![]() The translucent bases are covered with the opaque symbol caps. The back lit button key caps were printed in two parts. This allows all 39 buttons to be connected via five analog inputs and was probably done to simplify PCB track layout. For the keyboard, four banks of nine buttons and another bank of three are connected via a resistive ladder to the analog GPIO’s. The 39 LEDs are APA102C’s so they only need two GPIO pins. The Dial Home Device is built around a custom, circular PCB which holds the keypad buttons, LEDs and an ATmega 32u4 micro-controller which connects to the Raspberry Pi via USB. The wormhole is maintained for 38 minutes, after which the Stargate powers down. Once a worm hole is established, random audio snippets are played. ![]() A USB sound card and a powered speaker provide audio effects while dialling. A Raspberry Pi with three piggy backed motor hats controls the various motors and LEDs. The symbol ring is driven by a separate NEMA14 stepper motor. The seven Chevrons move along 3D printed rack-and-pinion gears, driven by geared micro-motors. The Stargate ring is assembled from multiple 3D printed in sections, and measures 390 mm across. The Dial Home Device (DHD) is a replica of the original pedestal shaped computer, with two concentric sets of 19 buttons and a central activation button. When the correct address has been dialled in, the wormhole is established, via an infinity mirror effect that uses 122 RGB LEDs. ’s Stargate is mostly 3D printed and features a symbol ring, with chevrons that lock and light up when engaged. Building an authentic looking prop requires a lot of attention to detail, and ’s The Stargate Project is an amazingly well built rendition of the portal. Prop makers and hackers often try building their own Stargate replica – the Einstein–Rosen bridge portal that allows almost instantaneous travel between two distant locations. The Stargate Universe franchise has spawned numerous movies, serials, books, comics and games since 1994, and has been a favorite among science fiction fans.
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