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  1. slackjack

    LED dimmer

    Thanks for the replies guys. I've got another question about the circuit that Cabwood  drew. Can the circuit be made with only one transistor? Also why wont the LEDS come on just like that, I mean the way I see it the anode is currently more positive than the cathode - shouldnt this cause the...
  2. slackjack

    LED dimmer

    Hey Cabwood, thanks for youre reply. But you said that the voltage linearly drops across the collector of Q2, do we really need to have the transistor in there. Couldnt this be accomplised by just the charging and discharging action of the capacitor? Also I dont understand the need for a...
  3. 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...
  4. slackjack

    anybody use msn messenger?

    I use AIM. For my client I use Gaim. Very simple yet powerful alternative to AIM's client - no ads and that kind of stuff.
  5. slackjack

    Feedback Theory!

    Hi opacheco, welcome to Elab. Here are some books that may interest you: http://www.electronics-lab.com/forum/index.php?topic=4807.0 http://www.electronics-lab.com/forum/index.php?topic=5003.0
  6. slackjack

    Thinking about getting into electronics??

    me confused  ??? I thought that this was the best part of the job.
  7. slackjack

    Interfacing circuits to the PC

    I'll be using TubroC++ for my programs. Is it this project you are referring to Ante? http://www.electronics-lab.com/projects/pc/020/ Theatronics, thanks for the walkthrough, it very much appreciated. But I have decided to use the parallel port as a start becuase I have several books on it  ;D...
  8. slackjack

    Thinking about getting into electronics??

    To find out about more jobs opportunities with your degree, you can seek help from your guidance counselor at ITT Tech. It wont hurt to pay the department a visit before classes start and chat with someone. nanop  link: http://www.careercornerstone.org/engtech/etearn.htm
  9. slackjack

    Good book for beginners?

    You can download electronics for dummies here: http://www.box.net/public/5hv4jgeo3e#f717969 Check out our electronic resources section for links to tons of other books. We also have the The Art of Electronics which is very good. http://www.electronics-lab.com/forum/index.php?topic=6168.21...
  10. slackjack

    Interfacing circuits to the PC

    Well for now I'm going to use windows xp (mayb later I'll worry about interfacing with linux). Ante can you please elaborate on "software". For now I plan to control, but later I will be using sensors hooked up to the computer. I dont understand what is meant by "channels". I guess (talking...
  11. slackjack

    A huge collection of books!!!

    None of the files I've downloaded need a code. Most of them are just plain pdfs and rarely rar archives. Thats odd, i dont need to sign up to download files or browse (nor do I even have an account there). Cant you download any files?
  12. slackjack

    Happy 4th of July!

    Good one...
  13. 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...
  14. 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
  15. 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.
  16. slackjack

    Happy 4th of July!

    Thanks Ante. 4th of July is very noisy around here  ;D
  17. slackjack

    Multisim 8 HELP!!!!!

    Switches are found the "Basic" family. Baisc --> Switch Also rotary switches (4 - 8 positions) can be found in Electro_Mechanical --> Supplementary_Contacts (I think this is what you are looking for).
  18. slackjack

    excess-3

    The 7447 is the BCD to 7 segment decoder. What you have to do is feed the output (binary) into the 7447. Consider the following: Here you can see four inputs - A,B,C,D (the input will of course be the output from your calculator. The outputs a - g, will go to the respective pins of your 7 seg...
  19. slackjack

    ???big help pls???

    Hi misha14, I think you indirectly answered what decoupling means. It used to block dc signals i.e. it prevents the mixture of the ac and dc signals. In order to do this we can use a capacitor, which btw has an infinite resistance for dc, therefore it blocks it and lets the ac signal through...
  20. slackjack

    psssttt!! pinoyS!!!

    Hi misha14, Here is something similar to what you wanted. http://ourworld.compuserve.com/homepages/Bill_Bowden/opamp.htm
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