NC 'custom' LED lights retrofitted?

[Phil Martin]

If using in series make sure the breakover voltage is not higher than the
battery voltage or things will be dim. i.e. a nichia white LED can be over 4
volts each. If you want more reliability use a suitable zener diode in
parallel with each LED so if a failure occurs the others dont go out if
using them in series.
----- Original Message -----
From: "Pat Ford" <pford at qnx.com>
To: <diy_efi at diy-efi.org>
Sent: Tuesday, January 30, 2001 6:51 PM
Subject: Re: NC 'custom' LED lights retrofitted?


> Cool thanks for that info. BTW would you put ~ 6 in series then a current
limiter or just use separate resisters?
>
> Previously, you (Phil Martin) wrote:
> { I work for a company that use thousands of led's a week from HP led's in
red
> { , amber and also Nichia white, green and blues. You have to be careful
when
> { buying these as they come from different bins and the brightness can
vary
> { hugely. I have some 15 degree white LED's that are good enough for a
small
> { torch.
> {
> { All the led's have a life of aprox 127 years at 20mA except for the
white
> { which are at half brightness after 18 months continuous. This is because
> { thay are essentially a UV led with a white phosphor and the UV kills the
> { plastic.
> {
> { Run them all at 30mA and you should have no problems under nearly any
temp
> { conditions.
> {
> {
>
> --
> Pat Ford                           email: pford at qnx.com
> QNX Software Systems, Ltd.           WWW: http://www.qnx.com
> (613) 591-0931      (voice)         mail: 175 Terence Matthews
> (613) 591-3579      (fax)                 Kanata, Ontario, Canada K2M 1W8
>
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