Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    FW: Lights etc.
    From: Doug Royer
    Date: 2003 Oct 10, 14:45 -0700

    A conversation Jared and I were having.It's informative.
    -----Original Message-----
    From: Royer, Doug
    Sent: Friday, October 10, 2003 13:19
    To: 'jared.sherman{at}VERIZON.NET'
    Subject: RE: Lights etc.
    Jared,I don't know off hand but beleive there is circuitry inside each
    unit.I'll check when I get to the yard tomorrow and write back.
    As for the spikes and such from inductive loads I have placed 1,000uf caps
    and 15mh chokes in parrallel with each of the batteries to the boats
    ground.Also smaller value caps from +12v to ground  closer to each
    electronic device on board.
    I also beleive that the units installed I talked about earlier do indeed
    pulse at some frequency.I don't know this for certain and will find
    out.Makes sense though.If they would pulse  above 40 hz or so they would
    appear as always on and current consumption would go down.
    I bought the set up at a marine hardware store here on the west coast that
    the commercial boaters use.I'll have to check about the specs to meet the
    C.G. regs.I didn't check that just took it for granted they were being sold
    at a marine store and would comply.Good point and thanks for mentioning it.
    -----Original Message-----
    From: Jared Sherman [mailto:jared.sherman{at}VERIZON.NET]
    Sent: Friday, October 10, 2003 12:39
    Subject: Re: Lights etc.
    Doug, I would be very curious if you could look into those LED arrays you
    bought. Specifically, are there other "things" on the circuit board, or just
    the LED's?
    There is an issue regarding the use of LED's in a marine electrical system,
    in that LED's like most electronics are prone to damage from electrical
    spikes. And unlike cars (where the "run" circuits are physically
    disconnected during starting by the ignition switch) marine electronics tend
    to be left on during the engine starting process, so they are subjected to
    There are ways around this of course, but if there are 20 LED's in an array
    the manufacturer may simpy accept the loss of a few over the year in use. If
    you have seen LED arrays on the back of trucks and busses, this is not
    uncommon, to see several burned out over time.
    And the lights you bought--are they actually USCG approved?

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site