Door Knocker/Thumper/Banger powered by Wiper Motor - Halloween Scare
thingiverse
**02/02/2019 Added information for control circuit** If you end up making this project, I'd love to see a picture 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! <b>Video for control circuit:</b> 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 <b>Parts List for Knocker Mechanism:</b> 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 <b>Parts List for Circuit:</b> 1x 12v Relay 1x 1N4148 Diode 1x 2N2222A Transistor 1x 1k ohm Resistor 1x HC-SR501 or HC-SR505 PIR Module 1x Prototyping board 1x Set of connectors More details for parts in video.
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