Uses for a 0 to 9 Counter?

Discussion in 'General Electronics Chat' started by Musical, Aug 12, 2018.

  1. Musical

    Thread Starter New Member

    Sep 10, 2017
    2
    0
    Having recently watched one of Fran Blanche's youtube videos I thought it would be fun to put together my own 0 to 9 counter.
    Luckily, I had enough parts around including some old IC chips. The circuit is pretty straightforward:

    555 timer at about 1 Hz -> SN74LS90N 0 - 9 counter -> SN74LFS48N -> CC 7 segment LED

    with some LEDs: one on the clock line and one on each of the BCD lines.
    While the blinking LEDS are pretty and seeing the numbers 0 - 9 is neat, it lead to a question for me:

    What are the uses for this circuit as a piece of test equipment?
     
  2. LesJones

    Well-Known Member

    Jan 8, 2017
    1,450
    342
    I single digit is not much use but you can cascade a number of counter stages to display as many digits as you want. You could then count items going past on a conveyor belt for example. There are many more things you could use it for.

    Les.
     
  3. danadak

    Well-Known Member

    Mar 10, 2018
    1,596
    330
    Frequency or period counter or digital voltmeter (single slope easy).

    Regards, Dana.
     
  4. Papabravo

    Expert

    Feb 24, 2006
    11,684
    2,455
    A FSM with 2-10 states. A 1-state machine is trivial and uninteresting.
     
  5. digsys

    New Member

    Jun 27, 2018
    24
    8
    Connect a sensor to the 555 - eg Sound, light, wind etc and have it affect the 1Hz .. so the scan rate will reflect the intensity of the sensor.
     
  6. Musical

    Thread Starter New Member

    Sep 10, 2017
    2
    0
    I appreciate the replies and as a result started to discover some (new to me) things. A single slope digital voltmeter has peaked my interest - is there a book which you might suggest for further reading?
     
  7. danadak

    Well-Known Member

    Mar 10, 2018
    1,596
    330
    If you google "single slope a/d" you will find several ap notes
    on web discussing this architecture on web.

    Regards, Dana.
     
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