Step 1: Materials and such.
- Altoids tin
- 2 AAA battery holder from Radioshack.
- three way toggle switch that I scavenged. I used a three-way switch becuase I plan on eventually adding a circuit that will make the light have a blinking mode. If you don't care to add this extra complexity to the light, just buy a simple SPST on-off switch.
- three white, 3V LEDs given to me by a friend.
In my previous Instructable, I explained how LEDs need to have resistors wired in series with them to keep them from blowing out. In this case, I didn't need resistors, because the supply voltage was exactly 3V and the requirement was 3V. If you are using LEDs with a lower voltage requirement, you will need to add in a resistor to keep them from burning up.