LEDdial

prusaprinters

<p>A clock whose hands are "shadows" projected by LEDs.</p> <h3>Print instructions</h3><h3>Hardware Requirements</h3> <ul> <li><a href="https://www.amazon.com/gp/product/B00JYPJAL2/">WS2812B LED strip</a>.</li> <li>An Arduino or compatible board.</li> <li>Breadboard</li> <li>Soldering iron</li> <li>Solid wires</li> <li>3D printer</li> </ul> <h3>Software Requirements</h3> <ul> <li>Arduino IDE</li> </ul> <h3>Building Instructions</h3> <ol> <li>3D print the LEDdial and gnomon STLs. These can be printed without supports, however there are a lot of 45º angles in the LEDdial module, so it may require a finely tuned 3D printer. The gnomon can be any color, but I recommend to use a light color, preferably white, for the LEDdial as it will improve visibility for the "shadows". The LEDdial STL is pretty big, so you might have to print it on a 45º angle and without a skirt.</li> <li>Cut a piece of filament of about 8mm.</li> <li>Insert the piece of filament in the hole on the center of the LEDdial.</li> <li>Insert the gnomon in the other end of the stick. </li> <li>Cut 3 segments of 24 LEDs from the LED strip and solder wires into their inputs.</li> <li>Attach each of the strips into the 3 strip guides inside LEDdial. The first LED from the side without cables should be aligned with 9 o'clock and the rest of the LEDs should follow counter-clockwise.</li> <li>Insert the cables into the small windows on the side of the clock and pull them to the back of the clock.</li> <li>Connect all the 5v cables into the VIN/RAW pin in the Arduino.</li> <li>Connect all the -/GND cables into the GND pin in the Arduino.</li> <li>Connect the strips, from top to bottom, into the digital 4, 3, and 2 pins in the Arduino.</li> <li>Connect a wire between the digital 5 pin and GND in the Arduino.</li> <li>Flash the <a href="https://github.com/JavierRizzoA/LEDdial/blob/master/LEDdial.ino">LEDdial.ino</a> file into the Arduino board.</li> <li>To adjust the time in the clock, disconnect the cable that is between digital 5 and GND. This will make the clock go faster.</li> </ol>