Quad Oscillator using 4093 [tutorial]

After SITS oscillator, let’s try making combining some oscillators into one sound output. There’s many ways for us to build a lo-fi instruments from cheap electronics part that we can easily find in the nearest electronic store on our town. For an example is the Quad 2-input NAND gate CD4093 (Integrated Circuit / IC) which is only about Rp. 2000,-. Like the name, this IC have 4 nand gate which each of the gate can be easily transform as an oscillator. The oscillator will produce square wave sound as Nandgate produce binary signals as the output. There are many tutorials about using this IC, my personal favorite is micro-noise from Swiss Mechatronic Art Society (SGMK) and this simple 4 block Quad Oscillator from Flux monkey which I highly recommend for those of you would like to learn basic understanding on oscillators. In this post, I’m sharing the Quad osc that I modified from flux monkey along with schematics, PCB layout and print in EagleCAD files. Check the video above to see how it sounds. :)


quad oscillator 4093 schematic

Part List:

  • CD4093 IC
  • 4 Potentiometer (R1-R4), I used 10K, 20K, 50K and 100K
  • Resistor 600 ohm
  • Capacitors (C1-C5), I used 10uF, 2.2uF, 0.1 uF, 0.01 uF and 1uF. Try different value and type of capacitor will result different sound (the higher the value, the lower sound the oscillator will produced)
  • 3.5 mini audio jack
  • 9V Battery Clip
  • Switch On/Off
  • LED

Board Layout

quad oscillator 4093 board layout

PCB Print

quad oscillator 4093 PCB print

4093 pinout

CD4093 pinout


Quad Oscillator 4093  squaresolid pic

EagleCAD files:

Quad Oscillator 4093 Schematic [>>download<<]

Quad Oscillator 4093 Board [>>download<<]

16 thoughts on “Quad Oscillator using 4093 [tutorial]

  1. Pingback: Hex Oscillator using 40106 [tutorial] | andreas siagian

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  3. hey, great tutorial. i’m about to build such a little thingy. just two questions: are you using linear or logarythmic pots? and can i really use any kind of value, as far as the capacitors are concerned? i would like to have a rather low, dronelike sound.

    • thanks! i’m using a linear pot because i don’t have log pots here in indonesia :( but log pots definitely better for the circuit. and yes you can use any kind of value of capacitor, i definitely recommend you to experiment to get the frequency you desire off. just remember that bigger capacitor value will result lower frequency. and in the case of sound circuit, you might want to avoid using ceramic capacitor (for high frequency) as their characteristic is not very suitable for sound signal. hope this help :)

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  9. This is awesome! Space sounds synthesizer music from the 70’s! I am going to build one…

  10. Hi, years ago I built one of these and it works great! Now I would like to turn it into a modular oscillator. Do you think there is any way to include a CV input?

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