LCD display without microprocessor?

Discussion in 'General Electronics Chat' started by RRITESH KAKKAR, Jun 18, 2011.

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  1. RRITESH KAKKAR

    Thread Starter Senior Member

    Jun 29, 2010
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    Hello,

    Can we use LCD without micro controller.....??
     
  2. beenthere

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  3. RRITESH KAKKAR

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    I don't understand i was asking a question which be useful to OP also.............

    Ok, as your wish..!!
     
  4. debjit625

    Well-Known Member

    Apr 17, 2010
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    Yes, if you can properly send the data and control signals to the LCD controller, it may be a digital circuit (even mcu are nothing more than a digital circuit) or switching by your hands.
     
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  5. RRITESH KAKKAR

    Thread Starter Senior Member

    Jun 29, 2010
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    OK, i will buy LCD screen character one(simple), what all component it will have behind it...

    As LCD work in AC 2V, is it is build circuit which do this convergence DC to AC??
     
  6. debjit625

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  7. RRITESH KAKKAR

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    Basically, i am talking about the simple one ............
     
  8. RRITESH KAKKAR

    Thread Starter Senior Member

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    Hi,

    Today i got the LCD display it has 16 pin 8 for data, i have downloaded the data sheet pls tell how to use it without any controller only........basic logic gates..!!

    Thanks
     
  9. kubeek

    AAC Fanatic!

    Sep 20, 2005
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    How about posting the datasheet? Or are we supposed to guess?
     
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  10. ErnieM

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    Apr 24, 2011
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    Well... let's see, you need to take the output of the ADC, which is hopefully a parallel output (which is very rare these days indeed), build a logic circuit to parse out the word data into 4 bit decimal quantities, convert them to ASCII characters (probably the simplest part of this project as you just have to set the 4 most significant bits to 0111), and write some sort of sequencer to present each ASCII word to the display and clock it in.

    I do expect you to use a 555 for master the clock.

    By the way, this is going to take dozens of chips and weeks to wire it up. It would probably be quicker to learn how to use a micro controller and do it all inside one chip.
     
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  11. #12

    Expert

    Nov 30, 2010
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    Who puts 5 gold stars on threads, and what do they mean?
     
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  12. kubeek

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    Ok I evened the score a little :) The stars basically mean that Rritesh likes his threads.
     
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  13. ErnieM

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    Apr 24, 2011
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    I brought the rating down some too.

    KIDS: DON'T TRY THIS AT HOME!

    We're professionals, we do this for a living.
     
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  14. RRITESH KAKKAR

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  15. RRITESH KAKKAR

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    Pls reply..........................
     
  16. t06afre

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    May 11, 2009
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    Eh...What do you want to do. Pls reply..........................
     
  17. RRITESH KAKKAR

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    Jun 29, 2010
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    RS INSTRUCTION/DATAREGISTER SELECTION RS= 0 : INSTRUCTION REGISTER
    RS = 1 : DATA REGISTER


    R/W READ/WRITE SELECTION R/W = 0 : REGISTER WRITE R/W = 1 : REGISTER READ


    E ENABLE SIGNAL


    These function i don't understand, in LCD display what the use of registers in this ??
     
  18. kubeek

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    RRITESH KAKKAR likes this.
  19. RRITESH KAKKAR

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    I want to know, what use is this??
    Is this LCD also like up??
    i am not getting it....
     
  20. kubeek

    AAC Fanatic!

    Sep 20, 2005
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    Iam not getting any of that. In english, please.
     
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