Connect with us

Simple LED Circuit help.

Discussion in 'LEDs and Optoelectronics' started by Harlequinzombie, Aug 31, 2013.

Scroll to continue with content
  1. Harlequinzombie

    Harlequinzombie

    32
    0
    Aug 31, 2013
    Could anybody possibly show me how this would work on a breadboard? Or even on the actual circuit board itself. It's my first circuit and I'm a bit lost on what to do.

    [​IMG]
     
  2. duke37

    duke37

    5,364
    771
    Jan 9, 2011
    The circuit drawing and design could be improved.

    It is convention that the positive is at the top, then the conducting diodes point downwards.

    The leds should not be connected in parallel, you should use a separate resistor for each led.

    The breadboard has a conncting bus down each side. The battery should be connected to each bus. The board has cross conncted busses whic can be used to connect components together.
     
  3. Harlequinzombie

    Harlequinzombie

    32
    0
    Aug 31, 2013
    Okay so how should I draw the diagram?
     
  4. davenn

    davenn Moderator

    13,812
    1,945
    Sep 5, 2009
    rotate it 180 degrees would be great :)

    its a kind of convention to also have the power supply on the left side of the circuit

    you can use 1 resistor ... not really a problem ... but it is good practice to have a resistor for each LED

    Dave
     
    Last edited: Aug 31, 2013
  5. Harlequinzombie

    Harlequinzombie

    32
    0
    Aug 31, 2013
    I'm still not sure how it should look on the circuit board itself.
     
  6. davenn

    davenn Moderator

    13,812
    1,945
    Sep 5, 2009
    redraw you circuit correctly for a start and repost it :)

    are you going to use one of those solderless experiment breadboards ?

    a great idea for learning
     
  7. Harlequinzombie

    Harlequinzombie

    32
    0
    Aug 31, 2013
    I was planning on it. To see how it works before I did any actual soldering to the circuit board.
     
  8. davenn

    davenn Moderator

    13,812
    1,945
    Sep 5, 2009
    thats good :)
    do you already have a breadboard ?
     
  9. Harlequinzombie

    Harlequinzombie

    32
    0
    Aug 31, 2013
    Yes I do. Also, is this any better?

    [​IMG]
     
  10. davenn

    davenn Moderator

    13,812
    1,945
    Sep 5, 2009
    much better :)

    ok so I assume you have one of these breadboards .....

    [​IMG]

    or at least one that is much the same ?

    Dave
     

    Attached Files:

  11. Harlequinzombie

    Harlequinzombie

    32
    0
    Aug 31, 2013
    Yes, that's actually the exact one.
     
  12. davenn

    davenn Moderator

    13,812
    1,945
    Sep 5, 2009
    cool
    so do you understand how the holes are connected together on the board ?

    D
     
  13. Harlequinzombie

    Harlequinzombie

    32
    0
    Aug 31, 2013
    A very loose understanding. This is something entirely new to me.
     
  14. davenn

    davenn Moderator

    13,812
    1,945
    Sep 5, 2009
    OK I have done a mod to that BB pic.....

    [​IMG]

    OK so you can see how the 2 long red and dark blue strips are connected

    we use them for our power rails

    its common to use the red one at the top of the board for the positive
    and the blue right down at the bottom ofthe board as the negative line

    the sample of vertical light blue strips shows how the holes in the middle are connected
    thats the same right across the board ... I have just shown a few of them OK

    Dave
     

    Attached Files:

  15. Harlequinzombie

    Harlequinzombie

    32
    0
    Aug 31, 2013
    Ok, I'm following pretty well so far.
     
  16. davenn

    davenn Moderator

    13,812
    1,945
    Sep 5, 2009
    just some hints on B-Board use

    1) ... dont try and poke wires that are too thick down the holes it will damage the contacts ---- keep jumper or component wire thickness to about the same as that on your LEDs
    2) ... its best to use solid wire not stranded wire
    3) ... dont ram the wires in the holes, push them in gently ... else again you could damage the contacts


    D
     
  17. davenn

    davenn Moderator

    13,812
    1,945
    Sep 5, 2009
    OK good

    now, do you have your battery, LEDs, resistor(s) and BB with you now ?

    do you have a selection of resistor values ?

    an edit to a previous comment in the hints ....
    2) ... its best to use solid wire not stranded wire

    you can use stranded wire .... you just need to twist it tight and solder it so its like a solid wire
    you 9V battery clip should be like that

    you do have a battery clip with the red and black wires coming out of it ??
     
    Last edited: Aug 31, 2013
  18. Harlequinzombie

    Harlequinzombie

    32
    0
    Aug 31, 2013
    I have a clip, a switch, 470 ohm resistors, the BB, the 9v, and the LEDS. Also, I have an actual board.
     
  19. davenn

    davenn Moderator

    13,812
    1,945
    Sep 5, 2009
    OK great lets start constructing .... I have ~ 30 mins before I have to go out for a while OK

    dont worry about the switch at the moment ... just plugging the red battery in and out of the board is good enough for the switch
    Do you have a camera that you will be able to take pics of your construction and post them here ?

    for a start we will use 2 resistors ... one for each LED OK as suggested earlier in this thread

    1) ... push one end of one resistor into the top red row and the other end of the resistor into one of the blue vertical strip rown

    2) ... take your LED ... see how there is a flat bit on the edge ? ... that will go to the negative blue rail at the bottom ... the other leg of the LED can go into one of the vertical blue strips above the negative rail
     
  20. davenn

    davenn Moderator

    13,812
    1,945
    Sep 5, 2009
    step...
    3) .... you need a short length of jumper wire to go across the centre gap between the blue vertical strips
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-