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Push Button Sequencer Switch (No ICs)

Discussion in 'General Electronics Discussion' started by iimagine, Aug 13, 2019.

  1. iimagine

    iimagine

    52
    8
    Oct 23, 2013
    You can do it! ICs are overrated
    DeleteMe.PNG
     
  2. Kabelsalat

    Kabelsalat

    111
    21
    Jul 5, 2011
    It would be awesome if you made an animated .gif out of that too :)
     
  3. iimagine

    iimagine

    52
    8
    Oct 23, 2013
    :eek:
    SequencerSwitchV2.gif
     
    Cirkit likes this.
  4. iimagine

    iimagine

    52
    8
    Oct 23, 2013
    Adding another stage: Part counts go way up....yikes!
    SequencerSwitchV3.gif
     
    Cirkit and Kabelsalat like this.
  5. AnalogKid

    AnalogKid

    2,307
    649
    Jun 10, 2015
    In post #3, the first stage comes on when the switch is open.

    ak
     
  6. iimagine

    iimagine

    52
    8
    Oct 23, 2013
    16 Channels! :D
    Using 1 CD4069UB
    DeleteMe10.png
    Built and tested 8 Channels, dont have enough mosfets for 16 lol but it should work.
    Version 3 was revised, only needed a total of 6 fets for 8 channels.
    If only lighting low current LEDs, the 2 P-Mos could just be removed
     
  7. WHONOES

    WHONOES

    734
    151
    May 20, 2017
    Think I spotted some IC's in the 16 channel version.
     
  8. iimagine

    iimagine

    52
    8
    Oct 23, 2013
    Oops.. :oops:
    I forgot about the 'No ICs' topic :D
     
  9. AnalogKid

    AnalogKid

    2,307
    649
    Jun 10, 2015
    There are 2 4069's required for the schematic.

    One way to evaluate the relative "simpleness" of a circuit approach, especially for an amateur building a one-off home or school project, is to count the number of soldered pins. For digital logic, this includes all power and input pins, but not any unused output pins.

    Not counting the switch and the LEDs and their current limiting resistors, which would be a constant part of any approach, the circuit in post #6 has 124 soldered pins. A circuit with a switch conditioner, 4-bit counter, and 4-to-16 decoder would have 55 pins.

    ak
     
  10. iimagine

    iimagine

    52
    8
    Oct 23, 2013
    The whole purpose of why i'm doing this, is to learn the concept, the logical approach to doing things that could mimic the end result from using ready made ICs. Theres a reason why I chose the CD4069UB for the 16 Channel version, it contains 6 simple inverters (Somehow I thought it has 8, thats why I wrote 1 IC). It is all for fun and not practical.
     
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