Error Free Number Plate LED Lighting - The CHEAP and easy way!

[kamold]

@Kamold: yeah good placement. That's where mine is going next. Just worried about how I'm going to keep it attached to the housing. Scared the soldering will come undone. Did you wrap it around a bit too? Or just solder the ends straight on?
ps- pro MSpaint skills

MSPaint FTW
The resistors have long enough wires on them to wrap them around the bulb holder first (using needle nose pliers) before soldering. So they seem to be pretty secure. Have been in for about a week without fault.

[benough]

I understand what you mean now. Didn't know they were 0.5W!
I will do the exact math for you tomorrow when my brain isn't fried and let you know.

Oh great, thanks!

[Qwertypants]

My LED bulbs are 0.5W. I use 5W b/c that's the resistance of the stock bulb that comes with the car and what the CANBUS needs for it to not trigger a bulb out light.

I use them b/c they are the only proper 4200K LED you can get. Don't ask how much I paid for them.

After being in this thread, I think I still need a 5W resistor but maybe a different ohm value.

---------- Post added at 10:21 PM ---------- Previous post was at 10:13 PM ----------

This is what I have...

Car Bulbs › LED Car Bulbs | PowerBulbs

Go to the Philips C5W ones. They are much cheaper than 1 year ago.

Ok so, I consulted my electrical engineer contact since I can't do the math without all the details. Figured I'd ask him what he thinks is going on, and this is the verdict:

I need to know what resistance your resistors are in ohms. (You saw mine are 270 ohm 1 watt).
Melting plastic means that a very high current (in Ampers) is flowing because of a low value resistor (in ohms).
Thus your resistor becomes an oven until the temperature destroys it.

So what exact resistor are you using? I am worried you are going to blow up your circuit.

We don't know the LED bulb internal resistance, don't know how many LEDs are connected inside each bulb parallel, how many strings connected in series, plus the value of the built in resistor in car.

Obviously you won't know all this data. But if you tell me the exact resistor you are using, I can help.

Oh man, I read this again and it sounds so complex. God damn modern car electronics *shakes fist*

[benough]

Sorry for late reply.

Will grab the LED box and a photo of the resistor this arvo and post it up.