Mask remove detector

Here's a youtube tutorial on this project        you can watch it of you don't understand it.

Step 1: solder buzzer

Step 2: solder battery cap

Step 3: attach battery.

You can attach the battery with the help of double tape.

Step 4: stick on your shirt

I have used double tape to stick on my t shirt.

Now it's ready to use.

After you make it you can stick on your shirt and it's ready to use.

Here's a demo on this project.