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LED conversion help on car

M

Method

Jan 1, 1970
0
I am trying to convert my rear lights to LED's Red and Orange ones. It is
for a nissan 300zx, what is the best way to make these? I am guessing a heap
of LED's, but what size resistors and regulators should i use? How many
should i hook up in parallel to each regulator?

Would a 12V to 5V regulator work fine? Sorry about the newby questions.
 
T

Trevor Wilson

Jan 1, 1970
0
Method said:
I am trying to convert my rear lights to LED's Red and Orange ones. It is
for a nissan 300zx, what is the best way to make these? I am guessing a heap
of LED's, but what size resistors and regulators should i use? How many
should i hook up in parallel to each regulator?

Would a 12V to 5V regulator work fine? Sorry about the newby questions.

**Silicon Chip Magazine, March 2003 published a good article describing what
you want. I purchased some PCB kits, which are suprlus to my needs. Contact
me, if you want them (at a fair price). Alternatively, they can be purchased
from Jaycar, or RCS Radio. Basically, the kit entails placing several LEDs
in series, with resistors to limit the current.
 
A

Albm&ctd

Jan 1, 1970
0
I am trying to convert my rear lights to LED's Red and Orange ones. It is
for a nissan 300zx, what is the best way to make these? I am guessing a heap
of LED's, but what size resistors and regulators should i use? How many
should i hook up in parallel to each regulator?

Would a 12V to 5V regulator work fine? Sorry about the newby questions.
I think you'll find whatever you make will not be legal.

Al

2003 insult page awaits your contribution
http://kwakakid.cjb.net/insult.html
 
T

Trevor Wilson

Jan 1, 1970
0
Albm&ctd said:
I think you'll find whatever you make will not be legal.

**Really? Then you should inform:
Mercedes Benz
BMW
Maserati
Range Rover
NSW Government buses
Many truck manufacturers
And many others.

All these guys use LED arrays, for their main stop/tail lights. Lots and
lots of others use them for high mount stop lights. All are legal in NSW
(and probably all other states).
 
F

Franc Zabkar

Jan 1, 1970
0
**Really? Then you should inform:
Mercedes Benz
BMW
Maserati
Range Rover
NSW Government buses
Many truck manufacturers
And many others.

All these guys use LED arrays, for their main stop/tail lights. Lots and
lots of others use them for high mount stop lights. All are legal in NSW
(and probably all other states).

That may be fine for original equipment, but doesn't the RTA require
that certain vehicle modifications be approved by one of their
registered engineers? Personally I don't see any problem, but we *are*
talking about officialdom ...


- Franc Zabkar
 
F

Franc Zabkar

Jan 1, 1970
0
**You've GOT to be kidding, right?

You think that the RTA (here in NSW) will worry about some stop lights?

Who knows? Bureaucrats can get picky about the most trivial things.
For example, my car once failed a rego check because the rubber pad on
the clutch pedal was worn.

In any case, curiosity has gotten the better of me, so to settle this
question I'll telephone the RTA.
Geez, I've seen old Commodores tooling around with less than 9 Volts on the
headlights. I know, my last Commodore had less than 10 Volts on the
filaments.

Hmm, so where did the other 4-5 volts go? Surely not in high
resistance connections?
It got through rego, no worries. 9 Volts translates to around
15 - 20 watts of low beam (and high beam) power.

You mean to say some overworked connector or switch was dissipating
around 10W?
May as well have a couple
of candles lighting the road. A couple of LEDs as stop lights (provided they
work) will sail through rego.


- Franc Zabkar
 
T

Trevor Wilson

Jan 1, 1970
0
Franc Zabkar said:
Who knows? Bureaucrats can get picky about the most trivial things.
For example, my car once failed a rego check because the rubber pad on
the clutch pedal was worn.

In any case, curiosity has gotten the better of me, so to settle this
question I'll telephone the RTA.


Hmm, so where did the other 4-5 volts go? Surely not in high
resistance connections?

**Yep. Vl Commodore. They were notorious for this problem. That and melted
fuse contacts. I lost around 0.75 Volts on the ground connections and the
rest on the positive. Admittedly, I gave you the worst headlight I measured.
The best showed 0.5Volts on the ground and 2 Volts on the positive. A couple
hours work, 4 relays and some 6mm mains power cable and the ground leg
showed around 0.05 Volts drop and the positive leg less than 0.15 Volts.
You mean to say some overworked connector or switch was dissipating
around 10W?

**Everything. Dodgy wiring, dodgy fuseholders, dodgy connectors. I had a VH
before that and the wiring was fine. My mechanic reckons the VLs were all
bad news.
 
D

D

Jan 1, 1970
0
Have a look at Silicon Chip Magazine from March or so this year.
Jaycar are stocking the PCB.
 
M

Method

Jan 1, 1970
0
Where can i get past issues of silicon chip magazine from?
 
T

Trevor Wilson

Jan 1, 1970
0
Albm&ctd said:
And perhaps they go through an approval process? Do you know what
ADR's are?

**Of course I know. However, there are some points you need to understand:

* The OP is not designing and releasing a new vehicle onto the Australian
market.
* All one needs to do is satisfy the demands of the mechanic who inspects
the vehicle at rego time. He/she will not know, nor care about the lights,
as long as they work.
 
A

Albm&ctd

Jan 1, 1970
0
I was involved on the tail end of a commercial project quite a few
years ago that involved manufacture of led lights for the transport
and mining sectors. From what I saw the concept was simple - series
resistors and a bunch of leds. From memory the hardest part was the
design of the lens. The ADR's were faily critical when it came to
light output versus view angle. The type of leds used and the design
of the lens (to refract the light properly) were a major issue.

Andy

I wonder how insurance would go if you had homemade or kit brakelights
and someone ran up your arse. If they didn't comply with ADR's then I
imagine shit would hit the fan. As far as I know you can still buy
lights for trailer etc that do not comply and they are OK to sell as
long as you don't fit them. I call this "bong law" :)

Al

2003 insult page awaits your contribution
http://kwakakid.cjb.net/insult.html
 
T

Trevor Wilson

Jan 1, 1970
0
Albm&ctd said:
I wonder how insurance would go if you had homemade or kit brakelights
and someone ran up your arse. If they didn't comply with ADR's then I
imagine shit would hit the fan. As far as I know you can still buy
lights for trailer etc that do not comply and they are OK to sell as
long as you don't fit them. I call this "bong law" :)

**I don't see where the problem is. For several reasons:

* If someone runs into you, they're in the wrong, regardless of the
operational status of stop lights.
* Rego checks do not include the brightness and visible angle of tail
lights. They're only interested if they work or not.
* LED stop lights are about 300mSec faster than incandescent. If anything,
they're safer, for that reason.
 
A

Arpit

Jan 1, 1970
0
Yep, you'd need to tell your insurance company about the mod.
Apparently they can refuse to pay out if you dont tell them
everything, like if you've got your windows tinted.
 
A

Arpit

Jan 1, 1970
0
**I don't see where the problem is. For several reasons:

* If someone runs into you, they're in the wrong, regardless of the
operational status of stop lights.

Oh come on, what if a small hatchback decided to stop suddenly, and
tere was a small truck behind it? Reaction time + stopping distance
difference would surely result in a crash. Somehow i dont think its
the truck drivers fault
 
I

Iain Chalmers

Jan 1, 1970
0
Arpit said:
Oh come on, what if a small hatchback decided to stop suddenly, and
tere was a small truck behind it? Reaction time + stopping distance
difference would surely result in a crash. Somehow i dont think its
the truck drivers fault

Thats why the truck driver was supposed to be keeping a longer
distance back...

He _is_ in the wrong in that situation.

I've got a police accident report that tells that to the 4WD guy
who ran into the back of me a while ago - he tried the "but
you've got better brakes" excuse too - didn't wash with the cops
or the insurance company... If you hit someone from behind, its
_extremely_ unlikely to not be your fault.

big
 
K

KLR

Jan 1, 1970
0
Oh come on, what if a small hatchback decided to stop suddenly, and
tere was a small truck behind it? Reaction time + stopping distance
difference would surely result in a crash. Somehow i dont think its
the truck drivers fault


It is the law

its your lawful duty as a road user to maintain a safe distance
between the front of you and the car in front of you. In the eyes of
the law - if it takes 100 metres at a given speed and conditions to
stop a truck - then he has a legal obligation to keep 100 metres clear
in front of him when doing that speed in those conditions.

I believe too that even if you are stationary behind a car and someone
rams up the back of you, pushing you into the car in front of you, you
are still in the shit for the damage you cause. (though you would
presumably do your best to dump it on the bloke behind who is the real
cause?). I dont know if non-working or non-approved brake lights come
into this though.

Either way - I wouldnt like to have been in any way in any sort of
accident - and have the investigators (or insurance company) discover
that you had home made brake lights or other modifications to the
vehicles safety systems that may or may not comply to standards. The
onus might be on you to prove it - and even if you are in the right -
it might cost you a fortune in costs to prove it in a court or to
defend your actions.

These days though they are probably more likely to bust you for
breaking some "C tick" standard ;)

Also the same advice above applies to the bloke on here recently who
wanted to make a DIY Cruise control for his car.

If you did have some non-approved brakelights etc etc that you bought
from some discount or auto parts store - there might be some case of
product liability from them or the manufacturer.

Again - I think that these sort of things are hassles that are better
off not being had in the first place.
 
R

Rod Speed

Jan 1, 1970
0
Trevor Wilson said:
**Think all you like. The truck is at fault. A driver of any vehicle is
required by law to maintain a safe distance between the vehicle in front.
The guy who runs into the back of someone, is always in the wrong.

Not necessarily, particularly if the brake lights of the hatchback have failed.
 
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