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

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

This is an Excellent Upgrade for the Homemade Door knocker/thumper/banger using rubber mallet.

Shorter Video: https://youtu.be/prDvl66kK8A

More Detailed Video: https://youtu.be/SPWecX9bd8c

If you missed the first video, check out the link below.

https://youtu.be/lFoxJc9jLHI

For Halloween Scare!

3D Printed Parts

3D Model Files: https://www.thingiverse.com/thing:3091944

Video for control circuit: https://youtu.be/YMU_4FI