How to Make Automatic Light for Your Room


Does it happen to you that you walk into the washroom sleepy-head at night and walk out without noticing whether you have switched the light off? Well, it may not matter to you a lot but when the world is switching to conservation of energy; it’s about time that you could add little smarts to your electricity usage.

How about if you enter a room and leave without even worrying about it and it gets automatically switched on and off! Wouldn’t it be awesome if you could make one on your own and surprise your folks? The right digital electronics video tutorials can show you how!

Functions of Automatic Light

It’s no magic it’s just a ‘reed’ switch that senses when you open and close your door. It’s a relay-thing in its function of passing on electricity. But a typical relay runs with application of coil voltage. But reed switch begin to act when it can trace magnetic field in close proximity. You can use a reed switch that closes in general state but opens when you put a magnetic field anywhere near it.

Learn how to light up your room automatically through Digital Electronics Video Tutorials. You have to attach the circuit to the room’s door where the light is placed. There is a magnet stuck to the door such a manner that it routinely comes near the ‘reed switch’ when you close the door. It acts like a simple Boolean Math. When you open the door the relay is on. Light switches ‘on’. Subsequently, the circuit is off when you close it resulting in light ‘off’.

Components of Automatic Light


Chief elements in a self-controlled LED are—2xIR sensor module, Crystal (11 MHz), voltage regulator 7805, 8051 microcontroller and a relay-based light LED

So, how do they work on your circuit? online digital electronics video tutorials let you learn to deal with IR–the sensor called “Infrared Rays” can detect infrared waves. Here the IR transmits signals and a photodiode receive signals. You could make use of pins that offer TTL value on the basis of voltage. A potentiometer can adjust the circuit according to the varying accuracy and range.

The module must provide a high signal almost +5V when the reference voltage is lower than the generated voltage. And it should emit as low as 0V, when the voltage generated is lower than the voltage referred.


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s