Welcome to the NavList Message Boards.

NavList:

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

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: Electrical Wire
    From: Jared Sherman
    Date: 2004 Mar 25, 12:32 -0500

    Geoff, with conventional LED's and conventional battery voltages tehre are
    many options and they are fairly simple. In fact there are a number of
    places on the web that supply "LED replacements" for regular flashlight
    bulbs, in the same form factor and case so they can just be dropped in as
    replacements. Probably not in the tiny size found in sextants, yet.
    
    Also of note, until quite recently there have been no white LED's, what are
    called "white" are actually blue/UV with a phosphor coating in them very
    much like miniature fluorescent bulbs, which is why they often had a bluish
    cast. These also typically needed 4+ volts to run. As of last month there is
    a new technology producing "real" white LED's that run at under 3v, so real
    white LED lighting for sextants should be possible later this year if they
    ship small ones.
    
    A "subminiature" red/yellow/green LED from any Radio Shack could be used
    now, two or three dollars worth of parts at the most including the dropping
    resistor. Good eyes and fine fingers may be needed though. If you have a
    burned out Plath bulb, I could probably try converting it to a direct LED
    replacement for you. The burned out bulb makes a very useful contact/mount
    for the LED.
    
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    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:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    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