Mounted on a door, this device senses knocking sounds and knocks back the same way. You can use it as a prank or a spooky effect. It is a simple circuit with an Arduino, an electret microphone module, and a servo motor. Check out what others are saying about the Ghost Knocker project build!
Please note: Due to inventory packaging methods, you may receive extra components for some products.
You Will Need
- Arduino mini programmer
- A knocker hammer parts (small wooden ball toy)
- A flexible metal wire (for connecting the servo horn and the knocker hammer)
- Double stick tape (bonding parts and mounting the device on floor)
|2157765||ARDUINO PRO MINI|
|2159445||ANALOG SOUND SENSOR|
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