CVOption
Full tracks of Analog-Monster project on YouTube channel Sushonyo Synth Project
Full tracks of Analog-Monster project on SoundCloud channel Analogmonster
Introduction:
When playing around with the CV2MIDI module I had some more ideas to enhance the functionality of that module. I decided to develop a module to add some sequencer supporting functions and programs: The CVOption module. This works as eight channel control voltage and clock source for a variety of sequencer modes of the CV2MIDI module which makes a a kind of real fun "Modular Sequencer" from it:
It consists of 8 independent channels controlled by 8 "control cells" on the right side.
The module is pure analog with 4 PCBs hosting 2 channels each:
(Above: Please note my "sustainable" (to abuse the bad word of this decade) PCB approach by using very old and used vintage resistors with clear-text resistor values coming from the pre-color-code and pre-pcb times (in fact they propably served in Adolf's table-top radios during the "Third Reich" LOL) and found their way to me when I bought an electronic convolute from the heritage of a dead electronic nerd on ebay...)
Anyway, this module offers a variety of new sequencer modes when used in conjunction with my 8 channel CV2MIDI Converter:
The module provides 8 CV sources and 8 clock sources (CLK), which are adjusted by corresponding control pots.
The clock behavior is controlled by cells on the right module side. Witch each controller cell you set the clock operation for the corresponding channel / step. Switching it to "ON" means a permanent 5V output at the clock output jack. Switching to "CLK" means a normal clock operation. Both are indicated with corresponding LEDs.
For working with the CVOption module a new program was developed for the CV2MIDI converter (Program 5). This program interprets a 5V input at a clock jack as "lock", where the sequence executed by the CV2MIDI converter changes the sequence direction, so you can define a new sequence length. But if you define the lock as CLOCK based the sequence cursor sometimes returns at the lock position, and sometimes not. The sequence gets a randomized length. The situation becomes really weird if you define 2 CLK locks at different positions in the sequence with different speed rates. Then the sequence cursor is caught in different parts of the sequence at different times like a lost ping-pong ball jumping to random segments.
Above: PCBurger and Pasta
Above: As purely analog, channel CV adjustments on the back side
The Circuit
Above: Schema of a single channel
Each PCB (2 channels) has its own PSU adaptor, as the LEDs consume a lot of current.
Both front panel pots are 1k.
The CV unit (U2) operates from exactly 0V to 5V adjusted with the OFFSET and AMPLITUDE trims.
The LFO (A5) operates from 1Hz to the lower audio range.
The clock operation selection logic (Q1, Q4) is controlled by the front panel switch (J5). The clock output modes are set to 0V and 5V and provided at the output via the discrete "OR" logic of Q2 and Q3.
Full tracks of Analog-Monster project on YouTube channel Sushonyo Synth Project
Full tracks of Analog-Monster project on SoundCloud channel Analogmonster
Carsten Toensmann
Home
Disclaimer:
No warranty for completeness or correctness of technical descriptions, schemas or any information provided on www.analog-monster.de/* pages.
Contents of linked pages are in responsibility of the page owners and analog-monster dissociates from them.
All tracks provided on www.analog-monster.de/* pages is in ownership of www.analog.monster.de (except especially marked) and for private use only. All rights reserved.