Summary

Powered by an Arduino nano, an 9g servo, some buttons and a lcd display

https://www.youtube.com/watch?v=WIepN9gvDh0

Parts:
http://www.aliexpress.com/item/1602-16x2-HD44780-Character-LCD-w-IIC-I2C-1602-Serial-Interface-Adapter-Module/2042039421.html
http://www.aliexpress.com/item/Free-Shipping-2PCS-LOT-SG90-9g-Mini-Micro-Servo-for-RC-for-RC-250-450-Helicopter/2055708169.html
http://www.aliexpress.com/item/Free-Shipping-1PCS-Nano-3-0-controller-compatible-with-nano-CH340-USB-driver-NO-CABLE-for/32259793183.html