If you want to add beeps, tones or alerts to your Raspberry Pi project, you require a Piezo Buzzer! This mini transducer is small but loud, and can be driven with a 1-20V peak-to-peak square wave. To use, connect one pin to ground (either one) and the other pin to a square wave out from a timer or microcontroller. For the loudest tones, stay around 4 KHz. For extra loudness, you can connect both pins to a microcontroller and swap which pin is high or low ('differential drive') for double the volume. This one plops perfectly into a breadboard and has short legs, so can also easily be mounted on a PCB! Please Note. This item is externally driven, e.g. requires a microcontroller to produce a tone. This Mini Piezo Transducer Features: * Mini 5V Piezo Transducer * PCB & Breadboard Mountable * Low Power Consumption * Sealed Base * Wave Solderable and Washable Technical Specification * Rated Voltage (Vp-p Square Wave) 5Vp-p * Operating Voltage 1 to 20Vp-p * Rated Current at Rated Voltage 1mA * Sound Output at 4000Hz at 10cm, at Rated Voltage ?80dB * Resonant Frequency 4000 ±500Hz * Operating Temperature -20 to +70°C * Storage Temperature -30 to +80°C * External Diameter: 13.8mm * External Height: 6.8mm * Capacitance: 0.013µF * Capacitance Max: 16.9nF * Weight: 1g * Model No.: ABT-402-RC https://elecena.pl/product/22717295/piezo-transducer-mini-5v-buzzer-4000hz 2023-03-07 https://elecena.pl/product/22717295/piezo-transducer-mini-5v-buzzer-4000hz 2023-12-27 https://elecena.pl/product/22717295/piezo-transducer-mini-5v-buzzer-4000hz 2024-09-19 https://elecena.pl/product/22717295/piezo-transducer-mini-5v-buzzer-4000hz 2024-11-29 https://elecena.pl/product/22717295/piezo-transducer-mini-5v-buzzer-4000hz 2024-11-30 https://elecena.pl/product/22717295/piezo-transducer-mini-5v-buzzer-4000hz 2025-11-28 https://elecena.pl/product/22717295/piezo-transducer-mini-5v-buzzer-4000hz 2025-11-29