Crystal-timebase


Posted on Aug 29, 2012

An on-board oscillator and a 17-stage divider compose IC1. By connecting a standard 3.58-MHz, television color-burst crystal as shown, an accurate source of 60-Hz squarewaves is generated at the IC`s output, pin 1. Those pulses are then fed to IC2, a 4024 seven-stage ripple counter. Its outputs are connected to different gates in IC3, which is a dual four-input NAND gate.


Crystal-timebase
Click here to download the full size of the above Circuit.

Depending on which position pulse-select switch S2 is on, one of those gates will provide an output/reset pulse of the selected width.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Audio Jammer Noise generator
    20Khz-arc-welding-inverter
    Diode Cmos Stabilizer
    1 KW Watt Meter
    usb audio multiplexer
    double symmetrical power supply
    Sound operated flip flop
    6 static display circuit
    Dance mat schematic circuit



    Top