Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 501 views

    Automatic Headlight Dim Bright

    Uploaded by

    Praveen Krishna
    This document describes a simple circuit that can automatically switch a vehicle's headlights between high beam and low beam depending on whether oncoming traffic is detected. The circuit uses a phototransistor to sense incoming light and triggers a relay to change the headlight setting. When no other vehicles are detected, the headlights remain on high beam, but switch to low beam when oncoming headlights are sensed to avoid blinding other drivers. This automatic switching allows for safer night driving with high beams on highways.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    Automatic Headlight Dim Bright

    Uploaded by

    Praveen Krishna
    501 views14 pages
    This document describes a simple circuit that can automatically switch a vehicle's headlights between high beam and low beam depending on whether oncoming traffic is detected. The circuit uses a phototransistor to sense incoming light and triggers a relay to change the headlight setting. When no other vehicles are detected, the headlights remain on high beam, but switch to low beam when oncoming headlights are sensed to avoid blinding other drivers. This automatic switching allows for safer night driving with high beams on highways.

    Original Description:

    Automatic Headlight Dim Bright Ppt

    Original Title

    Automatic Headlight Dim Bright Ppt

    Copyright

    © © All Rights Reserved

    Available Formats

    PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    This document describes a simple circuit that can automatically switch a vehicle's headlights between high beam and low beam depending on whether oncoming traffic is detected. The circuit uses a phototransistor to sense incoming light and triggers a relay to change the headlight setting. When no other vehicles are detected, the headlights remain on high beam, but switch to low beam when oncoming headlights are sensed to avoid blinding other drivers. This automatic switching allows for safer night driving with high beams on highways.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    501 views14 pages

    Automatic Headlight Dim Bright

    Uploaded by

    Praveen Krishna
    This document describes a simple circuit that can automatically switch a vehicle's headlights between high beam and low beam depending on whether oncoming traffic is detected. The circuit uses a phototransistor to sense incoming light and triggers a relay to change the headlight setting. When no other vehicles are detected, the headlights remain on high beam, but switch to low beam when oncoming headlights are sensed to avoid blinding other drivers. This automatic switching allows for safer night driving with high beams on highways.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 14

    INTRODUCTION

     Driving 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
    COMPONENTS
     5K 1/4W Resistor
     5K Pot
     NPN Phototransistor
     2N3906 PNP Transistor
     Low Current 12V SPST Relay
     High Current 12V SPDT Relay
     SPST Switch
     Car Battery
     Case, wire, board, knobs for pots
    WORKING
     Automatic 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

    You might also like