For this project we used cheap Halloween decorations that can be found in a dollar store and turned them into fully functioning robots.

For step one of making the skull a robot, we cut its head off from the stand with a small hacksaw.

We used a pan/tilt kit with two servos, the Arduino Uno and the HM-10 bluetooth module.

Skully requires the additional SG-90 servo motor.

See the attached schematics.

For housing, we used a cardboard gift box with a wooden lid.

We attached a battery pack with a on/off switch inside the box using double sided tape and cut a hole on the side of the box so the switch can be accessed from the outside.

We drilled a small hole in the lid for the wires that connect the LEDs and the servo motors to go through, and attached the pan/tilt mechanism on the lid.

To attach Ghosty or Skully to the pan/tilt mechanism, we used disposable forks. To attach Ghosty or Skully to the pan/tilt mechanism, we used disposable forks. The Skully's fork is shorter.

We made the red eyes using LEDs.

For Skully, we used another servo so he could move his mouth while he laughs, which looks awesome but requires a little bit more work that Ghosty.

Download the Arduino code from here https://www.robbie-app.com/Robbie_A1.ino

Connect your Arduino UNO to your computer using the USB cable.

Upload the code to the Arduino UNO

Download the iRobbie-A App to your iPhone from Apple AppStore

Run App, choose Face Tracking, connect your iPhone through Bluetooth to the Arduino, enjoy!