MIN PROJECT ONI

AUTOMATIC HEAD LIGHT BRIGHTNESS SWITCH

ByHEMANTH

KOTU.SAI KUMARA.SUMANTH

VENKAT REDDY

BATCH NO -11

Project guideBALAJI sir

INTRODUCTIONDriving the highway with your high-beam

headlights can really increase your visibility, but can be a blinding hazard for other drivers. This simple circuit can be wired into your headlight switch to provide automatic switching between high and low beam headlights when there is oncoming traffic. It does this by sensing the lights of that traffic. In this way, you can drive safely with your high-beams on without blinding other drivers.

CIRCUIT DIAGRAM

CIRCUIT ON BREAD BOARD

TOP VIEW

COMPONENTS5K 1/4W Resistor5K PotNPN Phototransistor2N3906 PNP TransistorLow Current 12V SPST RelayHigh Current 12V SPDT RelaySPST SwitchCar BatteryCase, wire, board, knobs for pots

WORKINGAutomatic headlight brightness switch

switches the headlight from high beam to low beam when light from oncoming vehicle strikes the phototransistor of the vehicle. It holds the lights on the upper beam until the vehicle approaches from the other direction. Also the moment the car passes by,it shifts automatically the headlight back to upper beam.

High current 12vSPDT relay

Single pole, double throw relay that provides the switching of the headlight beam.

SPST(single pole single throw)switch

One-way switch.

A simple on-off switch: The two terminals are either connected together or disconnected from each other. An example is a light switch

ADVANTAGES MAINLY USEFUL IN THE HIGHWAYS

PREVENTS ACCIDENTS

DISADVANTAGES

When we drive the vehicle fitted with automatic dippers on a road in which different types of vehicles and hence varying light intensities cause frequent flickering of Headlight

This is only useful on highways and straight width roads

CONCLUSION The Auto dipper can perform a great deal in

reducing the manual efforts and fatigue of drivers in dipping the headlamp frequently while driving through highway full of moving vehicles.

Newer and better technologies always come with time and it will help in reducing the manual labour and difficulties in the sector where it is made use. In short it is a device with bright future

THANK YOU