Need help with guitar pedal

[SimplyThrilledHoney]

Hi!
I’m completely new to this, but I found a diagram from the 80s for a fuzz pedal and I figured this was a perfect opportunity to finally learn electronics. I just had a couple questions, which I’m sure are obvious, but I really appreciate any help. Most importantly, the pedal calls for a DPDT footswitch but I can’t seem to find where on the diagram it belongs. I’m also wonder what I need to do to change this from requiring a 9v battery to a 9v dc jack instead. Thanks for your help!!

 

[alec_t]

Welcome to ETO!
Your pic doesn't show the complete article. What's shown doesn't need a DPDT switch.
SW1 could be part of a standard 3.5mm switched jack socket as commonly used for plug-in earphones/headphones/ low-voltage supplies.

 

[Tony Stewart]

Center pole goes to next stage, each throw connects input or output to next stage. with a SPDT.

Ground is common but may be switched the same in case of a bad supply hum using a DPDT.

 

[Nigel Goodwin]

Center pole goes to next stage, each throw connects input or output to next stage. with a SPDT.

Ground is common but may be switched the same in case of a bad supply hum using a DPDT.

Normally a DPDT switch (or even TPDT) is used regardless.

Input to centre of one pole, output to centre of the other - join one side of the input switch to the input of the circuit, and the same side of the output switch to the output of the circuit. Connect the unused two contacts together.

This means the circuit is entirely disconnected (other than ground, which doesn't matter) when it's switched out.

It's basically similar to two way light switching

 

[rjenkinsgb]

This is a version of similar complexity, that shows the bypass switch.

https://www.schematicheaven.net/effects/ggg_colorsound_tonebender.pdf

 

[Nigel Goodwin]

This is a version of similar complexity, that shows the bypass switch.

https://www.schematicheaven.net/effects/ggg_colorsound_tonebender.pdf

Interesting variation, shorting the input to ground

 

[audioguru]

You do not learn much about looking at the schematic of an old FUZZ pedal. The FUZZ is distortion that is caused by errors in the circuit's design.

One pole of the switch selects the output. The FUZZ circuit or bypasses it.
The other pole of the switch probably turns the battery on or off.

 

[ZipZapOuch]

Fuzz pedal? Just poke some holes in your amp's speaker(s) with a screwdriver like Chuck Berry did.