Noisebridge:Lunetta

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Revision as of 13:34, 19 May 2018 by Johnyradio (talk | contribs) (Intro)
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Intro

A page dedicated to Lunetta Synthesis, the art of repurposing and perverting digital logic semiconductor chips into sound-producing devices. The techniques of Lunetta Synthesis were pioneered by sculptor and percussionist Stanley Lunetta in the 1970's.

In 2014, Noisebridge was honored to host a talk and demonstration by Stanley Lunetta himself. Stanley3.jpgStanley2.jpg

https://www.noisebridge.net/wiki/NoiseHack

This page is a work-in-progress. Feel free to add more info and links, but please try to keep it organized.

General Tips

  • For visual fun, use LED's wherever a schematic calls for diodes.
  • For light-activated control, substitute photoresistors for resistors. Or, use a mercury switch like Stanley did in his gun-shaped device, in the photo above :)

Lunetta Oscillator

The Lunetta Oscillator is the heart of Lunetta Synthesis. It's an oscillator based on a Schmitt Inverter.

Schmitt-osc1.gif

Schmitt.gif

Parts

CD40106 Hex Schmitt. 6 oscillators on a single chip! http://live.partlist.org/331/image/item/open/root/format=big


Variations and Tips

Intermodulation

Drive one Schmitt oscillator with another, through a diode, and using a switch as a trigger:

https://hackadaycom.files.wordpress.com/2015/01/40106_sync_osc.png?w=800&h=326

Gentle Sounds

Most Lunetta syntesizers out there are raucous and chaotic. But sweet, gentle sounds are also possible.

  • Tap the inverter output to obtain a loud, buzzy, digital square wave.
  • Tap the inverter input to obtain a gentle, soft, analog triangular wave. That's the voltage presented by the capacitor as it charges/discharges.

7414-oscillator-waveform-diagram.png

Starvation

Starve or overdrive the power supply to the chip for unexpected results.

Amplification

Use a cheap 3W PAM amplifier module to drive a speaker. Overdrive the powersupply of the PAM with a 9V battery for extra volume (but check for heat).

General Lunetta Synthesis Links


Page created by: Johnyradio (talk) 12:49, 19 May 2018 (UTC)