ScienceOnline | Shadow Detector @ScienceOnline | Uploaded November 2014 | Updated October 2024, 1 hour ago.
An Electronics Project
This video explains how to create an alarm that is activated when something or some one, blocks a beam of light - a simple security alarm. With the addition of a relay, this circuit can be modified to control lights, motors or other high current devices.
An Electronics Project
This video explains how to create an alarm that is activated when something or some one, blocks a beam of light - a simple security alarm. With the addition of a relay, this circuit can be modified to control lights, motors or other high current devices.
