How to make a simple police whistle at home

How to make a simple police whistle at home

his video, I will guide you how to make siren Plice police for motorcycles with simple materials at home.

Prepare:
12VDC motor
Gear (Optional)
Tongue stick
Candle glue + 502 glue
soft drink cans + plastic cards
Shelled yogurt box
18650 3.7V battery x2
Include some tools outlined in the video.

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