[DML] Re: LED discussion (was: #5939 at DCS'12)

["Welmoed" <welmoedj@xxxxxxxxx>]

Sorry overlooked that part.
You're right cutting a weatherproof package is not a solution.


--- In dmcnews@xxxxxxxxxxxxxxx, "Tom Niemczewski" <dmctom@...> wrote:
>
> Welmoed,
> 
> The LED strips are ready made and you can't really add or change the 
> resistors. The strips that are water resistant are covered with clear 
> urethane rubber to protect the circuit. So, in order to add resistors to 
> each group you would have to cut the strip at every group joint and add 
> resistors there. That is not really practical and will destroy the water 
> resistant coating. So, to make it easier you can just add one resistor. A 
> lot easier.
> If you were to make the strip yourself from scratch it would make more sense 
> to run three LEDs off of a LM317 connected as a current limiter. It would 
> keep the current constant from about 10 to 40 volts. You could connect more 
> than one 3-LED branch in parallel to make it more efficient.
> In store bought strips you have to work with what you have.
> 
> 
> Greetings from Poland!
> Tom Niemczewski
> Vin 6149 plus 2418, 3633, 5030, 16473, 17086
> Google earth: 52°25'17.66"N, 21° 1'58.40"E
> 
> --------------------------------------------------
> From: "Welmoed" <welmoedj@...>
> Sent: Wednesday, June 13, 2012 9:52 AM
> To: <dmcnews@xxxxxxxxxxxxxxx>
> Subject: [DML] Re: #5939 at DCS'12
> 
> > I agree, Tom.
> > However if the LEDs are grouped (3 or 5) why not add the appropriate 
> > resistor to each of the groups?
> > In case of failure, it will be only one group that fails, not one after 
> > another?
> > It's not the cost of the resistors, it's the safety  and reliability that 
> > counts.
> >
> > I presume Bitsyncmaster can elaborate on the subject much better than I 
> > can.
> >
> > Welmoed.
> >
> > P.S.: Shouldn't the subject line need changing to reflect the LED 
> > discussion?
> >
> >
> > --- In dmcnews@xxxxxxxxxxxxxxx, "Tom Niemczewski" <dmctom@> wrote:
> >>
> >> If your strip has 10 groups (30 LEDs) you will need a 1250 Ohm 1Watt
> >> resistor. If you can't find a resistor of the exact value go with the 
> >> next one up.
> >> Greetings from Poland!
> >
> >> Tom Niemczewski
> >
> >
> >
> >
> > ------------------------------------
> >
> > To address comments privately to the moderating team, please address:
> > moderators@...
> >
> > For more info on the list, tech articles, cars for sale see 
> > www.dmcnews.com
> >
> > To search the archives or view files, log in at 
> > http://groups.yahoo.com/group/dmcnewsYahoo! Groups Links
> >
> >
> >
> >
>




------------------------------------

To address comments privately to the moderating team, please address:
moderators@xxxxxxxxxxx

For more info on the list, tech articles, cars for sale see www.dmcnews.com

To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnewsYahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/dmcnews/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/dmcnews/join
    (Yahoo! ID required)

<*> To change settings via email:
    dmcnews-digest@xxxxxxxxxxxxxxx 
    dmcnews-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    dmcnews-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/