{"product_id":"passive-buzzer-9042-piezo-element-for-pwm-tone-generation-5-pack","title":"Passive Buzzer — 9042 Piezo Element for PWM Tone Generation (5-Pack)","description":"\u003cp\u003eA genuine passive piezo buzzer (model 9042) with no internal driver circuit. Unlike the catalog's Active Buzzer Module — which plays one fixed tone as soon as it's driven high — this passive buzzer only makes sound when it's fed an oscillating signal, making it the right part for lessons that generate actual musical tones and melodies with \u003ccode\u003eledcWriteTone()\u003c\/code\u003e or similar PWM tone functions.\u003c\/p\u003e\u003ch3\u003eHighlights\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGenuine passive piezo element — no internal oscillator circuit\u003c\/li\u003e\n\u003cli\u003e16Ω impedance\u003c\/li\u003e\n\u003cli\u003eRated for 3V \/ 3.3V AC drive signal\u003c\/li\u003e\n\u003cli\u003eCompact 9 x 4.2mm size\u003c\/li\u003e\n\u003cli\u003eSold in a 5-piece pack\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Uses\u003c\/h3\u003e\u003cp\u003ePlaying actual notes\/melodies via PWM tone generation, alarms with variable pitch, and any lesson specifically teaching the difference between active (fixed-tone) and passive (frequency-driven) buzzers.\u003c\/p\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eWorks with any microcontroller PWM\/tone output (e.g. ESP32 \u003ccode\u003eledcWriteTone()\u003c\/code\u003e, Arduino \u003ccode\u003etone()\u003c\/code\u003e). Requires an oscillating signal to produce sound — driving it with a plain digital HIGH\/LOW like an active buzzer will not produce a tone.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cp\u003e5x 9042 passive piezo buzzers.\u003c\/p\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eThis is a passive buzzer, not the catalog's Active Buzzer Module — the two are not interchangeable for a fixed-tone circuit driven by a simple digital write. Use a PWM\/tone function to drive this part.\u003c\/p\u003e","brand":"Generic","offers":[{"title":"Default Title","offer_id":52966872416568,"sku":"TML-COMP-PASSIVE-BUZZER-9042-01","price":63.0,"currency_code":"THB","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1012\/8716\/6264\/files\/passive-buzzer-9042-spec-callout_358692e3-96d9-4396-adce-71dc72ee0cc3.png?v=1789549620","url":"https:\/\/nexusmicrolabs.com\/en\/products\/passive-buzzer-9042-piezo-element-for-pwm-tone-generation-5-pack","provider":"Nexus Micro Labs","version":"1.0","type":"link"}