Maybe this is not the right forum, maybe it is. I’m trying to build my own custom CV splitter/attenuator with reverse voltage toggle switches on top of that! This is because I want to learn how to solder + I want to split my signal from my breath controller into 4 for it to adjust my filter, volume, and 1 or 2 moogerfooger parameters. I also want to experiment with reversed control voltage to investigate the effect it has to have MORE attenuation on some parameters the harder I blow. Default otherwise is of course to have less attenuation the harder you blow for an intuitive increase in volume/filter cutoff etc. I want this to work with BOTH active and passive devices so I want to use STEREO jacks to take advantage of the power supply from the Moogs CV input jacks when necessary but I also want to be able to use it with active devices/mono plugs without damaging anything…
Please see attached picture and IF YOU KNOW WHAT YOU’RE TALKING ABOUT, please say “yes” or “no”: Will this work?!
PS. I know the jacks in the picture is actually mono jacks, but I use them just for illustration as I found a good picture online. Also, I’m not good at drawing schematics “the right way” + I want to visualize what I’m going to see infront of me when I do the soldering, that’s way I did the illustration the way I did. And please no “just buy a CP-251”: I know all about the CP-251, but this is as much a project for the fun of it, as it is to gain the functionality of CV splitting/attenuation.
Thank you for any input on the design! I intend to put it all into a diecast alu guitar stomp box enclosure btw.
Should work as a passive attenuator, but once you start sending the CV signal to multiple outputs you’ll start getting voltage dropouts. For that, you’ll probably need active buffer circuits for the outputs.
For what it’s worth, I just started getting into some CV builds, including a sequencer. I’ve found it helps quite a bit to put diodes in the circuit so the electricity can only flow one way. I made a passive splitter/attenuator, and the CV seems to get sort of divided up between all the outputs. When I made my sequencer i put a diode in front of each output, otherwise every pot i turned effected the output, regardless of what step the sequencer was on.
I’ve heard that diodes eat up some voltage, but my gate signals are triggering my synths just fine…
Thank you all for your input! @aen: Did you make the connections like I did in my picture for your passive CV splitter/attenuator? And with this design you couldn’t “isolate” different voltages to the different outputs but instead got some kind of “voltage leakage” across the outputs? Maybe diodes would fix this as you say, but then I’m worried that my polarity switches will have to go, as they need current to be able to flow both ways(??)
If I settle to be able to split and attenuate and skip the polarity switches, would this be a good alternative for diode to use: http://www.circuitspecialists.com/1n34a.html ?
I will put those in front of each tip on the output jacks, right?
