CV inputs to for more bending!

Started by Matthew Sanford, July 06, 2023, 05:21:50 PM

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Matthew Sanford




So I need ideas or vetting of mine. I built a StompFLo datasheet except added TRS jacks between the circuit and pots so I can send 0-5v into each to use waves to mess around. T = wiper, R = 5v, S = ground. My PWM out is just TS, tip being the PWM... Plan to set another to use the One-Shot chip too....and another to have an envelope follower generator and possibly buffer the guitar signal for an out too, we'll see....expression pedal too... Any other drivers I should use?

Anyway, anything that takes CV is pretty simple to set, I figure the attached picture thing will do that all (T to wiper, R to pin 3, S to pin 1) though will the floating 5v cause issues? Hmmm. Well, other being messing with stuff. I'm going to set up a PT Wobble with a vactrol on the 6/4 thing, possibly with an emitter follower to send the 5v to it and CV to mess the base no disconnecting pots there. The repeats mix poses a more difficult situation - I figure either a static resistor and a vactrol or two of those, possibly with CV to a follower to npn to vactrol in the one case, or to a TL072 with one inverting (and offsetting to positive?) to drive the two vactrols in opposite directions. Other thought is npns instead of vactrols, though likely other variable resistance options are possible too.

I plan to get it all in one box eventually, once I figure which ways I like it, but for now do a Filter FX and PT Wobble but also want BassBallz and Distortion+ with those options too - bassballz for lfo instead of internal envelope, distortion to mess with the distortion pot but also maybe variable resistance to vref too. I suppose though that these uses where the circuit isn't set up to be processing some voltage that gets replaced by the CV would need additional circuitry build between the TRS and the board, basically in between the existing pot and the circuit that wasn't there initially. Any ideas on how to do it sensibly? I kinda wish I could put another switch into those TRS things, maybe an inbetween passive thing with TRS jack & plug to set it there, or think of a way where disconnecting the pot sends something low to send the tip someplace it needs to be, but pondering at work isn't helping me too much...


"The only knowledge is knowing you know nothing" - that Sew Crates guy

Controlled Chaos Fx

Matthew Sanford

Perhaps extra circuitry in the driver, a V+ option but also one to be resistance and one ground centric?
"The only knowledge is knowing you know nothing" - that Sew Crates guy

Controlled Chaos Fx