I ended up with a hanging \frac{d}{dt}.. I'm quite confused. For letter B, I don't know. Will I use the same...
  27. M

    Kirchhoff's Rule Cap-monster maze

    I already got the Res-monster maze. The problem is the one battery, which will have a positive sign. So the answer is 2A. :) And what's with Nano? Hmm? But my answer is correct, right? Naah, I got it. It's MICRO, not NANO, right? hahaha
  28. M

    Kirchhoff's Rule Cap-monster maze

    Well, the attachments says it all, the cap-monster and res-monster maze. I want to know if I made a right decision about my answer. Cap-monster maze ξ - q/C = 0 Then q = 60(nano)Coulomb. Res-monster Maze -ξ1 - ξ2 - ξ3 - ξ4 + IR = 0 I = 4A. Am I right?
  29. M

    Newton's Law of Cooling air temperature

    Homework Statement At 1:00PM, a thermometer reading 70oF is taken outside where the air temperature is -10oF. At 1:02PM, the reading is 26oF. At 1:05PM, the thermometer is taken back indoors, where the air is at 70oF. What is the temperature reading at 1:09PM? Homework Equations The Attempt at...
  30. M

    Homogeneous Equation?

    Oh, I see. I'll try to re-solve the problem tomorrow. I'm quite tired right now because of the assigned activity for our group. Thanks for the hints.
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