4017 clock osc

Discussion in 'Electronics Resources' started by sheldons, Feb 9, 2013.

  1. sheldons

    Thread Starter Active Member

    Oct 26, 2011
    616
    101
    heres a simple clock osc for driving 4017s etc which can be built quite small and the value of the timing components can be altered to suit .
     
  2. ScottWang

    Moderator

    Aug 23, 2012
    4,854
    767
    using NC7S14 or NC7SP14 to generate the square wave, it really can make the PCB smaller.

    But I having use this IC yet, the IC I were used to generate clock, crystal osciilator, 7414, 74HC14, MC14584, 74LS04, CD4060, CD4011,CD4093,CD4069,NE555...
     
  3. sheldons

    Thread Starter Active Member

    Oct 26, 2011
    616
    101
    this circuit i built and used as a clk osc for a 4017 circuit i built a while back as at the time i had ran out of 4093s and very rarely bother with 555s to clock 4017s so used what i had at the time and it works well
     
  4. lightingman

    Senior Member

    Apr 19, 2007
    374
    22
    Check out the 4047. It is a very versitile astable monostable multivibrator.

    Dan.
     
  5. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    These circuits are 30+ years old.
     
  6. paulktreg

    Distinguished Member

    Jun 2, 2008
    611
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    Always found the CD4011 with two resistors, a potentiometer and a capacitor more than adequate but I'm going back years.
     
  7. sheldons

    Thread Starter Active Member

    Oct 26, 2011
    616
    101
    well i mostly use a 4093,1 gate ,1 resistor one capacitor and there is your clk osc...but as i had none available at the time this is what i used.....
     
  8. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    Blinking LED circuits and police sirens with NE555 are totally hobby circuits- and they exist for quite a long while.

    Most students are well aware of PICs and the so-called Arduino.

    If one wanted a clock base, a PIC is used. Not many people want large capacitors these days or potentimeters. Pushbuttons are much better and it is done with software.

    If you have too many 1489 serial receivers, or inverter gate chips, you can use these too. Any odd number will oscillate. It is a waste though, as with a PIC you don't need the capacitors, and a cheap one will be enough for that.
     
  9. timescope

    Member

    Dec 14, 2011
    298
    44
    I once made a clock out of an unused half of a 4013 D flip-flop using the set and reset inputs. Each had a capacitor to ground and a resistor to the Q and Q' outputs such that if Q was H, the reset capacitor charged etc. I think I added diodes in parallel with the resistors to discharge the capacitors rapidly once the threshold was crossed.

    Timescope
     
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