vibrato circuit

[casey]

http://www.designnotes.com/CIRCUITS/vibrato.htm

[petemoore]

Schems scanned [I guess] from old papers look kool!!!

[Marcos - Munky]

Cool, anybody built it?

[nightingale]

ahhhhhh, vibrato circuits~
i love em! too bad i'm in love with my slightly modded t-1 tremelo...(almost as simple)... i would breadboard it up, but i don't have a photo sensor... i am thinking of having 2 trems in my line... one slow, one pretty fast... or maybe a expression pedal to replace the pot of my kay...
i dunno,

[idlefaction]

heh, i've often wondered about that kind of setup.  you'd get a bit of signal loss, which is probably ok, but basically no hope of any noise, power supply clicking or thumping!  cool.

the 566 can do square and tri out, right?  you could add some smoothing and/or clipping to the tri and/or square and get hypertri and sine as well.... hmmm...  

[Rodgre]

Duped again....

I'm salivating over a simple vibrato circuit, and it's just another tremolo!

Those two terms get confused and interchanged all the time.

It's sort of like saying "Phasor" when you mean "Flanger" isn't it?

Well, it's all good. I can't have enough Tremolo circuits for the Tremolo Lounge!

Roger

[mikeb]

In any case, 566s are sadly NLA.

MikeB

[Leftrights]

Please excuse my ignorance... whats the differerance bettween vibrato and tremelo?  Ones pitch and ones volume?

[gez]

Please excuse my ignorance... whats the differerance bettween vibrato and tremelo?  Ones pitch and ones volume?

Here's a nice little link:

http://www.vibroworld.com/magnatone/vibrato.html

[casey]

a 556 is a dual 555,

here is the information:

http://www.talkingelectronics.com/ChipDataE-Book/html/556.html


I think the 556 is still available through digikey:

http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=141151&Row=47793&Site=US

[MAXIMUS]

According to R. G. Keen's GEOFEX Page:

while the terms tremolo and vibrato are often used interchangeably, tremolo is actually variation in loudness, vibrato is variation in pitch or frequency.

[Peter Snowberg]

a 556 is a dual 555

While this is 100% true, That schematic is actually using a 566 which was a neat little voltage controlled oscillator chip that even RadioShack had on the shelf 25 years ago. It had square and triangle wave outputs on different pins. With some buffering and the right components, you can do almost the same thing with a 555, but you have to take the output from pin 6 instead of 3 and use a high impedance buffer.

Take care,
-Peter

[casey]

duh, im an idiot!

i thought that was a 556, it's a 566 chip.

totally different animal all together.

[ExpAnonColin]

Looks like a very very simple LDR based trem.  The same thing can be done with multivibrators.  Very primitive

-Colin