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An array of PIR sensors could potentially be integrated instead, to map movement around the turret in more than one dimension. This ultrasonic motion sensor was capable of detecting how close things are to it, but is limited to 30 degrees of vision and can only detect proximity in a straight line. This proved to be a little too difficult a task for the Arduino hardware to handle, and a potential upgraded version of the turret in the future will make use of Raspberry Pi hardware instead.Įventually he decided that the best way to track motion would be with a HC-SR04 proximity sensor.
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He planned to use motion tracking software Open CV to control the system, with lasers on the turret being guided according to information sent from the camera. The initial concept that Gioiosa had in mind for the turret was that it would incorporate a webcam to track the movement of people around it. The 3D print job was relatively simple but time-consuming, with a number of different parts to be printed and then some extensive post-processing tasks.
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Four MG996R Digital Metal Gear Servos were used to get the turret to move as he wanted it to, and he took a speaker from a bluetooth shower radio.
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Most of the designs were done using the Solidworks software program, which Gioiosa had free access to through his course. Gioiosa’s three main requirements for the project were that the turret’s arms would be able to pop out, it would be able to speak, and it would be able to make use of a proximity sensor. It designs and manufactures single-board microcontrollers and microcontroller kits for building digital devices and interactive objects.Īrduino was perfect for the sentry turret project as using the Arduino hardware would enable the turret to incorporate similar functionality to the original in-game version, rather than just being a 3D printed prop. Arduino is a dedicated open source computer hardware and software company, project, and user community. The only requirements for the maker assignment he was given by the college were that it had to make use of 3D printing technology and Arduino hardware.
They have always been Gioiosa’s favourites, and he was excited to get the opportunity to have his own real-life version, imagining how ‘’cool’’ it would be. The sentry turrets he attempted to recreate are made by the fictional in-game company Aperture Science, and they are not just inanimate parts of the scenery but characters in their own right. Mechanical engineering student Gioiosa says that he’s been obsessed with Portal ever since he first played the original game. The results he achieved are pretty impressive for a first time 3D print project, with a high degree of attention to detail including arms and a built-in motion sensor.
As part of a maker course at the University of Florida, the Portal enthusiast 3D printed a replica of Aperture Science sentry turret, one of the game’s iconic turrets.
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