4093 Complex NAND Lunetta Module

YouTube via wonkythomas

"New Lunetta module! The one in the middle is a dual gated osc. & dual NAND gate built from a CD4093 Quad 2-Input NAND Schmitt Trigger IC.

Basic idea is taken from Nic Collins 'Handmade Electronic Music' A basic RC oscillator is built around the NAND Gate, with my module there is a panel input into the unused input pin on the chip, this is tied to ground w/ a 100K resistor so if nothing is plugged in the module does nothing, so the oscillator can be turned on & off from a logic signal at the input. Does great 'filter sweeps' & unison voice type fx.

The right hand side of the module is just 2 X 2 input NAND Gates. Inputs have a diode for protection so they can be used with signals from any source.

The patch in this video is basically taking a clock & a tone from the 40106 oscillator module runnning thru the gated osc. into a NAND gate w/ some feedback via a 4077 XNOR. The 40106 clock is triggering the Serge VCS which is triggering a Metalbox Dual AD. The audio output from the CMOS chips is being processed by a Blacet VCA & 2 Lockhart Wavefolders with CV from the VCS & Dual AD.

The changes in rythm / timing result from playing with the VCS Rise & Fall times & tweaking the relative phase of the inputs feeding the wavefolders."