MULTIDIGIT DEMONSTRATION COUNTER


Posted on Feb 6, 2014

Simple interconnection of RS7490 decade counter RS7447 decoder, and 7-segment digital display for each desired digit makes ideal counter for classroom demonstrations and Sci-ence Fair exhibits, With two additional stages added, display reaches 9999 before recycling. Use 1N914 diode in series with battery to protect against polarity reversal and


MULTIDIGIT DEMONSTRATION COUNTER
Click here to download the full size of the above Circuit.

reduce supply to 5 V for ICs F. M. Mims, "Integrated Circuit Projects, vol. 6, "Radio Shack, Fort Worth, TX, 1977, p53 63.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    0-15 Volt Tracking PS
    Digital Clock with 6 nixies
    Programmable-frequency-sine-wave-oscillator
    Car audio amplifier
    audio peak level indicator by op amp
    High Current LM317 CV Power-Supply
    Crystal oscillators
    555 transistor characteristic curve tracer circuit diagram
    0-1 hours of power a circuit diagram of the timing of the AC power supply



    Top