Super Simple Flashing Light Doorbell Demo
This is a very simple and cheap, audible and visualizable doorbell system that can be made for under $10. Sometimes, when I'm working with power tools or just listening to loud music, I cannot hear the doorbell ring. I need a visual cue to tell me if someone is waiting at door, so I made a doorbell ...By: TechMartian
Continue Reading »
from Instructables: exploring - featured http://ift.tt/2ujXIUA
via IFTTT