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Electronics experts....LED's???
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
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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 :top:
Have ordered a full set for my dash in blue which are a direct replacement for standard bulbs,the resistor is built into base :clap: Can get them for £1 a pair on E-Bay,Demon Tweeks want £6 a pair :eek: :top: |
some LEDs have resistors built into them for 12v use particualrly!
useful! look up Maplin and RS components websites :) alex |
:)
Yes it can be done using a resistor, i think u can use any that u wish |
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 :DD:, 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 :top: |
:top: my valves tell me when I need to change :cry:
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Try maplins i got a load 4 mine cost about 15p each. :top:
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Cheers Fellas for the replies :top:
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When working out the ohm value of the resistor that a car's battery isn't often at exactly 12v they are normally higher, especially when they are being charged. Its not that critical Matt, it will 1k is ok from aout 9 to 15 v :) |
http://img.photobucket.com/albums/v3...LedDash24k.jpg
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 |
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