For my Halloween costume I will be Grand Duchess Anastasia Nikolaevna (Princess Anastasia) of Russia. I am working between two concepts, a LED tiara and an LED scepter. The scepter will most likely be powered by a motion sensor to be activated when I wave it. The crown and scepter will be complimented with a ball gown and ball gloves, to represent the duchess in all her regal glory.
Both the crown and scepter are already made and in my possession, so I will have to wire either one of them with a simple circuit with a motion sensor attached using the Arduino Gemma and an external battery.