Please Help Me

Discussion in 'The Projects Forum' started by serdar, Mar 12, 2013.

  1. serdar

    Thread Starter New Member

    Mar 12, 2013
    9
    0
    Dear Friends,


    [​IMG]

    I did not make following connections on breadboard I am new..
    by passing resistor of 2 end confused my mind?
    please help me?
    Regards


    [​IMG]
     
  2. DickCappels

    Moderator

    Aug 21, 2008
    2,662
    633
    The regulator maintains a constant current by maintaining a constant 5 volts across R2. If you put capacitance in parallel with R2, the circuit's will not be able to adjust the current quickly when the circuit voltage and load change.

    Does that answer your question, or were you asking something else?
     
    serdar likes this.
  3. serdar

    Thread Starter New Member

    Mar 12, 2013
    9
    0
    I am asking i did not built this circuit on bread board.. Would you please show me on bread board how is going to be connections please??

    because of connection from 2 to the end of resistor confused me too much?
     
  4. JohnInTX

    Moderator

    Jun 26, 2012
    2,348
    1,029
    Figure 4 here shows your hookup for a constant current source as DickCappels indicated. The formula for calculating the constant current is also given.

    R1 at the input is needed only if the battery voltage causes the voltage ACROSS the regulator to exceed max.

    Note that your schematic is for a constant current source. If you want a constant VOLTAGE, connect it like Fig. 1. In this case, a resistor at the input is sometimes used to dissipate some power before the regulator. Its a poor way to do it.

    As far as the connecting on a breadboard, the datasheet shows the pins IN, GND, OUT.
     
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  5. serdar

    Thread Starter New Member

    Mar 12, 2013
    9
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    Thank you very much.
    but ı need some info about how to connect this circuit on breadboard?
     
  6. #12

    Expert

    Nov 30, 2010
    16,343
    6,828
    Plug the parts into the holes in the breadboard and connect them to each other with pieces of wire.
     
  7. edwardholmes91

    Member

    Feb 25, 2013
    186
    19
    I think the OP is asking how to use breadboard. Depending on your type of breadboard will depend on how it is connected up... but most breadboards will have either one or two power rails running horizontally along the top and the bottom. Then they will have vertical rails running top to bottom, split in the middle to allow the mounting of ICs and the likes. This website should help you understand how the breadboard works and how you can connect your circuit up: http://www.kpsec.freeuk.com/breadb.htm
     
  8. patricktoday

    Member

    Feb 12, 2013
    157
    42
  9. serdar

    Thread Starter New Member

    Mar 12, 2013
    9
    0
  10. patricktoday

    Member

    Feb 12, 2013
    157
    42
    What??? :D OK, sure, but you'll have to repost the request in the "fishing" section (if you can find it) :p
     
    shortbus likes this.
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