StompBox (Kick Drum)

🦶 Passive Piezo Kick Stomp BoxA simple 3D-printed stomp box that turns your foot taps into a kick-drum sound when plugged into a PA, amp, or mixer.It uses a piezo disc transducer and a small passive shaping circuit to clip and filter the signal for a warm, percussive “thump.”No power required — just plug it in and stomp!⚙️ Bill of Materials (BOM)RefQtyValue / CodeDescriptionNotesC11153 (15 nF)Film capacitorClipping stage smoothing capacitor (across diodes)C21104 (100 nF / 0.1 µF)Film capacitorHigh-pass filter capacitor (~160 Hz cutoff)C31473 (47 nF / 0.047 µF)Film capacitorLow-pass filter capacitor (~3 kHz cutoff)D1, D221N4148 / 1N34ADiodesBack-to-back clipping diodes to groundR114.7 kΩResistorSeries resistor from piezo signal to clipping nodeJ1–J3, J54XH2.54 2-pin connectorsJST-XH B2B-XH-A (2.50 mm pitch)For piezo, HPF, LPF, and output connectionsJ41XH2.54 3-pin connectorJST-XH B3B-XH-A (2.50 mm pitch)For volume potentiometer connectionPiezo Disc1–27 mm piezoelectric transducerSignal