AUTOMATIC NIGHT LAMP

by ANANTHA KRISHNAN J in Circuits > Electronics

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AUTOMATIC NIGHT LAMP

FINAL copy.jpg

Hi ,

In this project i am going to make an automated night lamp model using basic electronic parts which runs on a 9v battery.It works on the lethargy of light falling on the LDR(light dependent resistor).When there is no light the LED will glow at it's maximum and the brightness of LED decreases with the decreasing surrounding luminosity of light.

THING YOU'LL NEED

BC 507.jpg
10K.jpg
mini led lights.jpg
battery.JPG
00792-1-L.jpg
2pcs-aa-cells-battery-3v-clip-holder-box.jpg
cbe9caa5_30f3f563_cba5_4ac0_86fe_31dc5dae5187.jpg
CDS-Photoresistor-LDR.jpg

1.BC 507 TRANSISTOR

2.10K POTENTIOMETER

3.9V BATTERY

4.AN LED

5.RELAY

6.1 K RESISTOR

7.LIGHT DEPENDENT RESISTOR

8.SWITCH(OPTIONAL)

DESIGNING THE MODEL

LDR.jpg
FINAL copy.jpg

The Night lamp circuit model is given above. Here the potentiometer can be adjusted to control the sensitivity of the LDR.

This circuit can be used to make portable table lamp as shown above(USING ALTOIDS)

NB: I used a 3v button cell to light up the LED to fit inside the ALTOIDS