5 Minute Safety Light

About: I enjoy a variety of things. I'm an active volunteer since November of 2010 at Bunnyluv Rabbit Resource Center in Van Nuys, CA where I help care for the shelter and boarding bunnies. I love working with them...

I've always wanted a simple light that I could wear around my neck while working or walking at night. Flashlights can be too heavy or unwieldy and I could never get ahold of those head mounted lights to work very long. So with found parts and a few minutes of time, you can build this light.

By the way, I'm entering this into the LED contest so please vote for me!!

Step 1: Step 1: Materials

Here is the parts laid out. Not shown is the chain that I used to wear. In later versions, I used a zip tie to hold the chain and black spray paint to mask the pill bottle cap. Also note that the switch shown is not the one I ended up using. I used a SPST push button switch.

Step 2: Step 2: Attaching the Switch.

I used the soldering gun to melt a hole in the cap and threaded the switch into place while the plastic was still warm. I then trimmed and tinned the wires.

Step 3: Step 3: Attaching the Battery.

I soldered the positive side of the battery onto one of the wires. Lousy job I know...

Step 4: Step 4: Attaching the LED

I soldered the LED into position being careful to get the polarity correct. I can't stress this enough. If in doubt test on a spare battery then clip one of the leads shorter than the other and remember which is which.

Step 5: Step 5: Finishing Up.

Make sure everything fits into the bottle with the light as close to center and pointing down as possible. I wrapped the battery in electrical tape so that the possiblity of shorting out was reduced.

Step 6: Step 6: It Works!!

Now you can attach the chain, string or whatever to the bottle using either a rubber band or zip tie. I recommend using the zip tie, it'll look better. When I test it in my apartment, I can still see it at a distance of about 10 feet.



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    5 Discussions


    7 years ago on Introduction

    the shack sells a coin cell battery holder that will fit in the housing. Good way to repurpose "medicine" bottles.

    1 reply

    Thank you for the comment. It's amazing that I still can't find any other colors. I'd love to get my hands on some red ones. The blue one is my favorite though.


    7 years ago on Introduction

    I am never a fan of soldering directly to a battery, as this can burst one of those little coin cells really easy due to the heat. A good alternate method would be to use a conductive glue or just electrical tape.
    Overall though, I really like the simplicity of your desing. This would be a good thing to make up just before kids go out for Halloween, or running before/after daylight hours.

    2 replies

    Thank you. True, I normally don't solder directly to a coin battery but I couldn't figure out how to mount it into a holder and still make it fit in the container. Thanks for the compliment. It really does work. I've kept myself from being run over at least twice since I've started wearing it!