# Active Buzzer Module with LED, for PixHawk PX4, alarm, 3.3V

> Active buzzer module with red LED for PixHawk PX4, used as an alarm for low battery, failsafe or signal loss. Powered at 3.3V, includes a button for manual shutdown, connects via the Buzzer and Switch interfaces. Dimensions 15 x 38mm, weight 7g. Helps locate the drone after an uncontrolled landing. Reference 88050.

- Page: https://sigmanortec.ro/en/active-buzzer-module-with-led-for-pixhawk-px4-alarm-33v
- Price: 29.43 RON
- Availability: In stock; 1-2 zile
- Reference: 88050 · EAN: 5946683990533
- Category: Mechatronics and IoT > Sensors and Modules > Audio and Sound > Buzzers and Alarms
- Specifications: Input Voltage: 3.3 V
- Package (shipping data): 0.01 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 06:34 (Europe/Bucharest)

## Description

The alarm module for Pixhawk PX4 with active buzzer and red LED, provides a loud audible warning and visual signal for low battery, failsafe or signal loss, helping to quickly locate the drone after an uncontrolled landing. It is powered by 3.3V, has a manual stop button, is compact and lightweight, and connects easily through the Buzzer and Switch interfaces.
Active buzzer for PixHawk, is an accessory designed specifically for FPV drones as an alarm module, designed to be compatible with the Pixhawk PX4 flight controller.
This module emits a clear and loud sound signal, alerting the pilot of critical situations such as low battery or loss of signal. The sound signal is also accompanied by a Red LED visual indicator present on the button. The sound and light signal is very useful especially in the event of an uncontrolled landing, significantly reducing the risk of permanently losing the drone and allowing for easier finding.
The button on the board allows the buzzer to be manually deactivated when not needed or when the aircraft has been found.
Specifications:
Supply voltage: 3.3V
Functions: Active buzzer, visual indicator
Compatibility: Pixhawk PX4
Dimensions: 15 x 38mm
Weight: 7g
Pinout:
Pine
Marking on the module
Function
Description
1
B+
Buzzer power supply (+5 V)
Positive input for buzzer (supply voltage)
2
B-
Buzzer signal (control)
The signal pin sent from the flight controller to activate the buzzer
3
–
GND
Common ground for the module
4
D
LED signal (visual indicator)
Controls the warning LED or indicator light
5
3.3
LED/logic power supply
Logic power supply for LED and button circuit (3.3 V from Pixhawk)
Use:
Use the connector included in the package to connect the module to the control board, using the Buzzer and Switch interfaces.