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.

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