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I need help with a circuit design

Discussion in 'General Electronics Chat' started by bahram2535, Nov 29, 2017.

  1. bahram2535

    bahram2535 New Member

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    Nov 28, 2017
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    hello dear sir
    I've made the Digital Up/Down Selector with 74hc193 and 74hc154 for 16 switching output for variable power supplay
    push up/down key but output 74hc154 random swithing for example jumping output 74154 from 1 to 3 or 6 or 16 switching
    power supply 7805 and capacitance 100uf and 100nf and input used gate 4584 but yet problem
    Please help me another circuit without 74hc193 and no use microcontroler ic simple circuit
    thankyou
     
  2. ronsimpson

    ronsimpson Well-Known Member Most Helpful Member

    Joined:
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    Loveland, CO USA
    Can you scan in your schematic and post it.
    Your problem is "key debounce" or switch debounce. The switch probably does not open/close cleanly. So it will have two or three (on/off) from one switching.
    Please show switch and the circuit up to the counter.
     
    • Agree Agree x 1

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