I made a test circuit prior to building a DIY pedal to activate functions in a "TC Helicon Play Acoustic" acoustic guitar effects and vocal harmonizer pedal that I own. The circuit includes 3 momentary contact, normally open tactile switches, an L3WEGW LED (light emitting diode), some wire, and a Switchcraft TRS (tip, ring, sleeve) … Continue reading DIY – TC Helicon Switch 3 for Play Acoustic – circuit build – function test →