Portal 2 Turret

thingiverse

************************* UPDATED ************************* v4 parts - revised body, wings, pitch frame - reduced the bridging in the body which required revised wings and pitch frame. v4 of rear leg is stretched a little to make more room for a connector. The "leg-rear test" is an option to replace proper rear leg, but allows one to easily plug in the mini-usb connector to power and upload the turret. Use these along with v3 or highest revision of parts. v3 of body incorporates larger eye, more similar to game character. ****************************************************************** This holiday season, I decided to design and build a fully functional, talking Portal turret gun from the game Portal 2. For me, this was an exercise in properly modeling the entire assembly in Fusion 360 first, before building anything. This design utilizes an Arduino Nano, an MP3 player chip, distance sensor, servos, LEDs, and 3D printed parts. The goal here was to make it move in three axes with spoken sound from the game and LED's to simulate firing. - Open the "wings" if it senses someone in front. Use a crank mechanism with sliders for no particular reason. - If the person is still there after opening, fire until they drop. LED's and machine gun sounds will be heard. - If the person is no longer there, run a little scanning search routine. - Close up and go to sleep until someone else comes along. - Use Portal turret sounds and voices from the game. I took some liberties in the design, trying to make it appreciably the same as the one seen in the game, but functional and printable. With some basic sketches found online, I started modeling and planning... The sounds are stored on a microSD card, which is accessible from the back side so that sounds may be updated or changed later. It is inline with the black infill strip, making it essentially invisible once installed. 18 individual expressions and sounds used in this go-round. The lidar sensor (time-of-flight) is on a chip with a rectangular profile. This sensor is nearly invisible from the front once assembled. The full project and code are available on Instructables.com https://www.instructables.com/id/Portal-2-Turret-Gun/