• Bird Lau

Difference Between Battery And Power Supply | The Pedal Diary



Three elements should pay attention before getting start

Voltage, Current, and Polarity


Voltage (V)

You need to know what’s the voltage that the pedal requires (9V? 12V? 18V? or 24V?)


Current

Current is measured in Amps (A), most of guitar pedals draw 100mA (milliamps)

Make sure the power supply has enough current


Polarity

Make sure the positive and negative connections is correct


9V Battery

-Portable power source

-Need to worry about the battery life

-Carbon battery good for analog pedals such as Wah, Fuzz, Distortion, Overdrive

External Power Supply

-Isolated Power

-Fulfill different power requirements (9V, 12V, 18V)

-Don’t need to worry about the battery Life

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