wiring LEDS

Hi, i want to install leds on my car interior pillars.

I intend to have 3 LED each for each pillars, so there are total of 6 pillars.

Total LED used would be 18.

Can any experts here enlighten me on how should i do the wiring for the leds? Do i need resistors for each LED?

I also which to have a switch that have this function.. on/off/door. what type of switch allows me to have this 3 functions

how do i do the wiring if i hit the switch to door?

thanks in advance

Probably easiest to use the pre-wired LEDs, then just make groups of three of them, and connect each of their power wires together and each negative wire together to make a main power and ground wire for each group. Then run them to their appropriate spots.

i agree to that point. but ordering from oznium and then ship to SG is very troublesome.

so would like to wire it myself

You will need this if not using prewired LED...
http://led.linear1.org/led.wiz

Hi, i have bought 12 super bright white LED 5mm.

The shop recommended me to wire every 3 LED with 1 51ohm resistor (green brown blue gold resistor)

do you think the resistor is too high value?

fossildj wrote:

Hi, i have bought 12 super bright white LED 5mm. The shop recommended me to wire every 3 LED with 1 51ohm resistor (green brown blue gold resistor) do you think the resistor is too high value?

51 ohm seems like it would be ok or low. You need to check your information b/c a green brown blue resistor is 51 Megaohms.

green = 5
brown = 1
blue = 6

A 51 ohm resistor would be green brown black.

ah. sorry. Its black.. i make a mistake i tink its black. It seems dark blue. but looking closer its black..

so its alright?

btw i just bought the following switch..

this is how i wan my led to operate.

on/off/door

on : permanetly on
off : off the led
door : follow my car door switch (the car door switch is NEGATIVE powered)

How can i wiring them so it can operate in the above function?? The LED will have a new power line run from the battery (with fuse)

You'll wire position one to provide + to light them then run a RELAY to trigger on the negitive ground to provide positive power to the lights in position two...

OR connect the LED's to a hot line ,then you can run the switch as the ground and position one GROUNDS the LED's and lights them and position two uses the door switches to ground them and light them ...
The second method will not work if the switch is lighted

bad venge wrote:

You'll wire position one to provide + to light them then run a RELAY to trigger on the negitive ground to provide positive power to the lights in position two... OR connect the LED's to a hot line ,then you can run the switch as the ground and position one GROUNDS the LED's and lights them and position two uses the door switches to ground them and light them ... The second method will not work if the switch is lighted

what if the switch is in OFF position, wouldnt there be a battery leak? since the hot line is there[/b]

fossildj wrote:

bad venge wrote: You'll wire position one to provide + to light them then run a RELAY to trigger on the negitive ground to provide positive power to the lights in position two... OR connect the LED's to a hot line ,then you can run the switch as the ground and position one GROUNDS the LED's and lights them and position two uses the door switches to ground them and light them ... The second method will not work if the switch is lighted what if the switch is in OFF position, wouldnt there be a battery leak? since the hot line is there[/b]

You must have a complete circuit for any current to flow.

PwrRngr wrote:

You must have a complete circuit for any current to flow.

noted

hi, please take a look at my diagram.

on : permanetly on
off : off the led
door : follow my car door switch (the car door switch is NEGATIVE powered)

base on my diagram, where should i wire the door negative wire?

The - from the LED's goes to the MIDDLE terminal on the Switch
The - From the battery (or any ground goes to the left terminal
The Door pin switch - goes to the far right terminal
(sorry no paint shop here )

Hows this? seems ok?

Btw the car have 4 doors, and each door got its switch. Do i have to link all 4 wires to the far right terminal or just 1(probably the driver side door) will do?

That will work

bad venge wrote:

That will work

thanks alot!!

what about my car door switch? do i need all 4 doors to be link to the switch or just 1 will do?

If you'd tap it at the - side on the dome opening any door will light the leds , tapping one only that door will light them

bad venge wrote:

If you'd tap it at the - side on the dome opening any door will light the leds , tapping one only that door will light them

hmm so i gottta tap to the dome light?

door switch cant?

thanks guys for your help..

finally done

you need to have your car looked at. your sterring wheel is on the wrong side.

looks good.

above is the resistor i used to wire up my 3 super bright white led to 1 resistor.

after around 1 mth of installing my pillar lights, 1 set of my LED started blinking..

any one know wats wrong?

could it be the wrong resistor value i am using?

If they are blinking it's likely a loose or bad connection or a soldering point coming loose , pinched wire or something of that nature

i am quite sure nth is wrong with the connection or watsoever..

could it be the resistor value wrong?

or do i nd to have a voltage stabalizer?

If you used the same resistor on all the cluster and only ONE is blinking that tells me it's a connection ....
Otherwise they'd ALL be blinking

not one led blinking..

1 cluster of led bring (3 led)

Thats what I mean if only 1 CLUSTER is blinking and ALL of them are wired the same they would ALL be blinking

fossildj wrote:

i am quite sure nth is wrong with the connection or watsoever.. could it be the resistor value wrong? or do i nd to have a voltage stabalizer?

No, LEDs don't go on and of at low voltage. The more voltage that's applied, the brighter they get. The only reason they would blink is if they are on a blinker circuit or you have a loose connection.

Get a multi meter our and measure the voltage at the LEDs as they blink.