Step One- Tear something apart
They don't have any battery holders for A23 batteries anywhere, so you're gonna have to make your own. First off, you're gonna need some electrical contacts. My first prototype used contacts from an old garage door remote. I bought some cheap door alarms for my other two times, which ended up being a lot better. How you acquire contacts is up to you.
Step Two- Pull a Mcgyver
My first battery holder was inspired by a homemade holder that used blister packs
. Now, that was okay, but the pack quickly melted when I messed around with the hot glue- making me search for a stronger alternative. Thankfully, my garage had some Lego bricks that were collecting dust.
First, hotglue the flat piece into the tin.
For the positive contact, I took a small piece of wire and soldered it to the contact. Next, I hotglued the contact onto a Lego brick.
For the negative end, I soldered the contact to the black wire that's already connected to the LED, and hot glued it to the another Lego brick.
Then it's all a matter of putting the contact pieces on each end of the flat piece. Put the positive contact near the hole you're gonna put the switch on.
Step Three- Switch it up
Install the switch. The switch I used came with a couple easy to loosen nuts. I took off both nuts before slipping the switch through the tin. Then I put one nut back onto the switch to keep it in place.
Step Four- Think Positive
The switch has two terminals, a long one and a short one. Solder the positive wire connected to the LED to the long terminal, and solder the wire connected to the positive contact to the short terminal.
Awesome! Now you have a copper-pipe-UV-Light! Time to push it one step further...