Introduction: How to Make an Automatic Night Light
Automatic night light is a device with turns on light when there is darkness in the surrounding.
Its a portable version of automatic street lights. In this I used LDR (Light Dependent Resistor) which varies resistance with respect to light intensity.
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Now I am going to instruct how to make an Automatic Night Light with less number of components.
Step 1: Components Required
Step 2: Circuting
Place all components on PCB according to Circuit given above.
Note: adding a resistor of 330 ohms in series with led improves the lifetime of led.
Now solder all components.
Now solder 9V battery snap at respective terminals.
Place a piece of double sided tape on snap and stick the pcb to it.
Now connect battery to it.
For simulation fritzing file is attached
Step 3: Circuit Construction and Testing
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How can i do if i want that to operate much Watt. I want too much Watt the output .
You must use relay.
importance of automatic night light?