Any interesting 4046 schematics?

[fuzzmonger]

Hey, folks,

When looking up synthy effects, there's one IC that keeps cropping up - the 4046. Here's a nice example I'd like to try out (if only I could figure out which unlabelled pin the amplified signal enters the chip at :S ) something that changes the timbre of the guitar without messing with the pitch too much.



Something useable would be nice, whenever I think I've found something good it always turns out to be a damned ring modulator (super-fun to play around with, pretty useless unless it's something fancy like a Ring Thing et al)

-Fuzzmonger

[IvIark]

Zombie Chorus

[~arph]

That would be pin number 14.

[glops]

I tried that schematic but couldnt getting anything to work. Google nic Collins hardware hacking book. He has a simPle schematic with a 4046. Sounds ok. After a lot of tweaking and experimenting I was able to get something decent out of it. Fuzzy and synthy sounding but could be refined. I've been meaning to open that box up and see what I did....

[~arph]

Btw, pin 6 and 7 have sawtooth outputs pretty cool too

[timd]

Hey, folks,

When looking up synthy effects, there's one IC that keeps cropping up - the 4046. Here's a nice example I'd like to try out (if only I could figure out which unlabelled pin the amplified signal enters the chip at :S ) something that changes the timbre of the guitar without messing with the pitch too much.



Something useable would be nice, whenever I think I've found something good it always turns out to be a damned ring modulator (super-fun to play around with, pretty useless unless it's something fancy like a Ring Thing et al)

-Fuzzmonger

Does anyone know what this schematic does?

[R.G.]

Does anyone know what this schematic does?

Yes.

[jonasx26]

Does anyone know what this schematic does?

Poor amplifier feeding a less than ideal PLL-setup. It's meant to produce a square wave output from an input signal by locking the PLL VCO to the input (phase comp input at pin 14, missing from schematic).
I wouldn't bother with that schematic. Recommended reading: http://www.ti.com/lit/an/scha002a/scha002a.pdf

[Lurco]

Does anyone know what this schematic does?

Yes.

since 36 years: http://www.diystompboxes.com/smfforum/index.php?topic=45845.0

[electrosonic]

Mark Hammer has some 4046 info on his site.

http://hammer.ampage.org/files/Marston's4046circuits.PDF

Andrew

[timd]

Does anyone know what this schematic does?

Poor amplifier feeding a less than ideal PLL-setup. It's meant to produce a square wave output from an input signal by locking the PLL VCO to the input (phase comp input at pin 14, missing from schematic).
I wouldn't bother with that schematic. Recommended reading: http://www.ti.com/lit/an/scha002a/scha002a.pdf

Could you use an amp chip like the 386 instead of the 4007 and run it to pin 14 of the 4046?

[timd]

I tried that schematic but couldnt getting anything to work. Google nic Collins hardware hacking book. He has a simPle schematic with a 4046. Sounds ok. After a lot of tweaking and experimenting I was able to get something decent out of it. Fuzzy and synthy sounding but could be refined. I've been meaning to open that box up and see what I did....

I tried a variation of this circuit (4046 powered by the 386 instead of the 4049) and it sounds great. Very old school brass like. Reminded me a little a the Brassmaster, but quite different too.