Automatic dimmer dipper circuit for automobiles is a simple and small device used in vehicles and it changes the headlight brightness automatically when another vehicle comes from the front.
Furthermore, because too much light can make other driver blind at night and also this can make an accident.
So main purpose of this circuit is to make driving more safe.
As a result, when no vehicle come from front, circuit changes high beam back to low beam and it does this automatic after it sees other car light.
Hence, this device help make driving more easy and safe and also helps driver not to feel sleepy.
WARNING: Making car circuit is not safe, do this only when an adult or mechanic fixes it in car.
What is a Automatic Dimmer Dipper for Automobiles:
Car headlight control is also called dipper or dimmer and it has two settings which we can choose.
High beam is very bright and helps for night seeing and we use low beam for normal driving so it does not blind other drivers.
Even if name say “automatic dimmer dipper” it not always it changes light by itself, but in many new car have smart system but when it see other car light it changes high beam to low beam automatic.
Also, we call this system automatic high beam control or a similar name.
Why Automatic Headlamp Dimmer Dipper is Important:
At night driving is hard because bright light from other car make problem for eyes.
Manual dipper switch is not easy because driver needs to use it again and again which is very hard when there is stress or traffic.
So automatic headlamp dimmer dipper system is important which helps stop accidents and keep both drivers safe.
Hence, this circuit do dimming work by itself and makes driving easy on busy road with no need to worry.
Circuit Working:
Parts List:
| Components | Values | Quantity |
|---|---|---|
| Resistor | 1k 1/4 watt | 1 |
| Light Dependent Resistor any standard type | 1 | |
| Preset 10k | 1 | |
| Semiconductors | Transistor BC547 | 1 |
| Diode 1N4007 | 1 | |
| Relay DPDT 12V | 1 | |
| Automobile Bulbs High Beam and Low Beam | 2 |
To begin with, main part of this circuit is transistor which works like comparator, also it checks LDR resistance and compare with fixed resistance.
We must place the LDR on the windshield facing front, so it can detect light from other cars.
Also, when other car headlight hit the LDR its resistance goes down fast and then more current goes to transistor base, because of this transistor turn ON.
We should connect the DPDT relay to the transistor base, emitter and collector and when the transistor turns ON, the relay also turns ON and then it switches the headlight to the dipper filament.
So when other car come headlight become dim automatic and DPDT relay help to stop sudden flicker or cut it makes smooth change in headlight.
We put all parts like transistor, LDR, relay and circuit inside a small box and we keep this box near the driver for easy reach.
LDR must be outside the box so it can see light from front cars and this help it to change light in right time.
How To Build:
Below are the constructions steps for Automatic Dimmer Dipper Circuit for Automobiles:
Circuit Assembly:
- First, connect LDR with transistor to make voltage divider.
- Then connect DPDT relay to transistors collector, emitter and base.
- Set fixed resistance to compare with LDR resistance.
Relay Connection:
- Connect relay to cars headlamp wire.
- Use DPDT relay so headlight not flicker or loses brightness.
LDR Connection:
- Fix LDR on windshield facing road.
- LDR must see coming vehicle light clearly to work good.
Enclosure Installation:
- Put all circuit parts in small box near driver dashboard.
- LDR should stay outside box so it can see light from other cars.
Conclusion:
This Automatic Dimmer Dipper Circuit help make car more safe which help driver by changing headlight brightness when other car is coming at night where there is no need to do it by hand.
We must use this smart technique when an expert or mechanic installs it carefully.