Pixhawk4 buzzer flows mV not 5V

Pixhawk
1

I am trying to use a separate RTK GPS rather than the GPS provided by Pixhawk4.
Pixhawk4 uses the drone’s buzzer and switch for the GPS terminal. I connected the GPS pins, the switch pin, and the buzzer pin as shown in the figure below, and the GPS was connected well.

캡처.PNG
캡처.PNG2223×1222 392 KB

But the buzzer and switch don’t work. The pinout of Pixhawk4 says 5V flows to the + pin of the buzzer, but it was confirmed that 0.1~0.2V was flowing when actually measured.
I was expecting 5V to flow just by connecting it, but I’m disappointed it doesn’t. Why doesn’t 5V flow? What additional work do I need to do?

2

Hi, faced the same problem recently. I put a non-standard GPS plugged in and my speaker was quiet. I checked all the outputs and noticed an error in the circuit in the user manual. I have solved the given problem. Any passive buzzer with a resistance of about 16 ohms is required. We connect it between the 9 outputs (buzzer -) and the + 5V positive output and everything works.