[Healeys] LED polarity

[Oudesluys]

Right.
There is often an indicator on one of the two feed wires: black, white, 
red line on one of the wires, indicating this is the positive wire.
Kees Oudesluijs



Op 29-2-2016 om 19:29 schreef Michael Oritt:
> Thanks all for the many responses and now that I know I will not blow 
> the LEDs should I wire things backwards I will find a replacement 
> transformer and proceed. With no way of knowing which of the two wires 
> that run to the LED string my chances are 50-50 I will get it right, 
> but if not I will simply reverse leads.
>
> Best--Michael Oritt
>
> On Mon, Feb 29, 2016 at 1:01 PM, Richard Ewald 
> <richard.ewald at gmail.com <mailto:richard.ewald at gmail.com>> wrote:
>
>     The part that bothers me is the 24V.  That is way, more voltage
>     than an LED is supposed to run on. There needs to be a dropping
>     resistor in the circuit or the LEDs will go up in smoke.
>     Rick
>
>     On Mon, Feb 29, 2016 at 9:49 AM, Mike Garvey <r3m1g4 at verizon.net
>     <mailto:r3m1g4 at verizon.net>> wrote:
>
>         Some LEDs have built-in steering diodes (as in a full wave
>         bridge rectifier) and will run on either polarity. In theory,
>         this should allow them to run on AC supplies as well.
>
>         Mike
>
>         *From:*Healeys [mailto:healeys-bounces at autox.team.net
>         <mailto:healeys-bounces at autox.team.net>] *On Behalf Of
>         *Michael Oritt
>         *Sent:* Monday, February 29, 2016 12:14 PM
>         *To:* Austin Healey
>         *Subject:* [Healeys] LED polarity
>
>         This really is not a car-related question though I guess we
>         could make it into one:
>
>         I have some 24VDC outdoor LED lighting and the wall-plug type
>         transformer is defective.  I cannot determine which of the two
>         fine wires that run to the appliance (LED's) is positive. I
>         can find a replacement transformer online.
>
>         Here's the question:  I understand that LEDs are
>         polarity-sensitive and if I wire them up backwards will I
>         destroy the LEDs or can I simply reverse the polarity?
>
>         Best--Michael Oritt
>
>
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