diy pedal

Want to play different pedal sequences in a flash? These handy boxes provide more tone solutions than you might realize.

There is no right or wrong way to wire a pedalboard. It’s really a matter of personal taste and what our ears find pleasing. Every musician has their own thing, and our pedalboards are certainly an extension of that. For some, reconfiguring the pedalboard is a lifelong process, and adding a new device often means something has got to go, because real estate is crucial!

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Note the two trimmer screwdriver slots, surrounded by blue, in the middle of this phase shifter.

Aisha Loe explains how to cure mushy modulation with a screwdriver—but you need to know what you’re doing.

Potentiometers are used for most of the controls on pedals and a lot of other electronic equipment as well. A potentiometer (also known as a pot) is defined as a 3-terminal variable resistor in which the resistance is manually varied to control the flow of electrical current. A potentiometer acts as an adjustable voltage divider. Any control on a guitar pedal that has a knob will typically be controlling a potentiometer, or sometimes a rotary switch.

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Fig. 1

Yes, there's a lot of value variance, but there's an upside, too.

In your guitar pedal dealings, you may have heard the phrase “component tolerances.” Nearly every component in a pedal is marked with a value, and ideally every component in your pedal would be that exact value, not one bit more and not one bit less. So, every 1k-ohm resistor would be exactly 1.0000000000000k ohm and every 10 µF capacitor would be exactly 10.0000000000000 µF. In this supernatural circuit situation, every pedal would sound identical. There would be no deviations from each component’s intended value, and there would be no deviations from the effect’s intended sound (all other things being equal). Unfortunately, we cannot hope to achieve this sort of metric perfection in the real world. While perfection may not ever be attained, it is also not often required, and all the circuits we interact with day in and day out can tolerate some sort of variation in their components’ value.

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