{"product_id":"10pcs-high-decibel-passive-buzzer-3040-piezoelectric-alarm-speaker-with-wire-for-arduino-diy-electronic-projects","title":"10-Pack 3040 Passive Piezoelectric Buzzers, 4 kHz, Pre-Wired","description":"\u003cp\u003eA passive buzzer stays silent until the board feeds it a signal, which is why it suits builds where the tone comes from code. These 3040 piezo buzzers take 1 V to 30 V, run at 4 kHz and arrive pre-wired on a 60 mm lead. Ten in a pack cover spares.\u003c\/p\u003e\u003ch2\u003eThe Tone Comes From Your Code, Not the Buzzer\u003c\/h2\u003e\u003cp style=\"margin:0 0 6px 0\"\u003e✅ \u003cstrong\u003eTen in the pack\u003c\/strong\u003e Ten units cover a build, a spare and the second board you will want later.\u003c\/p\u003e\u003cp style=\"margin:0 0 6px 0\"\u003e✅ \u003cstrong\u003eTone set by the signal\u003c\/strong\u003e A passive element takes its pitch from the signal you feed in, so the sketch decides.\u003c\/p\u003e\u003cp style=\"margin:0 0 6px 0\"\u003e✅ \u003cstrong\u003eVoltage range\u003c\/strong\u003e A 1 V to 30 V range covers 3.3 V and 5 V logic boards and 12 V projects.\u003c\/p\u003e\u003cp style=\"margin:0 0 6px 0\"\u003e✅ \u003cstrong\u003eLead already fitted\u003c\/strong\u003e A 60 mm wire means the buzzer can sit behind a panel without extra soldering.\u003c\/p\u003e\u003cp style=\"margin:0 0 6px 0\"\u003e✅ \u003cstrong\u003eSmall footprint\u003c\/strong\u003e At 39.5 mm across and 4 mm deep it fits a compact prototype case.\u003c\/p\u003e\u003cp\u003ePassive is the detail that catches people out. An active buzzer sounds as soon as it sees DC; this one needs an alternating drive signal around its 4 kHz operating frequency and stays quiet on a steady supply. Plan a driver pin or a transistor, not just a rail.\u003c\/p\u003e\u003cp\u003eThe obvious build is an alarm or a kitchen timer. Mount the buzzer behind a drilled hole, run the 60 mm lead back to the board and let the firmware decide the pattern: short beeps for a warning, a continuous tone for a fault.\u003c\/p\u003e\u003cp\u003eThe working range of -20 °C to 60 °C covers indoor builds and a sheltered workshop. Inside a sunlit outdoor enclosure the air gets hotter than the outside temperature, so keep the buzzer away from the lid and out of direct sun.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTechnical details\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eModel: 3040\u003c\/li\u003e\n\u003cli\u003eType: Passive piezoelectric buzzer\u003c\/li\u003e\n\u003cli\u003ePack quantity: 10 pieces\u003c\/li\u003e\n\u003cli\u003eDiameter: 39.5 mm\u003c\/li\u003e\n\u003cli\u003eDepth: 4.0 mm\u003c\/li\u003e\n\u003cli\u003eLead length: 60 mm\u003c\/li\u003e\n\u003cli\u003eOperating voltage: 1 V to 30 V\u003c\/li\u003e\n\u003cli\u003eOperating frequency: 4000 Hz\u003c\/li\u003e\n\u003cli\u003eOperating temperature: -20 °C to +60 °C\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S1aff8a7f13424a99876948f6a17a9ca5P.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sa7f367c54df0407aa0eb63bae4675597a.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S5e57c401b7aa40e281566673d4b5a202N.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\u003cp\u003eCheck that your driver pin can deliver a 4 kHz signal, then keep the pack of ten.\u003c\/p\u003e\u003cp\u003eSee more: \u003ca href=\"https:\/\/spy-shop.com\/collections\/audio-devices\"\u003eexplore more audio devices\u003c\/a\u003e\u003c\/p\u003e","brand":"Spy-shop.com","offers":[{"title":"Default Title","offer_id":64124016492874,"sku":"1005011887229978-Default Title","price":23.66,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/5980\/2954\/files\/S1aff8a7f13424a99876948f6a17a9ca5P.webp?v=1793145684","url":"https:\/\/spy-shop.com\/no\/products\/10pcs-high-decibel-passive-buzzer-3040-piezoelectric-alarm-speaker-with-wire-for-arduino-diy-electronic-projects","provider":"Spy-shop.com","version":"1.0","type":"link"}