Guitar Fuzz Effect

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Fuzz is one of the classic guitar effects, and this simple circuit generates it quite well. The circuit is so compact that it can be built into guitars or amps that do not have built in fuzz to add that capability to the instrument. The circuit does not use much battery power, so a standard alkaline battery will last many years even with daily use.

Schematic

Parts

Part	Total Qty.	Description	Substitutions
R1, R2	2	100K 1/4W Resistor
R3	1	1K 1/4W Resistor
R4	1	1M 1/4W Resistor
C1	1	100uF 16V Electrolytic Capacitor
C2, C3	2	0.47uF Ceramic Disc Capcitor
D1, D2	2	1N4148 Diode
U1	1	741 Op Amp
MISC	1	Socket for U1, Jacks for Input/Output, Wire, Board, 9V Battery Snap, Case

Notes

You can use any input/output jacks you want, but the standard for musical instruments such as guitars is a mono 1/4" headphone plug and jack.

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Comments

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Annoying David Guitar Fuzz Effect Wednesday, October 28, 2009 11:46:39 AM

I'm fresh whit op-amps why does 9v go straight to ground by passing R1,R2 resistors?

anonymous Guitar Fuzz Effect Tuesday, August 04, 2009 5:28:02 PM

Hi, I'm building my own bass and I want to have a built-in fuzz effect. Would this circuit be any good for a bass or would i need to replace a few components with different values to get a more bass-suited sound?

mandrake Guitar Fuzz Effect Friday, July 17, 2009 10:02:22 AM

PFFF, is not work ! I've make this circuit... maybe is my fault. Is need an amplifier for electric guitar ? I have made this circuit and then e've connect the circuit to my guitar and to battery ( 9V) . Can anyone give me a schema with the connections to this circuit ? (maybe this is the problem)

vincent Guitar Fuzz Effect Tuesday, July 14, 2009 5:09:28 AM

thanks!the fuzz effect is very good but if i want to add foot switch,where i put it?

edi Guitar Fuzz Effect Sunday, March 29, 2009 11:15:08 PM

it,s good enought i have been made it before.

wuzelee Guitar Fuzz Effect Friday, March 13, 2009 12:11:37 PM

what is the gain of these circuit? and what is the range of frequency it operates? or the Bandwidth..hope u answer my question.. i rili need it for my school project..

anonymous Guitar Fuzz Effect Saturday, February 28, 2009 12:48:48 AM

but this fuzz is very good sound made im impres couse i have been made it before.it,s any fizz circuit other?

Ryan Jones Guitar Fuzz Effect Tuesday, February 10, 2009 8:36:39 AM

I Just ordered all the parts for this online, and it came to Ł6.66, so you know it's gonna dound evil haha x

joegoy Guitar Fuzz Effect Sunday, February 01, 2009 7:52:10 PM

i built it and it's ok, it really have an effect.tnx a lot...

wilson479 Guitar Fuzz Effect Sunday, December 28, 2008 5:40:10 AM

I built it, its ok. Not the best sound. My next mod to the circuit will be to use two 1N4148 diodes in series for the feedback circuit. This will give a more "rounded" edge to the distortion and hopefully remove some of the "popping" experienced when using a high output Sheraton guitar.. BTW; you can use electronic simulation software such as Proteus - ISIS to simulate the circuit and monitor how it effects the waveform. This will answer questions such as "how can a variable resistor effect the signal" or "are the capacitor values critical".

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Annoying David	Guitar Fuzz Effect	Wednesday, October 28, 2009 11:46:39 AM
I'm fresh whit op-amps why does 9v go straight to ground by passing R1,R2 resistors?
anonymous	Guitar Fuzz Effect	Tuesday, August 04, 2009 5:28:02 PM
Hi, I'm building my own bass and I want to have a built-in fuzz effect. Would this circuit be any good for a bass or would i need to replace a few components with different values to get a more bass-suited sound?
mandrake	Guitar Fuzz Effect	Friday, July 17, 2009 10:02:22 AM
PFFF, is not work ! I've make this circuit... maybe is my fault. Is need an amplifier for electric guitar ? I have made this circuit and then e've connect the circuit to my guitar and to battery ( 9V) . Can anyone give me a schema with the connections to this circuit ? (maybe this is the problem)
vincent	Guitar Fuzz Effect	Tuesday, July 14, 2009 5:09:28 AM
thanks!the fuzz effect is very good but if i want to add foot switch,where i put it?
edi	Guitar Fuzz Effect	Sunday, March 29, 2009 11:15:08 PM
it,s good enought i have been made it before.
wuzelee	Guitar Fuzz Effect	Friday, March 13, 2009 12:11:37 PM
what is the gain of these circuit? and what is the range of frequency it operates? or the Bandwidth..hope u answer my question.. i rili need it for my school project..
anonymous	Guitar Fuzz Effect	Saturday, February 28, 2009 12:48:48 AM
but this fuzz is very good sound made im impres couse i have been made it before.it,s any fizz circuit other?
Ryan Jones	Guitar Fuzz Effect	Tuesday, February 10, 2009 8:36:39 AM
I Just ordered all the parts for this online, and it came to Ł6.66, so you know it's gonna dound evil haha x
joegoy	Guitar Fuzz Effect	Sunday, February 01, 2009 7:52:10 PM
i built it and it's ok, it really have an effect.tnx a lot...
wilson479	Guitar Fuzz Effect	Sunday, December 28, 2008 5:40:10 AM
I built it, its ok. Not the best sound. My next mod to the circuit will be to use two 1N4148 diodes in series for the feedback circuit. This will give a more "rounded" edge to the distortion and hopefully remove some of the "popping" experienced when using a high output Sheraton guitar.. BTW; you can use electronic simulation software such as Proteus - ISIS to simulate the circuit and monitor how it effects the waveform. This will answer questions such as "how can a variable resistor effect the signal" or "are the capacitor values critical".