Active Buzzer - Nauvitel Electronics : Just plug in
Buy Active buzzer with generator 5V 12mm - THT Botland - Robotic Shop
22pf capacitor ceramic pack of 10
10PCS New Ultra-thin 3V 5V Active Buzzer Alarm AC 9MM*4.2MM 9x4.2MM 9042 MINI Active Piezo Buzzers Fit For Arduino Diy Electro - AliExpress
Buy ROHS Compliant Buzzer Active 85dB@3V with Magnetic Plugin - SB Components – SB Components Ltd
50K potentiometer
Buy Active buzzer with generator 5V 12mm - THT Botland - Robotic Shop
How to Use Buzzers (Active and Passive) with an Arduino (Lesson #20)
BC547 BJT transistor - Nauvitel Electronics : Just plug in
Keyestudio RJ11 EASY-plug Active Buzzer Module for Arduino STEAM
Buy Active buzzer with generator 5V 12mm - THT Botland - Robotic Shop