An active 5v alarm buzzer is an audio signalling device that can be electrical, mechanical, electro-mechanical, or piezoelectric compatible with Arduino. An active buzzer generates an audio signal with an internal oscillator. It is high quality and highly durable DC electronic device. Compared to a passive alarm buzzer, it is quite easy to control but a bit expensive. A low-level trigger active buzzer can produce different sounds because of frequency I/O toggling. This buzzer module rings out as long as it is electrified. An active buzzer alarm operates at 3.3v to 5v, as a result, can be directly connected with 3.3v and 5v microcontrollers.
A slightly larger current is needed to make a buzzer beep. However, the output current of Arduino GPIO is too low, so we need a transistor to help. S8550 transistor driver is used for driving the module. S8550 low voltage high current transistor designed for class-B push-pull audio amplifiers. Easy installation of module achieved by fixing into the bolt hole. When the input-output port input shows a low level, the buzzer sounds. An active buzzer widely used in computers, printers, photocopiers, alarms, electronic toys, automotive electronic equipment, telephones, timers, and other electronic products for voice device
Pins Description:
- VCC External 3.3V-5V voltage
- GND External GND
- I/O external microcontroller IO port
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