Looping Gain Sequencer
The Looping Gain Sequencer is a sequencer based arbitrary wavefolder. The SEQ IN waveform is divided into 8 segments by voltage. The sequencer is addressed by on of those 8 segments. Each stage generates a CV which is available at SEQ OUT. and also controls a balanced modulator driving it from unity to inverted unity.
The grouping of 8 stages can be reduced in overall voltage and looped up to 8 times with the Loops control.
The sequencer controled balanced modulator modulates either the input at SEQ IN or the ALT IN. The amount of modulation is controlled by the SEQ LEVEL controls
Build notes
Construction is a panel PCB and a component PCB
Both PCBs have circuitry
IMPORTANT: The module needs to run on +/-12V. The AS3360 VCA chip can't be powered by -15V. If powering with 15v use the regulators in the lower left of the component PCB and wire their output to POWER IN.
NOTES ON COMPONENT VALUES:
Capacitor C107 on the BOM and Schematic is 5n, 4.7n will work there
2 Resistors R127 and R130 are 38K, 39K will work fine there, or any value in between.
Current build is Version 1.0
Download the schematic here: Gain Sequencer schematic
Download the BOM:Gain Sequencer BOM
Download part placement: Gain Sequencer part placement
Download trimming Instructions: Trimming
Module getting started guide: clee Gain Sequencer guide
inteactive bom:ibom gain sequencer
For +/-15 Volt systems :
The 3364 VCA chip can't run at 15 volts. Instal the 12 volt regulators and wire their outputs to the 12 volt power in
Soldering LEDs
stuff the LEDs into the pcb without soldering. Attach the panel PCB to the panel and insert the LEDs into the bezels so they’re seated. Then solder LEDs into place.