Christine!!!

[duck_arse]

if you are using opamps front and rear [with the required bias],

but you will add a bias network for the opamps, won't you.

What a persistent guy..!!!

do you think I got the message across, or should I try again?

Now input buffer is low on both inputs but ramps up to 8v on the out, and all 3 on the output buffer sit at 8v. Also, the signal is distorted and low on the output of the input buffer. I'm sure I've got errors to find.

[antonis]

do you think I got the message across, or should I try again?

I'd like you to look on the bright side of things, so another try should make no harm..

P.S.
@Matthew: You're hitting supply positive rail.. Plz, don't do it unless you wish to cruelly torture your buffers..

[Matthew Sanford]

@duck_arse I will I promise! On the breadboard, then I'll have to figure where to put the divider on the board after...

@Antonis I think what is driving me off about it is it was working just fine on the previous breadboard setup without Vb to the op amp buffers... but, I cleared off my breadboard, am going to set up the druid lfo chips and this circuit as well as a few others and I WILL ADD THE Vb!

[Matthew Sanford]

if you are using opamps front and rear [with the required bias],

but you will add a bias network for the opamps, won't you.

What a persistent guy..!!!

do you think I got the message across, or should I try again?

Now input buffer is low on both inputs but ramps up to 8v on the out, and all 3 on the output buffer sit at 8v. Also, the signal is distorted and low on the output of the input buffer. I'm sure I've got errors to find.

Duck! I put the bias (100ks div w/10u de cup, 1M Rb) in n out (double double...). I was having a hell of a time with the volume going low except w/power starve at min, but bumped the 4066 output cap and found it's buffer side leg on the 4066 decup leg chip side and voila! So...a quick volume reduction on the Christine there with a momentary (due to extreme output buffer bias?)

Anyway I ordered flux to fix my builds but breadboarded it. I have a One-Shot middle right here but didn't use it, StompLFO top right, Christine bottom left. Plan to set some others up to mess with together in the waves but...later.

For now Christine, with LFO to gain and oscillator and inverted to power starve. The LFO thump comes through but once in separate pedals I don't think it'll be an issue. You can see the vactrols in the middle. Nothing interesting playing wise, just chords mostly, and waves were mostly ramp, square, scoop, random slopes and squares.

[duck_arse]

nice pants! it seems like you have a real annoyance machine there. at 4:06 about it all came together. do you know Train Kept a'Rollin? and I think you'd get better response with lesser tremolo depth, there's a lot of blank spaces there.

Duck! I put the bias (100ks div w/10u de cup, 1M Rb) in n out (double double...). I was having a hell of a time with the volume going low except w/power starve at min, but bumped the 4066 output cap and found it's buffer side leg on the 4066 decup leg chip side and voila! So...a quick volume reduction on the Christine there with a momentary (due to extreme output buffer bias?)

now. if this says what I think it says, and even if not ..... please, abuse the cmos to your hearts content****, bash the living shit out of it as you will, but, the buffer opamps need to be treated with the level of respect they deserve. the opamp doesn't get starved supply, and the bias doesn't get starved either. power them from the +9V and ground, starve the 4049 as much as you like, that's what it's there for. messing starve with the oppie WILL take it to its twilight zone - could latch and block all your tones etc.

there is no such thing as extreme bias - only none and correct. and correct means mid-supply and stable, in this inst.



**** but, please, don't keep saying 4066. there isn't one here.

[Matthew Sanford]

Aye, 4049UBE. And by extreme really 9v bias voltage.

I do not know the Train Kept A Rolling, I'll find and listen.

I did put the power starve and gain on the same LFO and it's much better than this video. Volume lost to low gain is brought back by low power starve. This video I hadn't yet played around with it, so there's plenty more to be done.

[Phend]

Texas flood ? 

[Matthew Sanford]

So I rushed that recording. I made some short clips of Christine straight, then added CV to gain, add power starve, add inverted to oscillation. Lights are in that order top to bottom.

Forgot to hook pots to One Shot so that later, but all the StompLFO was set around 50% except offset.

[Matthew Sanford]

So I love love LOVE Christine, she has the right amount of crazy for my needs, but sometimes she just doesn't want to talk to me - usually when I try to show her off to friends, but sometimes the Power Starve and Gain may be at odds, or let's face it I probably said the wrong thing.

So I love her, but always want signal. After thinking in crazy ways about it I feel like if I set up a Peak Detector like this, feed the clean signal (maybe after the input buffer) to one and Christine to the other, when Christine cuts out it should feed the clean signal through...yes? I've got a ton of soldering to get done so it'll be a minute before the breadboard comes back out. I will try it after all that, but am I on the right track here? I'd though comparator but I think that might be a Schmitty way to go...

[Phend]

I think you are confusing Christine with Cujo.
Does it sound Doggy ?

[Matthew Sanford]

I think you are confusing Christine with Cujo.
Does it sound Doggy ?

Maybe in a German Shepard way, but considering the flips to low output I don't think, not sure I've met a dog that doesn't want to be heard

Maybe I will grab a tiny BB and see what it does...

[Phend]

As long as it isn't a Saint Bernard you are good to go.

[Matthew Sanford]

Aye, monkey...
But I'll try this volume replacer and see, want it good to go all the time!

[FiveseveN]

when Christine cuts out it should feed the clean signal through...yes?

Only if the signal were DC, and it wouldn't mute the clean part. You need an actual envelope follower and a VCA or two, or at the very least a voltage-controlled switch (JFET/CMOS).

[Matthew Sanford]

Ok, I was kind of spitballing anyway, but that makes sense.

Not sure how to do yet and gotta get through a bunch of soldering before getting into this otherwise I'll not finish anything being scattered efforts like I do... but I was thinking then of this. I did optos to create the bypass, only switching the effect input to ground in bypass. So I was thinking to bleed clean off it when that input ground resistor is in the M Ohms region through a BJT to ground, have an opamp follower through a diode to it's base so it opens the clean to ground if the effect is loud, otherwise if it is closed the clean would come off the collector to an opamp mixer with the wet signal. I'll have to workout the BJT biasing and mixing op amp resistors, but otherwise I think it should work.




(edit: Ok, I think I may work a FET and for it to transfer signal or something, I've always had a lack of clear understanding on those but haven't played with them yet though I've ready RG's bosstech umpteen times.... but maybe ... yea, not now.  I'll figure this one out, gotta fill some PCBs...)

[duck_arse]

anyone building to this/these circuit diagrams need to be aware that there is two backwards caps in both, and one in the first should probably be non-polar or film, but I haven't tested. the 1uF feeding the tone section and the 1uF feeding the volume pot are both backwards. and yes, I know he has god in his name, but they are backwards. the 1uF at the input of the output TL072 [..... let alone the fact neither opamp has any bias shown .....] needs to be measured in circuit for the record, or just use film.

I tried this circuit on the breadboard today, and was wondering what the stinking hot smell was coming from. it was my roasting IC. it turns out those two unused invertors must have their inputs tied to something other than supply ground. as shown, tied to pin 8, Vdd, is the way to avoid toast.

[Matthew Sanford]

anyone building to this/these circuit diagrams need to be aware that there is two backwards caps in both, and one in the first should probably be non-polar or film, but I haven't tested. the 1uF feeding the tone section and the 1uF feeding the volume pot are both backwards. and yes, I know he has god in his name, but they are backwards. the 1uF at the input of the output TL072 [..... let alone the fact neither opamp has any bias shown .....] needs to be measured in circuit for the record, or just use film.

I tried this circuit on the breadboard today, and was wondering what the stinking hot smell was coming from. it was my roasting IC. it turns out those two unused invertors must have their inputs tied to something other than supply ground. as shown, tied to pin 8, Vdd, is the way to avoid toast.

I was curious about the 4 seeming backwards but works great like that so made me wonder if all the inversions made it proper. Those power starve ones, it seemed like a 100 instead of 1K might get it less choppy...

[duck_arse]

inversions - different thing.

the circuit diagram lays there on the paper; it is static. there are no signals on the circuit diagram, they are for real life, outside world, the corporeal. get the polarities right here. inversions, as you call them, are a dynamic thing, phases an shit, only bother signals. doesn't affect the cap polarities [unless ......].

it's not that diffy on this circuit, either. you follow the DC path, in this case around the tone stack. there is one resistor to ground, and all other end points are DC isolated/blocked. so, all connected to polariseds will face (-) end inwards, and outer ends will be (+).

the cmos invertors are being biased to linear, so they will sit at output [and, via feedback, at input] at "some volts", near half "supply". so, positive as regard to ground-ended parts. and the opamp input SHOULD also be biased, to about half, so that gets dicey and needs either measure, so you can argue, or poly, so youse can nots care.

[Matthew Sanford]

It was more of my whimsical thought on it because it works, but it might mean those caps are not gonna have a long life. I do love her though, I don't know, once I got that car... It's like she believes in me.

[duck_arse]

just don't push it.