Published on November 4, 2016
Bring Harry's Hedwig to life with the help of littleBits!
Using a few littleBits components and some household tools, you can make the official Hedwig doll (from Harry Potter's World in Universal Studios and elsewhere) move and light up. The circuit is fairly simple, but getting it to move Hedwig's head can be tricky unless done right.
The invention relies on using a servo to move the head of the Hedwig doll via the handle inside the doll (that is normally used to turn the head by hand). In order for this all to work, you need to attach the handle to the servo firmly to the servo, and then make sure that the servo is held in place in a way that leaves the head free to turn back and forth without any additional resistance. For our project, we used a tube from an air conditioner outlet that happened to be the right size, and held it in place with a plastic adapter and some wire. Then we made a perch for Hedwig to give her a good place to stand and watch!
Any of the littleBits triggers can be used for this one: the motion sensor is perfect, but we also tried it with the light sensor (as the lights dim, Hedwig's eyes light up!). But just to surprise people, our favorite was the new BLE chip, with a slider control in the littleBits app!
Make this invention for a Harry Potter party, and have Hedwig greet your guests!