If you use a 6v battery pack remember to wire a 15ohm resistor to one of your leads
When I first powered mine up using two AA batteries, the whole kit seemed really nice and bright. A few days later after I wrapped everything up and tried it again to make sure everything still worked, it seemed much dimmer (at least half as much). I'm going to try a fresh set of batteries when I get a chance, but two questions:
1) Any idea how long this setup should last with just the two AA batteries? With LEDs I would expect a long, long time - which is why I find it odd.
2) If I switched to higher voltage, what would be the limit before blowing them out? E.g. if I wanted to use a 9volt it sounds like I would need to add a resistor? How much? And then does the higher voltage really buy anything? I assume the fact that they are wired in serial makes a difference?
Re: magnets
I tried soldering the wires to the side of my magnets, but couldn't get it to stick. I ended up using a hot glue gun to attach the wires next to the magnet and then bend the contacts over. That way when they come together, they just smash the wires together.
I used old magnets from my used sonicare brushes.
Not pretty, but it gets the job done and won't be seen anyway. The backing is a pin I had laying around that happened to be the perfect size, and I hot glued bobby pins so I could feed an ace bandage through it, and fashioned that into a little harness that will go under a shirt I'm planning to cut a hole in.