Car LED Headlights dimmer?

[capwizard]

i bought Car LED Headlights but Headlights are getting far too bright.

How can I prevent people from dazzle by dimming the headlight? use resistors?

i would like to have Hi-Lo switch or adjustable brightness potentiometer.

[Curious.George]

Re: Car LED Headlights dimmer?

i bought Car LED Headlights but Headlights are getting far too bright.

How can I prevent people from dazzle by dimming the headlight? use resistors?

i would like to have Hi-Lo switch or adjustable brightness potentiometer.

Ain't gonna happen. Each "lamp" is a "smart module" that you'd have to reengineer to alter the lamp current.

But, you can take steps to ensure your lights are aimed properly! There's a (visible!) "notch" in the headlight's output that you use as a reference when checking their "aim" (shining the lights on a building while located on flat ground).

I noticed lots of folks flashing their brights at me (while I was on low beam) and took the time to verify that mine are aimed properly. Too bad for the other folks!

[capwizard]

Re: Car LED Headlights dimmer?

they are cheap ($12 per pair) aftermarket Car LED Headlights, i try to DIY an add-on dimmer switch, I don't want to hurt someone's eyes.

After I've installed the headlights, I though were pieces of junks, on the contrary, they are very powerful. All the road signs and road surface markings become more clear but at the same time, it is also very easy to make people dazzle.

[Curious.George]

Re: Car LED Headlights dimmer?

they are cheap ($12 per pair) aftermarket Car LED Headlights.

Ah! I can't help you, then. Mine are OEM'd with the vehicle. I suspect yours will have a switch-mode current driver that takes whatever "battery" is available and pushes a fixed amount of current into the diodes. You'd have to tweak the "set point" for that regulator to reduce their brightness.

[stj]

Re: Car LED Headlights dimmer?

make sure you have lots of space behind those for cooling.
the big mistake some people make is putting the original cap/dust cover back on.

[petehall347]

Re: Car LED Headlights dimmer?

if you get freezing weather and snow you may have to fit heaters for the lenses

[capwizard]

Re: Car LED Headlights dimmer?

My idea is this: isolate original power supply then get my own power supply from battery and add control circus for headlights.

Led strip dimmer controller | using one mosfet
https://youtu.be/mnJCRR3yoDU

In the meantime. I try to put a Cds (photo cell) sensor so I can control headlights automatically.

Automatic night light circuit diagram using mosfet
https://youtu.be/UaVFRyObpkU

[redwire]

Re: Car LED Headlights dimmer?

Did you check and adjust the cutoff?
With retro-fits, low beam ends up is too high and blinds oncoming drivers.
This might be "too bright" - instead of it being the LED brightness.
It's really bad with retro-fitting projector-style headlights with HID, you need a shutter to cutoff the beam top.

[capwizard]

Re: Car LED Headlights dimmer?

Did you check and adjust the cutoff.
Yes. I adjusted by shooting light on the wall.
But pretty much nothing to adjust . the LED light sockets fit right in. That's why I need light dimmer.

[capwizard]

Re: Car LED Headlights dimmer?

Super Simple Dimmer Control Circuit 3/6/9/12V
https://www.youtube.com/watch?v=H_jKrGJN5Fk

DC DIMMER WITH ONLY ONE MOSFIT
https://www.youtube.com/watch?v=-bwdRlxvrw4

How To Make a Simple Touch Switch Circuit
https://www.youtube.com/watch?v=nux_M2fEqBc

[capwizard]

Re: Car LED Headlights dimmer?

Car LED Headlights

What I want is to turn on the headlights automatically at night. When the night light is on, I can adjust the intensity of the light.

Can this circuit I designed be implemented? pic 1

[stj]

Re: Car LED Headlights dimmer?

no, it will get too hot.

you need pwm squarewave.
drive the fet with a microcontroller or a 555 timer or a 4011 cmos chip

[budm]

Re: Car LED Headlights dimmer?

no, it will get too hot.

You need pwm squarewave.
Drive the fet with a microcontroller or a 555 timer or a 4011 cmos chip

+1
BTW, what is the current draw of that LED assembly?
Link to where you buy it from?

[capwizard]

Re: Car LED Headlights dimmer?

I bought it over Aliexpress, $12.78 for a pair, now they out-of-stock but I think they still have similar products.

In fact, this headlight does not use a lot of current, 12.11v @ 2.38A. I have done experiments before, I just used an irfz44 (60v 50A) could control the car headlights and it won't get too hot.

My goals are to let it be easy to make and not too complicate. The main purpose is to help peoples in developing countries.

In the meantime, I would like to use STM32 then write a program to control the LED heard light sequence.

[budm]

Re: Car LED Headlights dimmer?

The lamp is rated at 72W so how is it related to 28.8W?

[stj]

Re: Car LED Headlights dimmer?

maybe both together, driven at 14v???

[capwizard]

Re: Car LED Headlights dimmer?

The lamp is rated at 72W so how is it related to 28.8W?

Maybe in the car battery is 13.5v not 12.11v.

They mention about 24v. Maybe uses 24v or a pair leds total power.

[capwizard]

Re: Car LED Headlights dimmer?

I will let this led light dimmer turn on for at least 3 days see what will happen? Pic1, 2, 3

Pic4 MOSFET is from junk board 50N06 (60v, 50A).

Ps..each LED head light has 60 of small leds, each side has 30 of them. I counted on pic 1. The back dot in pic 1 is the dust.

[budm]

Re: Car LED Headlights dimmer?

The Voltage reading of 12.17V @.177A, is it the Voltage reading on the LED terminal or on the input feeding Voltage to the circuit. What is the Voltage between S and D pin of the MOSFET? Once you know that then you can calculate the Power dissipation of the MOSFET.

[redwire]

Re: Car LED Headlights dimmer?

I think we're assuming the LED headlamp is like a light bulb, a linear load.
But inside is most likely a boost/buck converter.

So supplying the LED lamp with 10V or 15V should give the same (constant) power to the LED's and not really dim it.