SV2 means "Square-o, Version 2." Version 1 was a simple square wave oscillator built using 1/6 of an SN74HC14N Hex Schmitt Trigger. Version 2 is very much the same idea, but the dimensions are intended to comply (I think, anyway) with Intellijel/Doepfer Eurorack design specifications. This version also features vertical, mounted audio jacks and potentio...
9V input. Output range: 5V-6V over twelve "keys." Designed to be connected to twelve simple switches or buttons and fed into an oscillator's CV input jack.
Want to buy one pre-assembled by JLCPCB? [go here](https://www.tindie.com/products/diysynthjunk/twelvey-12-channel-control-voltage-interface/)
Note: This design also features a space (currently unused) for a built-in dual oscillator (SN74LVC2...
An expansion of the Chaos Nand drone synthesizer.
This one has been fine tuned so sound is a little bit less out of control. Gate inputs have been added to control the characteristics of the sound from a sequencer (but not its pitch).
* POT1: Main pitch. Controls the 2 main oscillators at the same time, with lovely imperfections so they drift a bit out of tune.
This is a ladder filter based off of the Moog style one from the papers [*Analysis of the Moog transistor ladder and other derivative flters*](http://www.timstinchcombe.co.uk/synth/Moog_ladder_tf.pdf) and [*Generalized Moog Filter: Part I Linear Analysis and Parameterization*](https://aaltodoc.aalto.fi/bitstream/handle/123456789/14420/article5.pdf).