marker generator

Posted on Feb 7, 2014

Resistor between pin 10 and 11 is a 100K Ohm one, the other a 2K. Fixed capacitor was by trial and error, to get crystal on the exact frequency, somewhere near 39pF and the variable one a little more: 39+20var, see 4060 datasheet. The output circuit on the above image wasn`t tested (just normal cap coupling was) but I`m sure it will give nice peaks because diode will conduct very shortly on the down flank of the square wave,

marker generator
Click here to download the full size of the above Circuit.

generating lot`s of 10Khz harmonics and more than the simple square wave. I need a scope to verify that. maybe next year.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    10 Watt Power Amplifier (TDA2030)
    Low Power Voltage Doubler
    Remote Control Circuit Through RF Without Microcontroller
    ADUC845 12MIPS 8052 Flash MCU + 10-Ch 24-Bit ADC + 12-Bit DAC
    Neuromorphic Silicon Neuron Circuits
    I2C PIC Interfacing Tutorial Circuit
    Micro Power Transmitting Station
    IR Remote Control Modulation Detector