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Calling All Electrical Buffs! (now with good LED's found) 

 

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 Post subject: Calling All Electrical Buffs! (now with good LED's found)
Posted: Wed Nov 23, 2005 3:57 pm 
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http://cgi.ebay.com.au/10-x-LEDs-in-Red ... dZViewItem

Thinking of buying these. Will they work in my cars electrical system? ie: in the trip computer. My car normally takes 12v DC globes, so will these 5v LED's work in place of the globe? (Sorry... I know jack s**t about electronics!) :oops:

 

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Last edited by fordzatmyplace on Thu Nov 24, 2005 1:58 pm, edited 1 time in total.

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Posted: Wed Nov 23, 2005 4:55 pm 
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NOPE, they will go pop if you put 12v across them, even at 5V they wont last long, you need current limiting resistors in series with them, should be about 430ohm your looking for 14v/430ohm = 30mA which is the rated current for most LED's like those

 

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Posted: Wed Nov 23, 2005 10:44 pm 
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they will work with the right info u would be better off buying the bright onesfrom jaycar, you know you can actually buy these things online from jaycar its not rocket science you know
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Posted: Wed Nov 23, 2005 10:47 pm 
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oh, i just read it properly that time, 3mm LED's wont nearly be bright enough, you need 5mm+ LEDs (and resistors to match the maximum rated current for them)

 

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Posted: Thu Nov 24, 2005 12:30 am 
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get 5mm leds, and a 430 or 470 ohm resistor for each, u can frost the casing for better distribution of light, (use search for that) but yea u def need a resistor, a leds operating range is about 28mA, and remember you have a foward bias voltage drop of about .6V because the led is a diode. So if you want about 3V across the led u need a resistor to drop 10.2V with or roughly about (given ur car battery is 13.8V) and then you can work out wat power rating of the resistor you will need by getting the voltage across it, which is going to be about 10, square it, so 100, then divide it by the value of the resistor, so 100/430, mean its going to be dissipating about 4.3W, so if i was you i wud be asking jaycar for 430 ohm 5W resistors :D that way they have no chance of burning out :D (A), altho if u cant b assed doing all that, std 3c resistors will work :P

 

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Posted: Thu Nov 24, 2005 12:04 pm 
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You thinking of putting them in your cluster... if so bad idea toyed with that idea hit big problems too dim.. just f**k... just buy new cluster:):) more fun involved:)
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Posted: Thu Nov 24, 2005 1:21 pm 
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Rapier wrote:
they will work with the right info u would be better off buying the bright onesfrom jaycar, you know you can actually buy these things online from jaycar its not rocket science you know


can't say i even knew that jaycar even had a website :oops:

i'll peep it out holmes

 

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Posted: Thu Nov 24, 2005 1:56 pm 
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http://www.jaycar.com.au/productView.as ... &CATID=&ke

Ok, what about these? Does "viewing angle: 25" mean that it has a viewing angle of 25 degrees? Will this work with 12v? And will I have to solder up any resistors and s**t to these?

 

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Posted: Fri Nov 25, 2005 6:28 pm 
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fordzatmyplace na dont buy them...

here, take a look at this :D

i've just recently done my whole dash in blue and red using leds.

http://pertheseries.11.forumer.com/viewtopic.php?t=193
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Posted: Fri Nov 25, 2005 7:14 pm 
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nesa09 wrote:
fordzatmyplace na dont buy them...

here, take a look at this :D

i've just recently done my whole dash in blue and red using leds.

http://pertheseries.11.forumer.com/viewtopic.php?t=193


what ones should I buy? which ones did you use!?

 

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Posted: Fri Nov 25, 2005 7:18 pm 
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buy Narva Leds part number 47902
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Posted: Fri Nov 25, 2005 7:19 pm 
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here : http://www.narva.com.au/Globes_5.html

Ring whever you can ... Repco... i dont know if they are down in Tasmania but ask for Narva dash panel globes part number 47902 usually 10 for $25
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Posted: Fri Nov 25, 2005 7:26 pm 
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nesa09 wrote:
here : http://www.narva.com.au/Globes_5.html

Ring whever you can ... Repco... i dont know if they are down in Tasmania but ask for Narva dash panel globes part number 47902 usually 10 for $25


Aha! thanks! How bright are they? how many did you have to use to get the same results that you did in your car?

 

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Posted: Fri Nov 25, 2005 9:20 pm 
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they are just a straight swap led globe, only need the six, for the cluster. and one for the trip computer!

 

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Posted: Fri Nov 25, 2005 9:34 pm 
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Laximah wrote:
they are just a straight swap led globe, only need the six, for the cluster. and one for the trip computer!


do you have to flatten the tops off or any thing?!

 

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