SparkFun Proto Pedal Analog Equalizer By SparkFun Electronics · Example build · 9 views · 0 remixes A two-band analog EQ guitar pedal using gyrator filters, built on the SparkFun Proto Pedal prototyping board 0SaveRemixCopy link Estimated parts costNo price seen yetDifficultyModerateParts1 part · 1 pcs Start the assembly guide →