Vincenzo

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  • in reply to: Stationary RV living – Park Costs #835
    Vincenzo
    Participant

    I came across a trailer/mobile-home park in Sussex county, NJ, that charges $310/month, and another in Center County, PA (close to state college) that charges $190/month in addition to electric bill and a quarterly water bill. Is there still a gold rush in CA?!

    in reply to: LED Lighting #821
    Vincenzo
    Participant

    Stratman50th,
    I looked at the vendor you bought from and saw a 5 SMD bulb sold for $6, where I can get the exact same thing from ebay 20/dollar!!!

    Those so-called “American companies” get bulk from Alibaba.com (off course from China, much cheaper than ebay) and in the example i compared multiplied the price by 120.

    This is my field, so I can give some advice here.

    All the very expensive mains LED bulbs that are sold in places like Home Depot (that I try to never go to…overpriced in a funny way) are a category, while the low-voltage (around 12 volt) ones that come from China (ebay or an opportunist “American” seller) are a totally different category.

    The first category never get hot as compared to the second one.
    It is not the LED’s that get hot and consume power, but the current-limiting resistor(s) in the package. The first category doesn’t use resistors but semiconductors (power transistor current source). So, the best way is to get only LED components from ebay dirt cheat and a special LED power supply that is a couple of bucks and work on a project to make your own LED fixtures. That should be a nice project to consider. Believe me, you don’t need any advanced electronics training to do that. Here’s an example from youtube:

    This video shows how to get power led’s heat-sinked by the mounting Aluminum strip

    This video makes the power supply (a little bit of electronics)

    you may buy the LED power supply instead of soldering one, like here:
    http://www.ebay.com/itm/1w-3w-4-5w-4-7w-8-15w-LED-Power-Driver-Light-Power-Supply-AC-85-265V-Stable-Firm-/361162518443?pt=LH_DefaultDomain_0&var=&hash=item5416f6afab

    or here:
    http://www.ebay.com/itm/5A-DC-Buck-Converter-CC-CV-12v-5v-24V-car-Solar-Battery-Charger-LED-Drive-w-PWM-/271658174332?pt=LH_DefaultDomain_0&hash=item3f4016c77c
    I’m quoting what the people of Make said in one of their comments to this last video “Typically LEDs require a resistor (for each LED) to resist your supply voltage and deliver the precise voltage required by the LED to emit. Because the maker wanted to use 12VDC for use in motor homes (engines typically use 12V batteries), he multiplied the LEDs into series of 3 (3.3V x 3 = 9.9V). The 555 provides the timing sequence needed to provide Pulse Width Modulation, so the LEDs flash faster than your persistence of vision at approximately 10V per series (without resistor!).”

    Please Pippi, remove the URL’s that I posted if that is not appropriate

    • This reply was modified 9 years, 7 months ago by Vincenzo.
    in reply to: I can’t decide what to buy! #820
    Vincenzo
    Participant

    Hello Hollywoodjimbo (Jimmy). Can you please give me some numbers and explanations…like the price of the trailer you bought or the $300 for 8 months (is that only for a parking spot, or for some utilities?).

    Thanks

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