7490 Decade Counter Circuit

Discussion in 'General Electronics Chat' started by hondabones, Jul 16, 2010.

  1. hondabones

    Thread Starter Active Member

    Sep 29, 2009
    123
    1
    Does anybody have a clue as to what the diodes and resistors are for in this circuit? If so, where do the other ends attach?

    [​IMG]
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,346
    Hello,

    The diodes attached to the 200 Ohm resistors at the counter are leds.
    The cathodes are connected to ground.
    They are used as indicators.

    Bertus
     
  3. hondabones

    Thread Starter Active Member

    Sep 29, 2009
    123
    1
    Ahhh... But of course, Thank You.
     
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