Let's give Trinket a try!
Grab a barrel socket and your on/off switch.
We will solder those after these two components are installed in the base.
The end-product would look something like this... I made the mistake of cutting some of my wires a little short.
I decided to combine the ground connections on the on/off switch and power on the barrel connector.
- bare wire = pin #0 (NeoPixel signal in)
- yellow = power (BAT pin)
- black = ground