LED Blinkie

Discussion in 'Electronics Resources' started by Seramai, Apr 26, 2014.

  1. Seramai

    Thread Starter New Member

    Apr 26, 2014
    6
    0
    Can't get the LED to blink on the multisim. Not sure what is wrong.
     
  2. nerdegutta

    Moderator

    Dec 15, 2009
    2,515
    785
    Not all members have installed Multisim. It's better to post the schema as a *.png or *.jpg.
     
    Seramai likes this.
  3. Seramai

    Thread Starter New Member

    Apr 26, 2014
    6
    0
    I posted a reply with a screen shot last night, but don't see it here. Does it show up on your end?
     
  4. nerdegutta

    Moderator

    Dec 15, 2009
    2,515
    785
    Nope.

    Only a ZIP file with a Multisim-file.
     
    Seramai likes this.
  5. Seramai

    Thread Starter New Member

    Apr 26, 2014
    6
    0
    I should have said Logic Converter. Here it is again.
     
    • ILD.PNG
      ILD.PNG
      File size:
      23.1 KB
      Views:
      32
  6. absf

    Senior Member

    Dec 29, 2010
    1,492
    372
    2 things about your circuit.

    1. TTL cannot source much current to light the LED. But if you connect one side of the LED to +5V and use the TTL output to provide logic low, it should work.

    2. Don't forget to add a resistor in series with the LED in real circuit.

    Allen
     
    Seramai likes this.
  7. absf

    Senior Member

    Dec 29, 2010
    1,492
    372
    I simulated your circuit in proteus and connect the LED as I have suggested and invert the output from the OR gate and the LED did light up. But there is no way to switch off the LED. What's the purpose of this circuit?

    Allen
     
    Seramai likes this.
Loading...