easy ring modulator? layout?

[nag hammadi]

i need a quick and dirty ring mod.  anyone got a quick easy layout?

[tcobretti]

I've had some pretty good luck with just an AD633, an Atari Punk Console, and a compressor/booster driving the guitar.  If you look at the datasheet for the 633, it'll show how to wire up two input jacks and one out.  You run an oscillator of some kind into one input and guitar into the other. 

[nag hammadi]

hmmm.  i have been thinking about the atari punk thing.  which is the best layout for that?

[tcobretti]

I built this one.  Worked like a champ.

[Gila_Crisis]

a cool simple ring mod is the Nyquist Aliaser. i built one and work fine!

http://www.lynx.bc.ca/~jc/nyquistAliaser.html

http://moosapotamus.net/IDEAS/nyquist/nyquist.htm

another simple is this one:
http://www.lynx.bc.ca/~jc/pedalsBalancedMod.html

[choklitlove]

escobedo's thing modulator is "...a very simple, very low power pseudo ring modulator."


i have a layout for it:
http://geocities.com/worthekik/thing.html

maybe you can verify it.  good luck!

[smnm]

escobedo's thing modulator is "...a very simple, very low power pseudo ring modulator."

I'd go for that but the LMC567 chip is very hard to find. If you find a source please post and tell us, as I think a few people are looking out for it.

For more ring mod discussion - see http://www.diystompboxes.com/smfforum/index.php?topic=47132.0

For my 2 cents, I'd say this is v easy, and a 'Real' ring modulator to boot, rather than a ring-mod-alike, but you need a carrier signal (a simple 555 tone generator, or the Atari Punk thing would be good):

http://www.cgs.synth.net/modules/cgsrr.html

OR: Super-simple, but with a ton of carrier bleed throug, this is 'the old Hemmo circuit' referred to above, replace the LDR with a pot:

[The Tone God]

I'd go for that but the LMC567 chip is very hard to find. If you find a source please post and tell us, as I think a few people are looking out for it.

Digikey has them.

Andrew

[doug deeper]

i think smallbear has that chip too.

[tcobretti]

For my 2 cents, I'd say this is v easy, and a 'Real' ring modulator to boot, rather than a ring-mod-alike, but you need a carrier signal (a simple 555 tone generator, or the Atari Punk thing would be good):

http://www.cgs.synth.net/modules/cgsrr.html

So everybody knows, this circuit and the AD633 do essentially the same thing, but the 633 needs power.  What I suggested above is certainly not a perfectly functioning ring mod, but it'll get you in the ballpark.  The Thing Modulator is something I have wanted to try, and I finally have the chips in the mail.  I couldn't find them forever, and I just checked small bear again to verify that he doesn't carry them.  However, with as much trouble as people are having finding them, and as popular as a topic as ring mods are, Steve probly should carry them.

[doug deeper]

http://www.smallbearelec.com/Detail.bok?no=503

[tcobretti]

That's the LM567 and different from the LMC567 and won't work IIRC.

[Dragonfly]

heres a "quick and dirty" layout for the Thing Modulator...not verified, but should be just fine....

AC

http://aronnelson.com/gallery/album20/THING_MODULATOR_VERO

[The Tone God]

Just to be clear Digikey does carry the actual LMC567 as well as the LM567.

Andrew

[doug deeper]

hmmmmm, i could swear i built one with the lm chip...

[tcobretti]

To expound on the lm567 vs lm567 I found this thread:
http://www.diystompboxes.com/smfforum/index.php?topic=27744.msg186755

panasonic_youth says: "nah, did a little searching, and for what im using it for i wont need to use the LMC chip. the reason tim changed it is because of all the noise he was getting  from it when it was off w/ the LM chip, so he added the cap and the resistor from the + into the LMC567. from what i read if i use the LM567 and take out that resistor and cap it wont matter, i'll just get fuzz. it doesnt matter to me thouhg, i have a breadboard."

Tim Escobedo says:  "Using the LM567 won't give you fuzz so much as a ring modulator-like effect with lots of constant oscillator feedthrough. Using the LMC567 and the RC network cuts back the oscillator feedthrough to a more reasonable level, giving a more usable ring modulator sound with a internal oscillator that quiets significantly when the input signal is low."

So, the lm567 will work, but the oscillator will be much more audible, which drives most people crazy.  So I was wrong; I thought it wouldn't work at all.  I have some LM567s, I guess I should try it out.

[smnm]

So, the lm567 will work, but the oscillator will be much more audible, which drives most people crazy.  So I was wrong; I thought it wouldn't work at all.  I have some LM567s, I guess I should try it out.

The oscillator sound is there with the LM567, but it's not unbearable, considering the limited application of these kinds of noise effects, and isn't so evident on the low frequencies. I made one with the pot mounted on the side of the box so I can roll it back and forth with my foot, but I'd like to try the CMOS version with the RC network too.
I made it with the Dragonfly Thing Mod layout, but bypassed the resistor on the power supply (IIRC).

Thanks for the DigiKey heads up on the CMOS version - their handling fees are pretty high since I'm in the UK and spending less than $25 (as I just got a big order from Banzai), but National Semiconductor still send out free samples from their site - they also have a $10 handling fee but it's a better deal, so I'm going for that instead.

[choklitlove]

i tried the thing modulator with a "LM567CN".  should this have worked at least a little?  i just want to check before i order another chip.  it might be the layout, but i'm getting no output.

here's a datasheet for lmc567:
http://www.datasheetarchive.com/datasheet.php?article=2029454

and the lm567, lm567c, cn, cm, ch, etc.:
http://www.datasheetarchive.com/datasheet.php?article=2026117

[The Tone God]

... but National Semiconductor still send out free samples from their site - they also have a $10 handling fee but it's a better deal, so I'm going for that instead.

Free samples...

Andrew

[Dragonfly]

... but National Semiconductor still send out free samples from their site - they also have a $10 handling fee but it's a better deal, so I'm going for that instead.

Free samples...

Andrew

agreed...too many people abuse this priviledge and they'll stop doing it...i've received 5 free opamps in the last 3 years, all because i had actual interest in prototyping for a product to market.

but...i guess pushing my "ideals" on other people isn't the right thing to do either....

AC