Active Buzzer Module, 3.3V-5V 9012 Transistor Driven 3 Wire System

Active Buzzer Module, 3.3V-5V 9012 Transistor Driven 3 Wire System

• Built-in Oscillator: Active buzzer alarms immediately when powered. No PWM required, simpler program control than passive beepers. Great for DIY timing alarms.
• 9012 Transistor Drive: Strong stable sound output. Module interface is 3 wire system. Working Voltage: 3.3V-5V, compatible with 5V and 3.3V microcontrollers.
• Easy Fixing Design: Comes with mounting holes for secure bolt installation. Size: 3.8*1.3cm/1.5*0.5in. Lightweight 4g per module, compact for embedded projects.
• Broad Application: Ideal for electronic toys, alarming devices, timers, and learning kits. Perfect for makers and educators seeking reliable sound alerts.
• 5-Pack Value: Includes 5pcs active alarm modules. Enough quantity for prototyping, replacements, or classroom STEM activities.