Help please? How to make a 220V-AC to a 12.5V-DC?

I need help with my project.
I'm new in the subject of electronics so  i really don't know much of the terminology
I also tried making the circuit using multisim, but i was not able succeed in making the 12.5V DC output
i was able to make the rectified output but until there only and most of the time i get an error.
I know some items to be used like diodes and transformer the problems are that i dont know
what to select from the transformers and diodes and resistors and capacitors.
I saw some cicuits but i really dont know what they are e.g. [the huge triangle (not the inverter for logic circuits/TTL)]
as much as possible i want to make a circuit that is made of the lecture scope of  our electronic
these are diodes, transistors[not yet discussed]
i know but minimal knowledge of some components these are capacitors, transformers, resistors
is it possible to make a AC-DC supply w/o transistor?
I want to ask for help of somebody to help me make a circuit diagram in multisim.
i'm asking nicely if anyone can help me.
please dont flame me T_T.
thank you for reading and replying!!!

i need comments on my work. any comments or mistakes you see and please advice me what should i do next
please tell me is the very small ripples i see is normal.
this is going to be my  project for electronics in breadboar and in PCB
Attachments:
power.JPG ‏68 KB
Power Supply [Actual].ms9 ‏224 KB
Power Supply [Virtual].ms9 ‏705 KB

Similar Messages

  • Help Please: How to make a connection pool with mySQL

    Hi,
    I am learning the example codes shipped with weblogic server, which is under ...samples\examples\ejb20\basic\beanManaged. The original connection pool was on cloudscape. I was trying to modify it and make it connect to mySQL.
    In ejb-jar.xml and weblogic-ejb-jar.xml, I replaced "demopool" (which was the original pool name) with "demopool1".
    After starting the server, I tried to configure a new connection pool as following:
    Name: demopool1
    URL: jdbc:mysql:///test
    Driver Classname: org.gjt.mm.mysql.Driver
    Properties
    (key=value): user=none
    server=none
    But I got the following errors:
    <2007-10-5 ??06?30?09?> <Error> <JDBC> <Cannot startup connection pool "demopool1" Cannot load driver class: org.gjt.mm.mysql.Driver>
    What should I do to let the server find the Driver?
    Thanks a lot.

    Hong Qu wrote:
    Thank you Joe,
    I added the jar file location to the startExampleServer script. But when I tried to configure the Tx Data Sources from the console, I got the following error:
    <2007-10-5 ??08?35?17?> <Notice> <WebLogicServer> <Started WebLogic Admin Server "examplesServer" for domain "examples" running in Development Mode>
    setEntityContext called
    ejbFindByPrimaryKey (ID: 0)
    Failed to lookup JDBC Datasource. Please double check that
    the JNDI name defined in the resource-description of the
    EJB's weblogic-ejb-jar.xml file is the same as the JNDI name
    for the Datasource defined in your config.xml.
    <2007-10-5 ??08?38?16?> <Error> <JDBC> <Error during Data Source creation:
    weblogic.common.ResourceException: DataSource(examples-dataSource-demoPool1)
    can't be created with non-existent Pool (connection or multi) (demoPool1)>>
    Do you know where is wrong?
    Another problem is the connection method in AccountBean.java:
    private Connection getConnection()
    throws SQLException
    InitialContext initCtx = null;
    try {
    initCtx = new InitialContext();
    DataSource ds = (javax.sql.DataSource)
    initCtx.lookup("java:comp/env/jdbc/demoPool");First verify from the console that a pool 'demoPool1' exists and
    that you can test it from the console. Then find the DataSource
    you associated with that pool. For an EJB I would suggest a
    TxDataSource. You defined some JNDI name for the DataSource. Use
    that name in the lookup. For instance, if your DataSource's
    JNDI name is 'MyDataSource', the code should do this:
    DataSource ds = (javax.sql.DataSource)
    initCtx.lookup("MyDataSource");
    return ds.getConnection();
    } catch(NamingException ne) {
    log("Failed to lookup JDBC Datasource. Please double check that");
    log("the JNDI name defined in the resource-description of the ");
    log("EJB's weblogic-ejb-jar.xml file is the same as the JNDI name ");
    log("for the Datasource defined in your config.xml.");
    throw new EJBException(ne);
    } finally {
    try {
    if(initCtx != null) initCtx.close();
    } catch(NamingException ne) {
    log("Error closing context: " + ne);
    throw new EJBException(ne);
    I couldn't figure out what "java:comp/env/jdbc/demoPool" was related, so I just replaced "demopool" with "demopool1". Do you konw what "comp/env/jdbc" mean? Is it a location?
    Thank you so much.
    Iris

  • Help please, how to make movie play in nano

    i have a nano, i thought there should be a transfer software built-in,but no.
    anyone can give me this software pls?

    Hey there,
    First, make sure you have your iPod set up to sync videos. To do this, plug your iPod in and head over to the "Videos" tab and make sure they are set to "Sync" and hit "Apply" when you have selected your method for syncing videos. More on syncing videos can be found in the Apple document below.
    http://support.apple.com/kb/HT1333
    Also, make sure the video is in the standard iPod format. Even though it was bought from the iTunes store, it may not be in the correct iPod format. To change this, right->click (or control->click on a mac) on the movie in your iTunes library and choose "Create iPod or iPhone version." The conversion may take anywhere from a few minutes to quite some time depending on the length of the movie.
    Once it is done, try resyncing it to your iPod. Hope this helps.
    B-rock

  • HEY, i have some issue i am using macbook air i5...the problem is that without doing anything 1.5gb of ram out of 2gb always in use ..please help me how to make it normal.

    HEY, i have some issue i am using macbook air i5...the problem is that without doing anything 1.5gb of ram out of 2gb always in use ..please help me how to make it normal....
    and my battery back up is max 3 to 3.5 hours in normal use with web ....is this normal or need some betterment!!!!

    ADEEL UR REHMAN wrote:
    ...the problem is that without doing anything 1.5gb of ram out of 2gb always in use
    No computer can do a thing without using memory. 1.5 GB is very little. It's normal.
    3 or so hours from a full charge may also be normal, for what you are doing. As batteries age, they don't last as long on a full charge as they did when they were new. All batteries eventually wear out, and are easily replaceable.

  • All of my apps on my new ipad2 are not working. I had this iPad about 4 months and nothing bad has happened before this. I need help on how to make my apps stop crashing. All my built in apps are fine though.

    All of my apps on my new ipad2 are not working. I had this iPad about 4 months and nothing bad has happened before this. I need help on how to make my apps stop crashing. All my built in apps are fine though. WHATBCAN I DO TO MAKE MY APPS STOP CRASHING. I ALREADY TURNED IT OFF THEN ON AGAIN AN IT STILL CRASHES. HELPPP!!!!

    Try a reset. Hold the Sleep and Home button down for about 10 seconds until you see the Apple logo. Ignore the red slider.

  • Can anyone help please. how do i get the home button to appear on the touch screen my home button has stopped working?

    can anyone help please. how do i get the home button to appear on the touch screen my home button has stopped working?

    I have same problem.
    However, I am unable to turn on Assistive Touch.
    At one time I was able to activate it, but it went away and now I cant reactivate.
    What is the solution?

  • HELP PLEASE How do I remove my credit info from iOS7. "None" is not there anymore as a selection btw help.

    Please help idk how to remove credit information the "none" selection is gone now ios7 plz help

    Yes it is...

  • Can any body help me how to make the build.xml

    Can any one tell me how to make the build.xml and want to deploy in the iplanet server. I am very new for that. I dont have any idea of build.xml. If any one have code in build.xml please tell me [email protected] Please if any one is having sample exaple please forward it to me. I am waiting for the quick reply. Please its very urgent mail me.

    htpp://ant.apache.org
    http://ant.apache.org/manual/using.html#example
    Good Luck
    Lee

  • Help! How can make a animation change to another....

    Hi !
    Im stuck!
    All i want to be able to do is turn a animation into another
    animation, when i rollover it with the mouse. I know its possilbe,
    i can do it myself in html, surely fireworks can do it too? All i
    can get are static images to work.
    Can anyone help please?

    vega_moo wrote:
    > Hi !
    >
    > Im stuck!
    >
    > All i want to be able to do is turn a animation into
    another animation, when i
    > rollover it with the mouse. I know its possilbe, i can
    do it myself in html,
    > surely fireworks can do it too? All i can get are static
    images to work.
    >
    > Can anyone help please?
    In the Swap image dialog window, click the Image File radio
    button and
    browse to the location of the file you want to swap. In your
    case it
    will be an animation you exported previously.
    Make sure you uncheck Preload Images or the animation might
    not swap on
    the correct frame.
    Linda Rathgeber ACE ::: PVII
    http://www.projectseven.com
    Fireworks Newsgroup:
    news://forums.projectseven.com/fireworks/
    CSS Newsgroup: news://forums.projectseven.com/css/
    Adobe Community Expert - Fireworks
    Design Aid Kits:
    http://www.webdevbiz.com/pwf/index.cfm

  • Help on how to make a stop sound

    i have a little problem, i am creating a web page and my problem here is that on my intro part or home part there is a sound playing
    but if i will go to other pages the sound should stop playing.
    can anyone help me how to do this..
    Thanx in advance:D

    if you're using actionscript to create your sound, you should assign a soundchannel using your sound's play() method:
    var sc:SoundChannel=yoursound.play();
    you can then apply stop() to sc,
    sc.stop();
    to stop your sound.
    or, if you're sloppy and just want a quick fix, you can use:
    SoundMixer.stopAll();

  • Help on how to make a program on Calendar of the year

    I'm new to java programming.
    Our teacher assigned me to make a program for a calendar of the year.
    I'm confused on what to do. Could you give me some tips on how to
    make a successful calendar of the year program?
    What shall I study first to create an output like this....?
    The program should run like this!!!!
    Enter the year from 1990 to year 2050.
    Enter the month of the year entered.
    Then displays the calendar.
    Ex.
    SEPTEMBER 2002
    Sun Mon Tue Wed Thu Fri Sat
    1 2 3 4 5 6 7
    8 9 10 11 12 13 14
    15 16 17 18 19 20 21
    22 23 24 25 26 27 28
    29 30
    Hoping that you would reply.
    Thank you very much!!!

    Don't want to do your homework. You should think about how you might do it yourself first.
    However, the class java.util.Calendar will be useful to you. Read up on that in the API docs.

  • HELP! How to make RRI from BEX query into Workbook with one report???

    How to make RRI from query into Workbook???

    Hi Alex,
    A workbook is a set format of queries, so when you try to jump to another query , you will definitely open another session and hence another excel file. This is the same for web templates also though you have an option of opening the new result in the same window.
    You would have to use some macros and open the query on the same page. A RRI is a query jump and not a drill down . A drill down would be getting more of the dimensions into the query.
    Regards
    CSM Reddy

  • I use OSX version 10.8.5 and iphoto on a MAC.  I upgraded to elements 12 and in IPHOTO it keeps going to Elements 9???  Help please - how do I make it reference the new version???

    I have a MAC and use IPHOTO and had used Adobe Elements 9 as the external Editor and IPHOTO as default.  NOW I upgraded to Adobe elements 12 and IPHOTO only recognoizes Adobe Elements 9???  HOW do I make it go to the new external editor??  I appreciate any help you can provide?

    You need to reset the external image editor in iPhoto's Advanced preference pane to the right version. I assume there's an Adobe Photoshop Elements 12 folder in your Applications folder.  This screenshot is for PSE 10 but would be the same for 12:
    Happy Holidays

  • Please help! How to make alter JFrame

    After we initiate a JFrame, it usually shows on the left-upper side,
    does someone know how to initiate it on the center of the screen?
    And how do we change the background color of a JFrame or a JPanel?
    Thanks in advance

    What has this to do with JSF?

  • Help on how to make an infinite loop with the same space on all images

    HI:
    I made a movie clip with infinite  loop in which there are images that move from right to left something simple like a marquee, and each image has a blank space between  them, but between last and first image there is a more space, how I can do to  make all images have an equal space between each one and that the motion never stops.

    Thanks for your time and answers my friend, but I'm still not be able to achieve what I want, I forgot to tell that I'm doing this by layers, let's say, I have 5 images, (in fact I have like 50 images converted to movie clip symbols) each image has it's own layer, layer 1, layer 2, layer 3, layer 4, layer 5, then I put a 200 frame motion tween on all layers at 30 fps, then I arranged layer 1 on the first frame to the frame 200, the second layer from frame 50 to frame 250, third layer from frame 100 to frame 300, fourth layer from frame 150 to frame 350, and fifth layer from frame 200 to frame 400, by this I mean I put a 50 frame of space on each image but if you can see, the last image has a duration from frame 200 to frame 400, and there's nothing on frame 250 where it is supposed to be another image to match the same blank space of all the others, the movie clip restarts on the frame 400, and there's a 150 frames of blank space between the last image and the first image, I put the gotoandplay on the frame 250, but it abruptly restarts the movie.
    Is there another way to do this ?
    Am I doing something wrong ?
    Please I really really need help on this.
    Thanks

Maybe you are looking for