If you ever wanted to to see what Symmetra’s sentry turrets from Overwatch would look like in real life, now you can thanks to Mr. Volt. The YouTuber has produced a pair of them powered by a LiPo battery and controlled with an Arduino Mega, utilizing a relay shield to provide enough power to each laser.
In theory, the turrets can each be aimed with a servo motor and sense objects with an infrared range finder. The main control feature, however, is an arcade button that controls firing, along with a big red e-stop switch to cut things off as needed.
After a couple weeks of tinkering, my first iteration of Symmetra’s turrets are alive! They may be 3D-printed instead of hard light constructs, but I still think they’re pretty cool. Each turret holds a 2W 445nm laser and RGB (Dotstar) LEDs. They’re controlled by an Arduino Mega and some relays.
You can see it demonstrated popping balloons at just after the 8:30 mark in the video below. Also, please be sure to use the necessary precautions when working with lasers. For his part, Mr. Volt decided to build his own FPV rig out of a welding helmet!