Probably broken LM393 sound detection sensor

[satechi]

Hello.

Beginner here. Tested with Arduino UNO (ch340).
I have probably broke LM393 sound detection sensor. It looks like here on ebay
Below mentioned red diode is on that sensor which indicates signal output.
Symptoms: red diode under 90% potentiometer level is all time ON. Above 90% it works (I think) correctly. When no sound then diode doesn't light, when there is sound diode lights. I have prepared video: https://www.youtube.com/watch?v=SUOLUGBEBSw
My question: Is that sensor broken? While checking I have probably shortened VCC and DO in that sensor.

About circuit: 5V from Arduino to 5V sensor output, GND Arduino to GND sensor output, sensor digital output connected to 7th digital pin.Looks like below:

It would be my first broken sensor ;'D

[Idahowalker]

Have you set the sensor to just turn the led off and yelled at the mic? When you did, did the red light come on for a short bit?

[gilshultz]

I think what you are trying is to measure the sound intensity, this is not designed to do that. The pot will set the threshold for the sound level trip. If this is the correct schematic you have it working properly, the output is either high or low. Connect it to the analog input and load the voltmeter sketch, it should show about 5V and 0V, not a range in between. You may get some oscillation at the trip point as there is no feedback. Have Fun!