So you want to build your own robotic flamethrower? FollowNikko has published a quick guide that shows you how to get started. This Arduino-powered flamethrower robot is the work of a 19-year-old Engineering student. You are going to need an Arduino Nano, Bluetooth module, Servo TowerPro SG5010 , batteries, brass pipe, steel sheet, trolley wheel, and a few other parts to complete this project.
More instructions are available on Instructables.com. The robot remains a work in progress.