PEE EIGHT Octave Fuzz (only 4 parts) (SOUNDSAMPLES ADDED!)

[~arph]

Or a small resistor and a zener. (7v6 ?)

[DougH]

Sounds a little like a ring modulator. Cool.

[FUZZZZzzzz]

I was trying for a 7805 solution with filtering caps, but you guys can easily beat me with a lower partcount

[FUZZZZzzzz]

Thanks!.. no I'm gonna wait for someone to mod the **** out of it and make it way cooler

Sounds a little like a ring modulator. Cool.

[Mark Hammer]

Not my tonal cup of tea, but for only 4 parts, I am mucho impressed.  Tip o' the hat, my friend.

[DougH]

It's more of a synth sound than a guitar sound, to me. But I like it!

[FUZZZZzzzz]

Has anyone build it yet? I know there's not a lot to verify, but still. I also need to make a new layout with a voltage regulator (perfect voltage for the chip is between 4,5 and 9 volts) if anyone wants to chip in with a stable low part solution, be my guest. I will probably work on it this weekend.

[FUZZZZzzzz]

about voltage dividers.. bare with me.. would this work for this circuit? What kind of power filtering would this need?

[Buzz]

Hey FuZZZZzzz.

Nearly let this one slip by without noticing.

Still got a couple of 567s

Definitely on the build list. Still annoying my bandmates with the Thulsa Doom, Ha ha ha.

[FUZZZZzzzz]

It wont be so impressive on bass I'm afraid.. time to get out the sixstring 

Hey FuZZZZzzz.

Nearly let this one slip by without noticing.

Still got a couple of 567s

Definitely on the build list. Still annoying my bandmates with the Thulsa Doom, Ha ha ha.

[~arph]

I would increase the resistors a bit. Now there is 250 ohms between 9V and GND, meaning that there will be 0.324 Watts on that resistor.. So it'll get hot ,and if you use 1/4 Watt resistors it'll burn out.
Also, check the current requirement of the 567. If you make R1 too big it will get too little current.
I'd still go for the zener option..

EDIT:  It needs max. 13mA   so the max R1 you can use is  9V / 0.013 = 692 Ohms. (680 is a nice close value)
This would give a divider of 680 / 2k7

[FUZZZZzzzz]

thank you arph. still a lot to learn. what would be the big advantage with the zener option over this?

[~arph]

It'll keep the input voltage to the 567 constant with a varying supply. (as long as the supply is higher than the zener value.) With a divider, the divided voltage follows the input voltage.

[FUZZZZzzzz]

cool, thanks! will try both

It'll keep the input voltage to the 567 constant with a varying supply. (as long as the supply is higher than the zener value.) With a divider, the divided voltage follows the input voltage.

[nocentelli]

Or a small resistor and a zener. (7v6 ?)

100r resistor? Why the resistor?

[stonerbox]

I dont know, but it works very well (tried it on my EKO 700 and Stratocaster) Humbucker types seem a bit more pronounced, but it works like a charm nonetheless. Very greenringeresque.
I also used a lpb1 in front to push it a little more ( i dont think its unity by itself)



UPDATE: SOUNDSAMPLES HERE: https://soundcloud.com/fuzzzzzzzz

I freaking love the demos man, they put a big smile on my face!   Nice one!

[garcho]

Bravo! Looking forward to messing with this.

If you haven't, check out Escobedo's/Christian's 'Thing Mod'.

[~arph]

Or a small resistor and a zener. (7v6 ?)

100r resistor? Why the resistor?

To limit current through the diode I believe. I once tried it without and things got heated 

[yeeshkul]

It depends on the current draw - i suppose it will be 5-15mA. In that case use a common diode or even 20mA LED in series with the DC input. No resistor or even a voltage divider is necessary. The diode/LED will drop the voltage 1-2V and it will work as a polarity protection at the same time..

[FUZZZZzzzz]

Thanks for the thumbs up!    Looking from the music in you signature..you definitely have to build one yourself as well

I dont know, but it works very well (tried it on my EKO 700 and Stratocaster) Humbucker types seem a bit more pronounced, but it works like a charm nonetheless. Very greenringeresque.
I also used a lpb1 in front to push it a little more ( i dont think its unity by itself)



UPDATE: SOUNDSAMPLES HERE: https://soundcloud.com/fuzzzzzzzz

I freaking love the demos man, they put a big smile on my face!   Nice one!