Range Finder LEDs

  1. #1
    animattor's Avatar
    Member Since
    Feb 2014
    From
    Las Vegas NV
    Posts
    177

    Range Finder LEDs

    Is there anyone willing to share a schismatic of how to put together a small board with the LEds for the rangefinder. I really want to build it myself to keep my costs down but am unsure of the resistors needed. Thanks guys.

  2. #2
    Jc27's Avatar
    Member Since
    Jun 2012
    From
    Pennsylvania
    Posts
    1,712

    Re: Range Finder LEDs

    You need to know the input voltage, the voltage of the LEDs as well as their current draw, to figure out what size resistors you will need.

  3. #3
    Jigglenomicon's Avatar
    Member Since
    Mar 2013
    From
    Denmark
    Posts
    169

    Re: Range Finder LEDs

    you can use this calculator to know how big of a a resistor you need
    but only if the leds draw the same voltage and forward current
    LED series parallel array wizard

    For example i have 3 leds running in a parallel circut ,
    Eatch draw 1.5 to 2v and their forward current is 20mA ,
    so if i use a 9v battery i need a 150 ohms resistor.

    Hope that helps a tad.

  4. #4
    animattor's Avatar
    Member Since
    Feb 2014
    From
    Las Vegas NV
    Posts
    177

    Re: Range Finder LEDs

    Thanks Jig that info was what was missing when we were at radio shack.

  5. #5
    Jigglenomicon's Avatar
    Member Since
    Mar 2013
    From
    Denmark
    Posts
    169

    Re: Range Finder LEDs

    eh.. doh i meant a serial circuit not parallel .
    the calculator should work in both cases i think.

  6. #6
    Jigglenomicon's Avatar
    Member Since
    Mar 2013
    From
    Denmark
    Posts
    169

    Re: Range Finder LEDs

    also if you want some blinking red leds on top of the rangefinder you can get some that works without having a timer on your circut
    [FONT=arial]MSB557DA datasheet[/FONT]

Similar Threads

  1. What kinds of LED's does the range finder have?
    By mcabrera1275 in forum Boba Fett Helmet
    Replies: 7
    Last Post: Apr 3, 2011, 3:37 PM
  2. Jango LED range finder sizing?
    By Bobby Fett UK in forum Jango Fett Costume
    Replies: 6
    Last Post: Jan 6, 2009, 6:20 PM
  3. Lets put this under the microscope= ESB Range finder
    By tk0000 in forum Boba Fett Helmet
    Replies: 8
    Last Post: Feb 4, 2003, 4:23 PM
  4. my range finder blueprints
    By secol_FETT in forum Boba Fett Helmet
    Replies: 7
    Last Post: Nov 24, 2002, 7:14 PM
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •