Dropping Spider on Doorbell - Halloween Scare Prank

This Halloween my son Max, came up with the idea to drop a spider on anyone who tries to ring our doorbell... I immediately jumped on the idea and we started to work on it. Using a simple ultrasonic distance sensor (HC-SR04) and a servo connected to an arduino we made this project in about an hour. ...
By: sourcery

Continue Reading »

from Instructables: exploring - featured https://ift.tt/2F0A3yj
via IFTTT