Steve, Think of PWM (pulse width modulation) as turning the LEDs on and off very rapidly, so the visual effect is dimming of the lights. The problem I see with the buck converter you show is the total output current. Depending on how many lights you'll be running, you might exceed it's 1.5 A output. So, for one short strip it should be more than adequate, but if you intend installing it in line from the circuit breaker to ALL of your lights, the total might exceed the converter's output. Depends on how many lights you have, and whether you replace all of the incandescents with LEDs. On MYSTY, for example, there are 10 overhead cabin lights, all converted to LED. My strips (with double-wide high-output LEDs) use about .6 A per light fixture, so the total could be (if all were on at once) far exceeding this converter's output limit. On the other hand, if you use one of these converters per LED fixture, it should be fine. Bill MYSTY Landfall 39 In a message dated 6/28/2013 10:50:49 P.M. Eastern Daylight Time, stevanpla...@gmail.com writes:
Ok, I'm convinced .. would this work: http://www.ebay.com/itm/CAR-LED-Waterproof-20w-DC-DC-Buck-Converter-24V-to-1 2v-/251173241355 Also, what about dimmers? I see PWM dimmers on ebay purpose built for LEDs but they don't step the voltage down. How does that work? Steve Suhana, C&C 32 Toronto On Fri, Jun 28, 2013 at 9:52 PM, Knowles Rich <_rich@sailpower.ca_ (mailto:r...@sailpower.ca) > wrote: I'll see what it looks like when it gets here. A shot of lacquer will probably do just fine to seal it. Or a shot of liquor for me if it helps. Rich Knowles Indigo. LF38 Halifax On 2013-06-28, at 22:07, Graham Collins <_cnclistforward@hotmail.com_ (mailto:cnclistforw...@hotmail.com) > wrote: Hmm... screw terminals, yes, but nice? Well, if I were buying it to put on a boat I would first give it a scrub with isopropyl alcohol to get the flux off, and it wouldn't hurt to brush some epoxy on it to seal it. Otherwise the residues I can see in that picture will eat the circuit board within a year. Graham Collins Secret Plans C&C 35-III #11 On 2013-06-28 5:02 PM, Knowles Rich wrote: > Steve and others: > > I chose the unit I noted because it has a toroidal transformer which likely makes it a switching unit and, according to the description, it will maintain a constant output regardless of input voltage. Also it has nice screw terminals. > > Rich Knowles > Indigo. LF38 > Halifax > > On 2013-06-28, at 9:25, Steve Thomas <_sthoma20@sympatico.ca_ (mailto:sthom...@sympatico.ca) > wrote: > > > Rich, > On a second look I realized that the devices I ordered will not work for you since the output voltage cannot be adjusted > lower than the input. > > This unit might suit your application. It is a purpose built constant current LED driver from the same guy, and even less > expensive. > > http://www.ebay.ca/itm/DC-Converter-Constant-Current-Voltage-1-3-30V-LED-Driver-Battery-Charger-LM2596-/390616867671?pt=LH_Defaul > tDomain_0&hash=item5af2946357 > > Steve Thomas > C&C27 MKIII > Port Stanley, ON > > -----Original Message----- > From: CnC-List [mailto:_cnc-list-bounces@cnc-list.com_ (mailto:cnc-list-boun...@cnc-list.com) ]On Behalf Of Steve > Thomas > Sent: Friday, June 28, 2013 8:12 AM > To: _cnc-list@cnc-list.com_ (mailto:cnc-list@cnc-list.com) > Subject: Re: Stus-List LED cabin lights > > > > Rich, > I ordered 4 similar devices from this guy a couple of days ago. The price is a bit better directly from China. My intention > is to be able to run 24 volt equipment. > > http://www.ebay.ca/itm/281041084321?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 > > Steve Thomas > C&C27 MKIII > Port Stanley, ON > > > -----Original Message----- > From: CnC-List [mailto:_cnc-list-bounces@cnc-list.com_ (mailto:cnc-list-boun...@cnc-list.com) ]On Behalf Of > Knowles Rich > Sent: Friday, June 28, 2013 7:31 AM > To: _cnc-list@cnc-list.com_ (mailto:cnc-list@cnc-list.com) > Subject: Re: Stus-List LED cabin lights > > > For those who may recall my little LED cabin lighting project (Fred for one), I noticed that there is some light level flutter > when my Espar heater or refrigeration is running, an effect that is not noticed on incandescent lights. I am also concerned about > the long term negative effect of high voltage levels during battery charging. The only practical solution is to install a voltage > regulator in the lighting circuits. > > After a day of unsuccessful local research, I stumbled on the URL below and have ordered a couple to try out. The source _dx.com_ (http://dx.com/) is > an interesting one you may wish to explore a bit. > > _http://dx.com/p/car-150w-dc-8-32v-to-9-46v-voltage-boost-converter-regulator-for-laptop-blue-206971?utm_rid=95527470%2C95527470&ut_ (http://dx.com/p/car-150w-dc-8-32v-to-9-46v-voltage-boost-converter-regulator-for-laptop-blu e-206971?utm_rid=95527470,95527470&ut) > m_source=shopping&utm_medium=pcs&utm_campaign=paidshopping > > Rich Knowles > INDIGO LF38 > Halifax, NS. > > > > > > > _______________________________________________ > This List is provided by the C&C Photo Album > _http://www.cncphotoalbum.com_ (http://www.cncphotoalbum.com/) > _CnC-List@cnc-list.com_ (mailto:CnC-List@cnc-list.com) > > > _______________________________________________ > This List is provided by the C&C Photo Album > _http://www.cncphotoalbum.com_ (http://www.cncphotoalbum.com/) > _CnC-List@cnc-list.com_ (mailto:CnC-List@cnc-list.com) > > > _______________________________________________ > This List is provided by the C&C Photo Album > _http://www.cncphotoalbum.com_ (http://www.cncphotoalbum.com/) > _CnC-List@cnc-list.com_ (mailto:CnC-List@cnc-list.com) > > _______________________________________________ > This List is provided by the C&C Photo Album > _http://www.cncphotoalbum.com_ (http://www.cncphotoalbum.com/) > _CnC-List@cnc-list.com_ (mailto:CnC-List@cnc-list.com) > > _______________________________________________ This List is provided by the C&C Photo Album _http://www.cncphotoalbum.com_ (http://www.cncphotoalbum.com/) _CnC-List@cnc-list.com_ (mailto:CnC-List@cnc-list.com) _______________________________________________ This List is provided by the C&C Photo Album _http://www.cncphotoalbum.com_ (http://www.cncphotoalbum.com/) _CnC-List@cnc-list.com_ (mailto:CnC-List@cnc-list.com) _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com
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