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  1. slackjack

    Frequency response using SPICE

    I've made a spice netlist of a circuit I am designing. The input to the circuit is an AC signal --> v1 1 0 dc 0 sin(0 34 60). Well I can do a transient analysis on this easily. But I also want to see what happens at the output as I vary the frequency. Unfortunately using .AC simply doesnt...
  2. slackjack

    How about articles

    Hey all, I'm not familiar with PLCs. I only have experience working with the BASIC Stamp microcontroller. Are there any good reads for a newbie like myself? --thank you.
  3. slackjack

    Graphic Circuit Simulator

    Hey all, I've found a applet for circuits simulations. This isnt your everyday circuit simulator. With this one you can build your own circuits and simulate, but when the simulation starts, it shows how the current and voltage interact in the circuit. It also has the ability to show voltage...
  4. slackjack

    How to derive ohms law

    Hey all, I'm curious. How can ohms law be dervied. The only way I can do it is by experiments. How do we arrive at V = IR without any experiments. Thats all  ;D --thank you.
  5. slackjack

    Free Engineering Online

    Hey all, I just started my website using google pages. Its a collection of ebooks, video lectures, and projects that cover the areas of physics, math, electrical/electronic engineering. Do check it out: http://linuxfreak87.googlepages.com/ Its a great resource if youre a college student...
  6. slackjack

    Whats a switching diode?

    I've heard this term somewhere, but I'm unsure as to what a switching diode actually is. Can someone please explain it to me. --thank you.
  7. slackjack

    frequency detector software

    Hey all, Is there such a software package that uses the computer's wireless card to detect frequencies - not internet signals coming from a router, but other frequencies floating around. --thank you.
  8. slackjack

    LED dimmer

    Hey all, I want to make an LED dimmer, that has about 5 LEDs hooked up to a 12VDC supply.  They should gradually  approach their (near) max brightness. But I want this to be done with user intervention. I just close the switch and the brightness increases (and also the opposite must happen...
  9. slackjack

    Interfacing circuits to the PC

    Hey guys, I'm now wanting to interface circuits to the PC. Whether if its for data acquisition, control systems or just to light up a few LEDs or LCD display, it just comes down to interfacing. My question is what interface (port) should I use on the computer - serial port, parallel port or USB...
  10. slackjack

    A huge collection of books!!!

    This site has books software, computer, electrical, and electronics engineering. omg its so many books http://www.box.net/public/5hv4jgeo3e#main Enjoy
  11. slackjack

    Bitme or oink invites?

    Is there anyone thats willing to trade/give Bitme and/or oink invites? I have Demonoid and desitorrents invites. I'm mostly interested in Bitme because I heard it has good academic content. --thank you.
  12. slackjack

    Cant rename folders

    Hey guys, I have a problem. I'm using Windows XP Pro and I cant seem to rename folders on my desktop or folders within folders on my desktop. I am logged in as the admin. Any help? --thank you :)
  13. slackjack

    Preparing for the corporate world

    I will be graduating in 2 yrs with a bachelors degree in computer engineering. I want to know whats the best way to prepare for the "real world". What should I start doing from now to best prepare myself for post-college jobs. I want to avoid receiving a blow in the face. Any advice would be...
  14. slackjack

    Power Supply Project needed

    I need to build a power supply to power my projetcs I am going to build. It should have an adjustable range from 0V - 32V. But I can settle for a range up to say 20V. Most of the schematics I found on the net have an input of 5V DC. Where I am suppost to get a constant 5V DC signal from ??? Its...
  15. slackjack

    Measuring current

    Its there any way to measure current in a circuit without actually placing the ammeter in series with the component? Mayb there is another special device that does this? --thank you  :)
  16. slackjack

    Help with spice node labeling

    I'm a new user to spice(2G.6). I have a problem with labeling my nodes. Below I attached the circuit. Here is my netlist: Example netlist V1 1 0 dc 12 r1 1 1 1k r2 1 2 1k r3 1 0 1k .end I get this error: Less than 2 connections at node 2. How can I correct this? Is there any guides that I...
  17. slackjack

    Flip Flops with Multisim

    Hey guys, I'm trying to design a counter using FF in multisim. I know that I clock signal must come along to for any change to occur in the circuit (I'm forgetting about CLEAR and PRESET for now). What should I use as the souce of the clock in multisim? And another question, what exactly is the...
  18. slackjack

    Help with IR motion sensor

    I'm trying to buld this Left = transmitter Right = receiver This circuit has a transmitter and a receiver. So from what I understand, the interruption in a modulated pulsating beam that is transmitted by an infrared diode and received by an infrared transistor sets off the alarm. So what I...
  19. slackjack

    motion sensor help

    Hello, I need help with building a motion sensor. Nothing fancy, just something simple that I can learn from. If anyone can tell me the parts that I need and how to build it, I would appreciate it. Or you could just point me in the direction of the nearest tutorial, that would be cool. --thank...
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