It is a Automatic Street light controller. It automatically switches ON and OFF lights during the day and night time.
Components Used |
||
|---|---|---|
| LDR -Photocell Photoresistor LDR -Photocell, Photoresistor |
X 1 | |
| LED 5mm LED 5mm |
X 1 | |
| GPCB PCBs & Breadboards PadBoard-3U 2 sided with plated holes |
X 1 | |
| Resistor 470 Ohms Metal Film Resistors - Through Hole 470 OHM 1/4W 1% |
X 1 | |
| 9V Battery Consumer Battery & Photo Battery 9V RECTANGLE |
X 1 | |
| Potentiometer 10Kohms Potentiometers 10Kohms 10% 12.5mm Cermet Element |
X 1 | |
| BC547 TRANSISTORS BC547 TRANSISTORS |
X 1 | |
It is a simple and powerful concept, which uses BC 547 NPN transistor as a switch to switch ON and OFF the street light system automatically.
It automatically switches ON lights when the sunlight goes below the visible region of our eyes. (Eg: in the evening after Sunset).
It automatically switches OFF lights when sunlight falls on it (i.e on LDR) (Eg: in the morning, by using a sensor called LDR(Light Dependent Resistor) which senses the light just like our eyes.
.jpg)
