Whooper


Posted on Jan 12, 2013

Integrated circuit Ul is connected as a low-frequency asymmetrical oscillator. Its output is inverted by Ql and fed to the reset te


Whooper
Click here to download the full size of the above Circuit.

rminal of U2 at pin 5. Integrated circuit U2 is configured as an audio oscillator and is enabled when the output of Ul is low. With the voltage at pin 5 of U2 constant, the circuit just" "bleeps."" The voltage across capacitor CI is fed to the base of Q2, which turns it on and grounds pin 5 of U2. When the frequency of the reset signal on pin 4 falls, the output frequency of U2 rises. The output then becomes a whoop, starting low in frequency and ending high. Resistor Rl sets the repetition rate and R2 determines the time duration of the whoop. Resistors R3 and R4 set the center-operating frequency.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Door Knock Alarm Circuit
    light sensor circuit
    boarduino wii nunchuck servo
    L497 HALL EFFECT PICKUP IGNITION CONTROLLER
    Loud ringer for phone using KA2411
    Cell Phone Operated Land Rover
    I2C PIC Interfacing Tutorial Circuit



    Top