Automatic Night Light Circuit

Are you bored off on using the same color night lamps?

Nightlights are useful to show the general layout of a room without turning on a major light, for avoiding tripping over stairs or obstacles, or to mark an emergency exit. Here is a simple multi-color night light circuit which holds five different colors. The different colors applied in this circuit are white, red, green, yellow & blue. It glows in a particular color as per your choice. It has a digital switch to select a particular color. Above all it consumes low power.

Multi-color night light circuit

Three Leds of the same color are connected in series and are connected to 5 different outputs of johnson decade counter ic CD4017.

$ A momemtary switch is provided to choose a single color of our choice.

$ The circuit uses LDR to sense the light and will turn ON automatically when the bedroom light is switched OFF.

$ The brightness of the light can be controlled by a potentiometer.

$ Power consumption of this circuit is very low.

$ The circuit is powered by an external regulated 12V adaptor or by an inbuilt power supply.



You will need:

IC2 555 - 1 no.
IC1 CD4017 - 1no.
Resistor(1/4Watts)
R1 - 10M
R2 - 220E
R3 - 10K
R4 - 33K
R5 - 10K(Pot)
R6 - 1K
Capacitor(Disc)
C1 - 0.1uF
C2 - 0.01uF
Switch
ON/OFF - 1no.
Momentary (Switch to on) - 1 no.
LED(Water Clear-5mm)
Red - 3no.
Green - 3nos.
Yellow - 3nos.
Blue - 3nos.
White - 3nos.
LED(RED) - 1no.