Results 1 to 5 of 5

Thread: Flashlight project

  1. #1
    Water Cooled Diamon's Avatar
    Join Date
    May 2010
    Location
    Sweden
    Posts
    516

    Default Flashlight project

    With the days getting shorter and shorter I figured I'd improve an old underwater flashlight my dad had lying around.

    The basic idea is to replace the light bulb with some bright white LEDs to up the power and efficiency of it. I'll even be able to use it while diving since I won't have to damage the case!

    And now for some pics of the building:

    The victim!


    The aluminum sheet with a grid of holes drilled into it for the LEDs


    The hardware I needed to buy

    -LEDs
    -Wire
    -Heat shrinking
    -Battery holders (needed to reach 6 volts which is required by the LEDs)
    -Resistors
    -9v battery connections
    A total cost or roughly $70

    During the soldering process:


    First row of LEDs


    About half the LEDs done


    Really need to get a proper work bench


    All of the LEDs done




















    Total cost: $71
    Hours of work: About 6
    Projects: RGB Tower - Custom CPU water block

    Watching someone else use your computer is like watching a drunk orangutan solve a rubix cube. They have no idea what they're doing and you just wish they'd hand you the damn thing so you can do it yourself.
    -TheOatmeal

  2. #2

  3. #3
    Local laser guy! Collinstheclown's Avatar
    Join Date
    Aug 2006
    Location
    Philly, PA
    Posts
    623

    Default Re: Flashlight project

    Wow! Looks cool, but it could have been a LOT easier. Should have done a 7 x 8 array with every 4 grouped together on a 1 Ohm resistor. Would've only have 14 resistors. Assuming your using all 8 AA's which would give you 12V, and assuming the white LEDs draw 3v.

    Or you could have used a 3W luxeon star, either way.


    I'm not dissing the project, I think it looks awesome. I love that many resistors bundled up!

  4. #4
    Will YOU be ready when the zombies rise? x88x's Avatar
    Join Date
    Oct 2008
    Location
    MD, USA
    Posts
    6,334

    Default Re: Flashlight project

    What are those LEDs rated at? It looks cool, and with the price tag, I'm guessing they're pretty high power...
    That we enjoy great advantages from the inventions of others, we should be glad of an opportunity to serve others by any invention of ours, and this we should do freely and generously.
    --Benjamin Franklin
    TBCS 5TB Club :: coilgun :: bench PSU :: mightyMite :: Zeus :: E15 Magna EV

  5. #5
    Water Cooled Diamon's Avatar
    Join Date
    May 2010
    Location
    Sweden
    Posts
    516

    Default Re: Flashlight project

    @Waynio thanks

    @Collinstheclown I'm using a 2x6v setup so the batteries are wired pin parallel in groups of four and the white LEDs use 6v so I think this was the best way of doing it. I could've wired the LEDs in pairs and used half the resistors but this way is more robust in my opinion. I did consider getting one really powerful LED but since this was my first project of this kind I wanted to go with what I already knew. If I make another it will be with more powerful LEDs. Thanks for the feedback

    @x88x The specs of the LEDs are: 3mm 6v 3500mcd
    Projects: RGB Tower - Custom CPU water block

    Watching someone else use your computer is like watching a drunk orangutan solve a rubix cube. They have no idea what they're doing and you just wish they'd hand you the damn thing so you can do it yourself.
    -TheOatmeal

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •