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Need some help to make the (Lirc serial IR receiver)

Discussion in 'General Electronics Discussion' started by manolete, Apr 9, 2019.

  1. manolete

    manolete

    17
    0
    Apr 22, 2014
    HI,

    I'm trying to make this circuit :

    http://lnx.manoweb.com/lirc/?partType=section&partName=circuit

    I bough all required component an I maked the circuit as specified in the diagram but It doesn't work :( My electronics skills are limited and I dont know if I did mistakes or not.

    I have a doubt about the 78L05 regulator. In my case I used the 78S05 regulator. Can it be the problem ?

    here is my ugly ciruit I really sorry :/

    [​IMG]
     
  2. davenn

    davenn Moderator

    13,207
    1,730
    Sep 5, 2009
    Hi there
    Welcome :)

    looking at the circuit from your link,

    [​IMG]


    yeah you have a few problems

    Apart from the shocking soldering

    the 4.7uF cap isn't wired correctly

    You haven't used a 78L05 ... I would have to do a search to see if you have wired the 7805 correctly

    There should be a wire directly from pin 5 of the connector to the IR sensor ....you haven't got that ( this also involves the earlier comment about the 4.7uF)

    The soldering on the back of the connector is so bad, I wouldn't be surprised if there were solder bridges between multiple pins


    unsolder it all and start again
    When soldering joints, take the solder and the iron tip to the wired and just use a small bit of solder
    DONT put solder onto the tip of the iron and then carry it to the wires, that's how you get the bad joints as shown


    Have another go and post photos of the results :)


    Dave
     
  3. sam.m

    sam.m

    3
    0
    Apr 13, 2019
    I suggest you to use a USB to Serial converter. It's cheap and makes the life easier, at least you can use a better computer port and second just you can deal with logic levels
     
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