Re: Coach lighting

Tom Cockle

I use a bridge rectifier ahead of the LED lighting (so that when I run at my DC-only club the lights work in both directions).   Since a bridge rectifier is actually four diodes, doesn't this solve the reverse voltage problem as well?
Or should I add another diode?
Tom Cockle
McKinleyville CA

Re: Coach Lighting

Wed Jan 29, 2014 7:39 pm (PST) . Posted by:

"Ed S" ed.kolt


Thanks that makes sense. I will include a diode if I decide to power 
LEDs from the track.

Ed S

At 10:14 PM 1/29/2014, you wrote:
>LED's will stand only a few volts (5-7) in reverse from the normal 
>polarity for lighting them. If on DCC they are under reverse voltage 
>half the time. If you have 2 or 3 in series the reverse voltage 
>might divide evenly, but very unlikely, so it's best to prevent 
>stressing the LED's by adding a regular diode as well. These are 
>usually have minimum reverse rating of at least 59 volts so more 
>than adequate for DCC track voltage levels. And yes someone may be 
>using them without diodes and so far nothing happened, but that's no 
>substitute for a little proper engineering.

Join to automatically receive all group messages.