My pet dog loves playing with toys especially ones he can chase! I built a robotic ball that switches on and rolls away whenever he interacts with it, notifies me via my mobile phone where I can then take over control and finally powers down when the fun is over to save battery.

https://www.youtube.com/watch?v=YORRBN_0tdM

The ball uses a d1 mini micro-controller, programmed using Arduino and is put together using some 3D-printed parts and some cheap, readily available components.

For this project you will need:

17cm diameter Hamster Ball (https://www.amazon.co.uk/gp/product/B001B5DPB4/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=B001B5DPB4&linkCode=as2&tag=cabuu-21&linkId=24782b2643cb8cd86e2358c13c0d9bb6) 2 x DC Motors and Wheels (https://www.amazon.co.uk/gp/product/B001B5DPB4/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=B001B5DPB4&linkCode=as2&tag=cabuu-21&linkId=24782b2643cb8cd86e2358c13c0d9bb6) Or (https://www.banggood.com/custlink/GKmGBes7RB) Wemos D1 Mini (https://www.banggood.com/custlink/GDmv4JTGLi) WS2812B RGB LED (https://www.banggood.com/custlink/KK3GBr7RcZ) 2N2222 Transistor (https://www.banggood.com/custlink/DDm3eJ7DbH) Buzzer (https://www.banggood.com/custlink/Dv33g6N1hQ) KY-002 Shock Sensor (https://www.amazon.co.uk/gp/product/B001B5DPB4/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=B001B5DPB4&linkCode=as2&tag=cabuu-21&linkId=24782b2643cb8cd86e2358c13c0d9bb6) 2 x 14500 3.7V Li-Ion Batteries (https://www.banggood.com/custlink/m33GB6n1Jv) AA Battery Holder with switch (https://www.banggood.com/custlink/mGDv4BnTpt) L298N Motor Driver Board (https://www.amazon.co.uk/gp/product/B001B5DPB4/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=B001B5DPB4&linkCode=as2&tag=cabuu-21&linkId=24782b2643cb8cd86e2358c13c0d9bb6) Or (https://www.banggood.com/custlink/mvGG0gbTco) Various length wires Vaious M2 and M3 screws 5 x 3D-Printed parts

Further details available at: http://www.cabuu.com and https://www.instructables.com/id/Pet-Robot-Ball