This instructable is to make programmable light effects using an RGB LED (this is an LED containing individual Red, Green and Blue elements) and the low cost Adafruit Trinket microcontroller. These lights can be used and re-used for multiple projects such as night lights, party lights and pumpkin lights for Halloween. The entire project only costs around $10 fully assembled.
Step 1: Preparation
1 x Adafruit Trinket (5V) (http://www.adafruit.com/products/1501)
1 x Adafruit Perma Proto Breadboard PCB (http://www.adafruit.com/products/589)
1 x Diffuse common-annode RGB LED (http://www.adafruit.com/products/302)
3 x 220 ohm resistor
1 x 9V battery connector
Some female headers that shipped with the trinket
Some male headers (http://www.adafruit.com/products/392)
Note that you can use a solderless breadboard instead of soldering this onto a PCB (and you should always do this first to make sure it works before committing to PCB). However, if you want to keep and reuse this project, I definitely recommend using a PCB. The great thing about the Adafruit breadboard PCB is that it is laid out exactly like a regular breadboard with lines of connected pads which makes soldering so much easier in my opinion.