seeking old circuits of mine

[christian]

Hi, its me a.k.a Hemmo.
I lost all my old notebooks, and I had tons of interesting circuits and one that is just driving me mad,
cause I cant remember it correctly was a phaser that used CMOS inverters as variable resistors.
I was just wondering if anyone who was hanging out here few years back remember if I ever posted that?
Or for that matter, any circuit that I posted?
I also remember building a scrambler-clone that was modified to sound even dirtier and way-sick.
It did have a FET buffer, but Im out for anything else on that circuit..

ch.

[TELEFUNKON]

this one?
from here (last link)?

[christian]

this one?
from here (last link)?

nope, I do know my own site 
I mean if I ever posted any detail on how I connected the inverter as a vcr?
One thing I know is that it was not like this: clickie

ch.

[TELEFUNKON]

you can do an advanced search for your name in this forum...

[Nasse]

Was it ETI 447 circuit? It is on synthdiy.com

[Marcos - Munky]

Hi Christian. You don't know me, but is great to see you online again. I don't have this phaser schematic and don't know if you posted the schematic or any info about it, but I have a few of your schematics. They are:

21st Century Green Ringer, Bazz Fuss, Buzz Box, CMOS Envelope Follower, Fuzzah, Nebula Box Sound Source 2, Noise 567, Noise Box, One More Octave Up, Standard Hemmo Fuzz and 4 oscillators.

Drop me an e-mail if you're looking for some of these.

[christian]

Drop me an e-mail if you're looking for some of these.

You got mail

[christian]

Was it ETI 447 circuit?

Nope, even that does use inverters. Thats what Mike Irwin did too, and it wasnt the same.
I browsed the archives of my old posts and all I could find was perl's phaser schematic that
had an unidentified chip. I had just cooked up my circuit and thought that the perls one used
inverters too. Could have been even the same connection!
All I know is that I applied the CV to either of the power connections Vdd or Vcc,  or both,
grounded the inputs of the inverters (through resistor?), stack a resistor across them and
connected the outputs to the positive input of opamps.

It did work like a charm, with a very wide range, and it would've been easy to build a 24-stage phaser
out of it. I guess I could try that ETI circuit, thanks

ch.

[George Giblet]

It it the EH Badstone,  (first schematic under the Various heading)

http://filters.muziq.be/model/eh/badstone

[Paul Perry (Frostwave)]

Good to see you back, christian! Modulating the Vcc? yeah, that's the kind of inspiration we've been missing!!
As to 16 stage phasers though..... surely one would use PWM??

[christian]

I found Badstones schematic while I was browsing up, but it wasnt nothing like that.
Note that this wasnt borrowed circuitry, but something I came up by myself (dont deny that
someone else would have not discovered this too, though).

If someone happens to have breadboard and some time, could you check out this connection?
http://www.angelfire.com/ego/sitruuna/images/4069_vcr.gif
Ground mark means +1/2Vcc for 9v battery supply. Connect both Vdd and Vcc pins together and drive the LFO there.
This is just one stage, and sorry for the bad drawing :/
Try this as grounded resistor and report.

Apparently perl phaser and Badstone needed to have this bias inverter so lost one inverter per chip (?),
but the way I did gave all 6 to use, and it would be pretty simple to wire a lotta stages with that.

As to 16 stage phasers though..... surely one would use PWM??

I said 24 (at least)
PWM is digital..

ch.

[Paul Perry (Frostwave)]

PWM is digital..

Nope, it's analog as hell! Back  in the old analog computer days, one of the ways to make an analog multiplier, was to use X to control the PWM signal that switched the Y signal on & off... take the chopped output, and smooth it, and you get an output proportional to X times Y.
Actually, PWM is a good bridge beween digital & analog, whihc is why some microprocessors have a PWM section built in.