Door Knocker/Thumper/Banger powered by Wiper Motor - Halloween Scare

**02/02/2019 Added information for control circuit

**If you end up making this project, I would love to see a pic in the 'Post a Make' section! :-)

Homemade Door knocker/thumper/banger using rubber mallet, some 3D printed parts, wood, and a wiper motor. For Halloween Scare!

Video for control circuit:
https://youtu.be/YMU_4FIxcbk

Link to UPGRADE models: https://www.thingiverse.com/thing:3102798
UPGRADE video: https://youtu.be/prDvl66kK8A

https://youtu.be/lFoxJc9jLHI

Parts List for Knocker Mechanism:
One Rubber Mallet
One 5/16" x 2.5" smooth screw with thread
One 1/4" x 2" smooth screw with thread
One 5/16" Nylon Lock Nut
One 1/4" Nylon Lock Nut
Four 5/16" Washers
Four 1/4" Washers
3D Printed Parts

Parts List for Circuit:
1x 12v Relay
1x 1N4148 Diode
1x 2N2222A Transistor
1x 1k ohm Resistor
1x HC-SR501 or HC-SR505 PIR Mdule
1x Prototyping board
1x Set of connectors