Saturday, June 1, 2013

4093 NAND MiniModular

I got the idea to do a mini modular based on the 4093 NAND chip.  I decided to use each of the gates as an oscillator.  The three knobs across the top control frequency, control voltage, and output amplitude respectively.  The first switch puts some lag on the input control voltage, the second switch changes the oscillator to LFO mode and the third switch switches between continuous and gate mode.  These controls are repeated four times for  each of the NAND gates on the chip.  The top control is a starve connected to the supply voltage so I can reduce the overall voltage supplied to the device.  I made it 1/8" so I could connect to the upcoming MS20.

This video demonstrates the device in operation.


I also tried connecting this to using a keyboard by using the Cv and gate outputs from my Pulse synth.  This worked out well for the gate but the pitch does not change much with the output voltages, about one note per octave.

2 comments:

  1. Hi,

    How can I contact with you in private?

    Regards,
    Gábor

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    1. Sorry I don't check these too often. plasmaportl at gmail dot com.

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