Introduction: Easy Distortion/Overdrive Pedal

This is a very simple and very effective distortion pedal.

Step 1: Materials

-1, 9 volt battery

-1, 9 volt battery connector

-1, 4.7k ohm resistor

-1, 10k ohm potentiometer

-2, 1/4" audio jacks

-1, LM324 Quad op amp

-Various wires

All materials can be found at radio shack besides the LMN324 which I've only found online.

Step 2: Making the Circuit

Connect pin 3 of the LM324 to ground (pin 11) with your 4.7k ohm resistor. Connect the input jack to pin 2 and ground (pin 11). For your output, connect one wire to ground going to one leg of the jack. Then connect the jack to the left leg of the 10k ohm potentiometer to on the other leg of the jack with the right leg of the potentiometer connected to the center leg. Then connect the center leg to pin 1 on the LM324. Connect the positive wire(red) of the battery connector and connect the negative(black) to pin 11.

Step 3: Play

Plug in your instrument to the input jack and the amp into the output jack. Now if you play clean, it should sound distorted. Your done!

It may take a little bit of messing around to get it to work, but just make sure all of your connections are good and it should work fine. If there are any questions please ask.

Comments

author
Omnivent made it!(author)2015-03-29

As is (and with a new battery), the output is adjustable from 4V to 8V (pp) into a 10k load, which may easily destroy some amps, sound cards, or whatever you feed it into! Further, the output is load dependent.

See the attached for a better way of using the potentiometer. The 10k resistor can be tailored to let the potentiometer go from 0V to whatever you need.

The cap can be added for a warmer fuzz effect.

You can get by without the 4k7 on the non-inverting input, just connect it to ground.

Be sure to use the suffix-N version of the LM324, as eg. the suffix-P will behave very differently (same thing if using an LM358).

Perhaps try it out and if you like it, you're welcome to incorporate it in your circuit.

Fuzz.png
author
Sam+Vivian made it!(author)2015-03-30

Fair enough, all amps speakers etc. that I have used have been just fine but I suppose that's possible with a low voltage tolerating am, speaker etc.

author
Sam+Vivian made it!(author)2015-03-30

As far as the other suggestions go that would work better but I was just trying to make it as simple as possible

author
seamster made it!(author)2015-03-24

Sounds easy enough. Thanks!

author
Sam+Vivian made it!(author)2015-03-26

You're welcome

author
Ploopy made it!(author)2015-03-25

Cool!

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