7 segment clock

Discussion in 'The Projects Forum' started by cool_guy, Aug 7, 2009.

  1. cool_guy

    Thread Starter New Member

    Aug 5, 2009
    Hey guys, I am a newbee in electronics world. I am trying to build a digital clock using 7 segment displays and using 4033 as drivers. I want to display time in 12 hour format. I have connected the 4033's with their displays. But how do I count the time using 555. I tried using 4017 but it doesn't work. I connected the clock pin of one 4033 with the output of 555 generatin pulses of 1Hz and connected its carry out to the clock pin of 4017. I connected the 5 outputs,Q0 to Q4 in OR config using diodes and connected Q5 to reset. But as in 4017 one-out-of-ten is always high so the clock runs randomly and doesn't count.Please help.
  2. Wendy


    Mar 24, 2008