Can Led's of a suitable colour be used as dashboard warning lights, when used with a resistor to drop the voltage down???

If so, are they special Led's for flashing or just standard ones???

Cheers

Jared

 

Yes it can be done using a resistor, i think u can use any that u wish

 

yes u can. as u say just use the correct resistor to bring down the 12v feed to whatever rating the LED is.

Some LEDs are designed to flash when supplied with a constant voltage others are constantly lit.

try www.ultraleds.co.uk for more info - this fella has lots of 12v auto LEDs.

 

Plenty on E-Bay too m8

Have ordered a full set for my dash in blue which are a direct replacement for standard bulbs,the resistor is built into base

Can get them for Ł1 a pair on E-Bay,Demon Tweeks want Ł6 a pair

 

some LEDs have resistors built into them for 12v use particualrly!

useful!

look up Maplin and RS components websites

alex

 

Not quite mate, for 12 V you just need a normal LED and a 1k (brown black red gold bands) resistor soldered in series with it .

 

AFAIK in some dark and distant past and reading boring construction for use rules, green must be used for indication, blue for aux lighting and amber for warning etc. If the vehicles going for a new SVA test it could possibly fail if fitted incorrectly.

Then again I may have been dreaming it all

 

Just got a few Bi-Colour LEDs for my dash.

My alarm flashes a 3m red LED at the moment on the dash, all well and good , however I want to use the same LED for my shiftlight from the ECU, so.....with a bi colour LED, it will now flash RED when the alarm is doing its thing, and Green when i need to change

 

my valves tell me when I need to change

 

Try maplins i got a load 4 mine cost about 15p each.

 

Cheers Fellas for the replies

 

--

 

Its not that critical Matt, it will 1k is ok from aout 9 to 15 v

 

Trying to work out what is happening here, the righthand part of the drawing (the Led straight down from 12v) is the same as the rest of the circuit, but this part is for the Red Ignition lamp but using an Led Instead.

So can you explain what components these are, and what they are doing???

 

the other is a diode... like a one way valve!

you dont need to worry about it!

alex

 

The only light that might be a problem is your alt warning light - this might need more current through it than the LED can pass for the regulator to kick in properly (then again, it may not) - a transistor would sort it.

Everything else would be cool beanz (Y)

/al