Hacked Gadgets Forum

April 12, 2006

What to do with Blue Balls

at 2:24 am. Filed under DIY Hacks, Electronic Hacks, Funny Hacks

Blue Bawls Automatic Light
Ok get your mind out of the gutter. I am talking about the beautiful blue glass bottle that the Bawls soft drink comes in. I tried one the other day and thought the glass bottle could be used for something interesting. At first I was just going to stick an LED into it, but I wanted something a bit more interesting. So I threw together a quick and dirty circuit that uses a photo-cell to turn on a transistor which powers an LED. The parts should cost only 2 or 3 dollars, and are available almost anywhere. (See page 2 for a parts list.)
I am pleased with the final result, a single super bright white LED lights the glass very well and looks better than I thought it would. There is more than enough light to light up a night table or something similar in size. It is currently running from a 9 Volt battery since that was the simplest means I had, however a small plug in transformer would also do the trick.

Video of the Blue Bawls Light in Action

Many people are asking who sings the song… The song is Weekend Full of Weekends and can be found here: Garage Band . Thanks to Andy McCaskey of Slashdot Review for turning me onto the site.

See how to make it on the next page.


Nov 2012 first popular than years as acne doctors retin . Nov 2012 first popular than years as acne doctors...

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161 Responses to “What to do with Blue Balls”

  1. Alan Parekh Says:

    Hi Steve,

    All of those details are provided (there are multiple pages, look in the lower right corner of the article)

  2. DYI Project Bawls and recycling. « Madarame’s Daily Blurg Says:

    […] September 22, 2009 · Leave a Comment Hello and greetings fellow bloggers and gamers. Tonight I’ll be posting a DYI Project on how to build a sensor sensative Gamer’s Light to spark up that avid gamer’s bedroom or apt. Here is the Video with a walk thru with commentary and all. Thank Hackedgadjets for this project please and show your support […]

  3. c0ntraman Says:

    Hey guys,
    I bought the required components but, I have just one question… what size Photocell do I use? Thanks for any helpful comments.

  4. Alan Parekh Says:

    Hi Contraman,

    The size doesn’t matter, just make sure that it increases in resistance when it gets dark.

  5. morales2k Says:

    First off, I want to thank Alan for an awesome DIY project. This can also be done with anything, from empty juice bottles to wine or rum bottles. Now on to my suggestion.

    Alan said:
    “It is best to place it on something that is white or at least a light color. The LED is pointing straight down and a good reflective surface helps. I am thinking of cutting a small round white disc of cardboard and gluing it to the bottom.”

    And a good thing could be a cd or dvd disc. I have a ton of those hanging around my closet because i refuse to throw them shiny things away. They are reflective enough to bounce off light very nicely. An empty cd or dvd case can also be a worthy container for your led lamp design. I loved the photocell usage. Had not seen one like this ever.

    I am also relatively new to these things, could you comment on the transistor usage? What is it for!? My electronics course pretty much covered resistances, and how to combine them to get higher or lower ohms from them, but I never learned about these other parts.

    Thanks in advance!

  6. laxmi sah Says:

    Hey guys,
    plz give me a circuit

  7. Alan Parekh Says:

    Hi Laxmi,

    There are many pages to this article, click on the other pages to find the circuit.

  8. Luiz Says:


  9. Chris Says:

    I’m trying to do something similar heres what i got, i’m trying to put a photocell in a string of 20 battery powered leds, how would you put it togeter i’m stumped Thanks

  10. Don Says:

    Wow! I’m years late but this still amazes me! It’s so cooooool!

  11. Steven Says:

    Yeah this is cool.
    Does anyone know how I can figure out how to make this with a 2-3 foot strip of leds instead of just one? Would I need a lower value resistor and more battery?

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