Automatic Night Light

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Introduction: Automatic Night Light

Automatic night light control system needs no manual operation for switching ON and OFF when there is need of light. It detects itself whether there is need for light or not. When darkness rises to a certain value then automatically light is switched ON and when there is other source of light i.e. day time, the light gets OFF.

Wastage of power is not desirable in any system. So it is very much economic to have this arrangement so that power is not wasted during day time where manual operation is not possible. Though we can use it in our daily life also for the betterment of our system.

While dealing with this project we faced a problem that the light remained on or off depending upon the presence of any other light source. If we want to make the light off in night hours when there is no need of light, or after switching off the light if we want to make the light on again it was not possible with the circuit investigated earlier. As we don’t want any manual operation we have an arrangement of doing this by means of sound (like clapping sound).This mechanism makes the circuit is more flexible.

Step 1: SIMPLE Automatic Night Light IN

Automatic night light control system needs no manual operation for switching ON and OFF when there is need of light. It detects itself whether there is need for light or not. When darkness rises to a certain value then automatically light is switched ON and when there is other source of light i.e. day time, the light gets OFF.

In the project we use light detecting resistor as a light sensor

Wastage of power is not desirable in any system. So it is very much economic to have this arrangement so that power is not wasted during day time where manual operation is not possible. Though we can use it in our daily life also for the betterment of our system.

The figure above shows that when the torch is turned on, the resistance of the LDR falls,allowing current to pass through it.
When a light level of 1000 lux (bright light) is directed towards it, the resistance is 400 (ohms). When a light level of 10 lux (very low light level) is directed towards it, the resistance has risen dramatically to 10.43M (10430000 ohms).

Step 3: Things Required

1) 555 timer I C

2) Photo detector(L D R)

3)1000 ohms resistor

4)500 ohms resistor

5)LED 6)On/Of Switch

7) 9 v Battery Holder

8) 9 v Battery Holder

9) PCB BOARD or Acrylic Sheet

Step 4: Making It

It not that complex circuit. This Project is enable kids to think upon what material are used in the street lights.

If you are your are using PCB board it will be better. Since PCB Boards are not available, I have use this board to make it.

Led can be less than 5 v and more than 2 V.

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