24 Second Shot Clock Circuit


Posted on Feb 6, 2014

To start in 24 seconds; 24s LOAD SW and Reset SW should be push simultaneously. If not, the count will start in 99. Pulse input can be connected to 555 astable multivibrator but must be calibrated for real time clock. The PAUSE SW must have a Switch Debouncer so that the counter will count normal when counting is paused and then turn-on. When the


24 Second Shot Clock Circuit
Click here to download the full size of the above Circuit.

count reach 00, the NOR gate will have an output of logic1 that will turn on the two transistor. The buzzer will rung and light will turn on. The two transistors are continuously turn-on not until LOAD SW and Reset SW is push. All have a +5v power supply.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Digital lighting controler PIC16F870
    High output 600 Ohm line driver
    Photomultiplier output-gating circuit
    h bridge
    VOX Circuit
    HHO generator power supply
    Garden Railway Sensors
    Effective output 50W distortion rate of 0.003% thick film hybrid amplifier



    Top